{"id":964,"date":"2026-04-07T15:25:28","date_gmt":"2026-04-07T15:25:28","guid":{"rendered":"https:\/\/hxcnc.com\/?page_id=964"},"modified":"2026-06-09T09:17:41","modified_gmt":"2026-06-09T09:17:41","slug":"spline-shafts","status":"publish","type":"page","link":"https:\/\/hxcnc.com\/ro\/product\/spline-shafts\/","title":{"rendered":"Axe cu caneluri"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"964\" class=\"elementor elementor-964\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-011e690 e-con-full e-flex e-con e-parent\" data-id=\"011e690\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cde209d elementor-widget elementor-widget-html\" data-id=\"cde209d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@300;400;500;700;900&family=Roboto+Condensed:wght@400;700;900&family=Roboto+Mono:wght@400;500&display=swap\" rel=\"stylesheet\">\n<style>\n.hxc-faq-q,\n.hxc-faq-q:hover,\n.hxc-faq-q:focus,\n.hxc-faq-q:active,\n.hxc-faq-q:focus-visible {\n  background: transparent !important;\n  box-shadow: none !important;\n  outline: none !important;\n}\n.hxc-faq-q:hover,\n.hxc-faq-q.open { color: var(--primary); }\n\n\/* \u2550\u2550\u2550 TOKENS \u2550\u2550\u2550 *\/\n.hxc-wrap{\n  --bg:#F7F9FC;--card:#FFFFFF;--surface:#EEF3F8;\n  --text:#1F2937;--muted:#5B6777;--mute2:#9CA8B4;--border:#D7E0EA;\n  --primary:#2563EB;--hover:#1D4ED8;\n  --pa:rgba(37,99,235,.08);--pb:rgba(37,99,235,.15);--pc:rgba(37,99,235,.22);\n  --accent:#0F766E;\n  --aa:rgba(15,118,110,.08);--ac:rgba(15,118,110,.22);\n  --amb:#B45309;--amA:rgba(180,83,9,.1);--amC:rgba(180,83,9,.25);\n  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board\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 *\/\n.hxc-hero2{\n  background:var(--card);\n  overflow:hidden;\n  position:relative;\n  border-bottom:0.5px solid var(--border);\n}\n.hxc-hero2::before{\n  content:'';position:absolute;inset:0;\n  background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);\n  background-size:44px 44px;\n  opacity:.18;pointer-events:none;\n}\n.hxc-hero2::after{\n  content:'';position:absolute;top:0;right:0;bottom:0;width:44%;\n  background:linear-gradient(270deg,var(--surface),transparent);\n  pointer-events:none;\n}\n.hxc-hero2-stripe{\n  position:absolute;top:0;left:0;right:0;height:3px;\n  background:linear-gradient(90deg,var(--amb),#F59E0B,var(--amb));\n  z-index:2;\n}\n\n.hxc-hero2-grid{\n  position:relative;z-index:1;\n  display:grid;\n  grid-template-columns:1fr 520px;\n  min-height:640px;\n  align-items:stretch;\n}\n\n\/* LEFT *\/\n.hxc-hero2-L{\n  padding:80px 52px 72px 0;\n  display:flex;flex-direction:column;justify-content:center;\n  border-right:1px solid var(--border);\n}\n.hxc-hero2-flag{\n  display:flex;align-items:center;gap:10px;\n  margin-bottom:20px;flex-wrap:wrap;\n}\n.hxc-hero2-badge{\n  padding:4px 14px;border-radius:100px;\n  background:var(--pa);border:1px solid var(--pc);\n  font-family:var(--mn);font-size:10px;\n  color:var(--primary);\n  letter-spacing:2px;text-transform:uppercase;\n}\n.hxc-hero2-badge-amb{\n  background:var(--amA);border-color:var(--amC);color:var(--amb);\n}\n.hxc-hero2-id{\n  font-family:var(--mn);font-size:10px;\n  color:var(--mute2);letter-spacing:2px;\n}\n.hxc-hero2-h1{\n  font-family:var(--hd);\n  font-size:clamp(38px,5vw,68px);\n  font-weight:900;\n  line-height:.96;\n  letter-spacing:-2px;\n  color:var(--text);\n  margin-bottom:18px;\n}\n.hxc-hero2-h1 em{\n  color:var(--primary);\n  font-style:normal;\n  display:block;\n}\n.hxc-hero2-sub{\n  font-size:15px;color:var(--muted);\n  max-width:500px;line-height:1.78;\n  margin-bottom:28px;\n}\n.hxc-hero2-stats{\n  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;\n  max-width:500px;margin-bottom:30px;\n}\n.hxc-hero2-stat{\n  padding:14px 10px;\n  background:var(--surface);\n  border:1px solid var(--border);\n  border-radius:10px;\n  text-align:center;\n  transition:all .18s;\n}\n.hxc-hero2-stat:hover{\n  background:var(--pa);border-color:var(--pc);\n}\n.hxc-hero2-stat-v{\n  font-family:var(--hd);\n  font-size:19px;font-weight:900;\n  color:var(--primary);line-height:1;\n}\n.hxc-hero2-stat-v sup{font-size:10px;font-weight:700;}\n.hxc-hero2-stat-l{\n  font-family:var(--mn);\n  font-size:9px;color:var(--mute2);\n  letter-spacing:1.5px;text-transform:uppercase;\n  margin-top:5px;\n}\n.hxc-hero2-btns{display:flex;gap:12px;flex-wrap:wrap;}\n\n\/* RIGHT \u2014 dark technical board *\/\n.hxc-hero2-R{\n  position:relative;\n  padding:40px 0 40px 48px;\n}\n.hxc-hero2-board{\n  position:relative;\n  background:linear-gradient(165deg,#0F172A 0%,#1E293B 60%,#0F172A 100%);\n  border-radius:24px;\n  height:100%;min-height:560px;\n  overflow:hidden;\n  box-shadow:0 30px 80px -20px rgba(15,23,42,.35),0 8px 24px -6px rgba(15,23,42,.2);\n}\n.hxc-hero2-board::before{\n  content:'';position:absolute;inset:0;\n  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);\n  background-size:32px 32px;\n}\n.hxc-hero2-board::after{\n  content:'';position:absolute;top:-30%;right:-20%;\n  width:70%;height:70%;\n  background:radial-gradient(circle,rgba(15,118,110,.32),transparent 70%);\n}\n.hxc-hero2-ribbon{\n  position:absolute;top:18px;left:18px;right:18px;\n  display:flex;justify-content:space-between;align-items:center;\n  z-index:3;\n  font-family:var(--mn);font-size:10px;\n  color:rgba(255,255,255,.5);\n  letter-spacing:2px;text-transform:uppercase;\n}\n.hxc-hero2-ribbon .dot{\n  width:8px;height:8px;border-radius:50%;\n  background:#22C55E;\n  box-shadow:0 0 0 3px rgba(34,197,94,.2);\n  display:inline-block;margin-right:8px;vertical-align:middle;\n  animation:hxc-h2-pulse 2s ease-in-out infinite;\n}\n@keyframes hxc-h2-pulse{\n  0%,100%{box-shadow:0 0 0 3px rgba(34,197,94,.2);}\n  50%{box-shadow:0 0 0 6px rgba(34,197,94,.08);}\n}\n.hxc-hero2-scene{\n  position:absolute;inset:0;\n  display:flex;align-items:center;justify-content:center;\n  z-index:2;\n}\n.hxc-hero2-scene svg{width:94%;height:auto;}\n\n.hxc-hero2-pin{\n  position:absolute;z-index:3;\n  display:flex;align-items:center;gap:8px;\n  padding:5px 11px 5px 7px;\n  background:rgba(255,255,255,.95);\n  border-radius:100px;\n  font-family:var(--mn);font-size:10px;font-weight:600;\n  color:var(--primary);\n  box-shadow:0 4px 12px rgba(0,0,0,.3);\n}\n.hxc-hero2-pin::before{\n  content:'';width:6px;height:6px;border-radius:50%;\n  background:var(--primary);\n}\n.hxc-hero2-pin-a{background:rgba(254,243,199,.95);color:var(--amb);}\n.hxc-hero2-pin-a::before{background:var(--amb);}\n.hxc-hero2-pin-t{background:rgba(204,251,241,.95);color:var(--accent);}\n.hxc-hero2-pin-t::before{background:var(--accent);}\n.hxc-hero2-pin-1{top:24%;left:6%;}\n.hxc-hero2-pin-2{top:50%;right:8%;}\n.hxc-hero2-pin-3{bottom:28%;left:12%;}\n\n.hxc-hero2-chips{\n  position:absolute;left:18px;right:18px;bottom:18px;\n  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;\n  z-index:3;\n}\n.hxc-hero2-chip{\n  padding:12px 14px;\n  background:rgba(255,255,255,.06);\n  border:1px solid rgba(255,255,255,.12);\n  border-radius:10px;\n  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);\n}\n.hxc-hero2-chip-v{\n  font-family:var(--hd);\n  font-size:13px;font-weight:700;\n  color:#fff;line-height:1.15;\n}\n.hxc-hero2-chip-v span{font-size:10px;font-weight:600;}\n.hxc-hero2-chip-l{\n  font-family:var(--mn);\n  font-size:8px;color:rgba(255,255,255,.55);\n  letter-spacing:1.5px;text-transform:uppercase;\n  margin-top:4px;\n}\n\n\/* STATS *\/\n.hxc-stats{background:var(--card);border-bottom:0.5px solid var(--border)}\n.hxc-sg{max-width:1200px;margin:0 auto;padding:0 48px;display:grid;grid-template-columns:repeat(4,1fr)}\n.hxc-st{padding:28px 20px;text-align:center;border-right:0.5px solid var(--border)}\n.hxc-st:last-child{border-right:none}\n.hxc-sn{font-family:var(--mn);font-size:26px;font-weight:500;color:var(--accent);line-height:1}\n.hxc-sl2{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.4}\n\n\/* GALLERY *\/\n.hxc-gh{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:32px;gap:20px;flex-wrap:wrap}\n.hxc-gg{display:grid;grid-template-columns:repeat(12,1fr);gap:8px}\n.hxc-gc{position:relative;overflow:hidden;border-radius:var(--rl);background:var(--surface);cursor:pointer}\n.hxc-gc img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .45s ease}\n.hxc-gc:hover img{transform:scale(1.05)}\n.hxc-gov{position:absolute;inset:0;background:linear-gradient(to top,rgba(15,25,60,.72) 0%,transparent 55%);display:flex;flex-direction:column;justify-content:flex-end;padding:14px;opacity:0;transition:opacity .3s}\n.hxc-gc:hover .hxc-gov{opacity:1}\n.hxc-gn{font-family:var(--hd);font-size:13px;font-weight:700;color:#fff;line-height:1.3;margin-bottom:2px}\n.hxc-gm{font-size:10px;color:rgba(255,255,255,.72);font-family:var(--mn)}\n.hxc-gtag{position:absolute;top:10px;left:10px;background:rgba(255,255,255,.92);border-radius:4px;padding:3px 8px;font-size:10px;font-weight:600;color:var(--accent);font-family:var(--mn)}\n.hxc-a{grid-column:span 5;min-height:340px}\n.hxc-b{grid-column:span 4;min-height:164px}\n.hxc-c{grid-column:span 3;min-height:164px}\n.hxc-d{grid-column:span 3;min-height:164px}\n.hxc-e{grid-column:span 4;min-height:164px}\n.hxc-f{grid-column:span 5;min-height:164px}\n.hxc-gg7{grid-column:span 4;min-height:164px}\n.hxc-gg8{grid-column:span 3;min-height:164px}\n\n\/* CAPABILITIES (no image column) *\/\n.hxc-cw{background:var(--card);border:0.5px solid var(--border);border-radius:var(--rx);overflow:hidden;display:grid;grid-template-columns:230px 1fr}\n.hxc-csb{border-right:0.5px solid var(--border);padding:8px 0}\n.hxc-ct{display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;transition:all .2s;border-left:3px solid transparent;font-size:13px;color:var(--muted)}\n.hxc-ct:hover{background:#fafbfc;color:var(--text)}\n.hxc-ct.on{background:var(--surface);color:var(--primary);font-weight:500;border-left-color:var(--primary)}\n.hxc-ci{width:34px;height:34px;border-radius:var(--r);background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}\n.hxc-ct.on .hxc-ci{background:#DBEAFE}\n.hxc-cb{display:none;animation:hxc-fi .2s ease}\n.hxc-cb.on{display:block}\n@keyframes hxc-fi{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}\n.hxc-ctx{padding:26px 28px}\n.hxc-cttl{font-family:var(--hd);font-size:17px;font-weight:700;margin-bottom:7px}\n.hxc-cdesc{font-size:13px;color:var(--muted);line-height:1.75;margin-bottom:18px}\n.hxc-tbl{width:100%;border-collapse:collapse}\n.hxc-tbl tr{border-bottom:0.5px solid var(--border)}\n.hxc-tbl tr:last-child{border-bottom:none}\n.hxc-tbl td{padding:9px 0;font-size:12px;vertical-align:middle}\n.hxc-tbl td:first-child{color:var(--muted);width:200px}\n.hxc-tbl td:last-child{font-family:var(--mn);font-weight:500;font-size:12px}\n.hxc-hi{background:#E0F2EE;color:var(--accent);border-radius:3px;padding:1px 6px;font-size:11px;font-weight:600;font-family:var(--mn)}\n\n\/* MATERIALS *\/\n.hxc-mts{display:flex;border:0.5px solid var(--border);border-radius:var(--r);overflow:hidden;width:fit-content;margin-bottom:28px}\n.hxc-mtt{padding:9px 22px;font-size:13px;font-weight:500;color:var(--muted);cursor:pointer;background:var(--card);transition:all .2s;border-right:0.5px solid var(--border)}\n.hxc-mtt:last-child{border-right:none}\n.hxc-mtt.on{background:var(--primary);color:#fff}\n.hxc-mg{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}\n.hxc-mc{background:var(--card);border:0.5px solid var(--border);border-radius:var(--rl);overflow:hidden;cursor:pointer;transition:all .25s}\n.hxc-mc:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,.1)}\n.hxc-mci{height:128px;overflow:hidden}\n.hxc-mci img{width:100%;height:100%;object-fit:cover;transition:transform .35s}\n.hxc-mc:hover .hxc-mci img{transform:scale(1.07)}\n.hxc-mif{padding:13px 15px}\n.hxc-mn{font-size:13px;font-weight:500;margin-bottom:5px}\n.hxc-mp{font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:9px}\n.hxc-mtgs{display:flex;gap:4px;flex-wrap:wrap}\n.hxc-mtg{font-size:10px;font-weight:600;padding:2px 6px;border-radius:3px;background:var(--surface);color:var(--muted)}\n\n\/* PROCESS *\/\n.hxc-psg{display:grid;grid-template-columns:repeat(4,1fr);position:relative;margin-top:52px}\n.hxc-psg::before{content:'';position:absolute;top:27px;left:calc(12.5% + 20px);right:calc(12.5% + 20px);height:1px;background:repeating-linear-gradient(90deg,var(--primary) 0,var(--primary) 6px,transparent 6px,transparent 14px);z-index:0}\n.hxc-ps{display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 12px;position:relative;z-index:1}\n.hxc-psn{width:54px;height:54px;border-radius:50%;background:var(--primary);color:#fff;font-family:var(--mn);font-size:15px;font-weight:500;display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 0 0 6px var(--surface),0 0 0 7px var(--border)}\n.hxc-pst{font-family:var(--hd);font-size:14px;font-weight:700;margin-bottom:7px}\n.hxc-psd{font-size:12px;color:var(--muted);line-height:1.65;max-width:180px}\n\n\/* QUALITY *\/\n.hxc-qg{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}\n.hxc-qc{display:flex;align-items:center;gap:14px;background:var(--card);border:0.5px solid var(--border);border-radius:var(--rl);padding:14px 16px;margin-bottom:10px}\n.hxc-qci{width:42px;height:42px;border-radius:var(--r);background:#E0F2EE;color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}\n.hxc-qcn{font-size:13px;font-weight:500;margin-bottom:2px}\n.hxc-qcd{font-size:11px;color:var(--muted)}\n.hxc-qs{display:flex;gap:14px;padding:16px 0;border-bottom:0.5px solid var(--border)}\n.hxc-qs:last-child{border-bottom:none}\n.hxc-qsn{width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px;font-family:var(--mn)}\n.hxc-qst{font-size:13px;font-weight:500;margin-bottom:3px}\n.hxc-qsd{font-size:12px;color:var(--muted);line-height:1.6}\n\n\/* CASE STUDIES *\/\n.hxc-casg{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}\n.hxc-casc{background:var(--card);border:0.5px solid var(--border);border-radius:var(--rx);overflow:hidden;transition:all .25s}\n.hxc-casc:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(37,99,235,.1);border-color:var(--primary)}\n.hxc-casi{height:210px;position:relative;overflow:hidden}\n.hxc-casi img{width:100%;height:100%;object-fit:cover;transition:transform .4s}\n.hxc-casc:hover .hxc-casi img{transform:scale(1.05)}\n.hxc-casl{position:absolute;top:12px;left:12px;background:var(--primary);color:#fff;font-size:10px;font-weight:600;padding:3px 9px;border-radius:4px;font-family:var(--mn)}\n.hxc-casb{padding:18px 20px}\n.hxc-cast{font-family:var(--hd);font-size:15px;font-weight:700;margin-bottom:10px}\n.hxc-casm{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:12px}\n.hxc-kv{background:var(--surface);border-radius:var(--r);padding:8px 10px}\n.hxc-k{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:2px}\n.hxc-v{font-size:12px;font-weight:500;font-family:var(--mn)}\n.hxc-casr{font-size:12px;color:var(--accent);font-weight:500;border-top:0.5px solid var(--border);padding-top:10px}\n\n\/* APPLICATIONS *\/\n.hxc-apg{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}\n.hxc-apc{background:var(--card);border:0.5px solid var(--border);border-radius:var(--rl);overflow:hidden;transition:all .25s}\n.hxc-apc:hover{border-color:var(--primary);transform:translateY(-2px)}\n.hxc-api{height:130px;overflow:hidden}\n.hxc-api img{width:100%;height:100%;object-fit:cover;transition:transform .35s}\n.hxc-apc:hover .hxc-api img{transform:scale(1.06)}\n.hxc-apb{padding:14px 16px}\n.hxc-apt{font-family:var(--hd);font-size:13px;font-weight:700;margin-bottom:5px}\n.hxc-apd{font-size:12px;color:var(--muted);line-height:1.55}\n\n\/* TESTIMONIALS *\/\n.hxc-tsg{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}\n.hxc-tsi{background:var(--card);border:0.5px solid var(--border);border-radius:var(--rl);padding:22px;display:flex;flex-direction:column;gap:12px}\n.hxc-tss{color:#F59E0B;font-size:13px;letter-spacing:2px}\n.hxc-tst{font-size:13px;color:var(--muted);line-height:1.75;flex:1}\n.hxc-tshr{border-top:0.5px solid var(--border)}\n.hxc-tsau{display:flex;align-items:center;gap:10px}\n.hxc-tsav{width:36px;height:36px;border-radius:50%;background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:var(--primary);flex-shrink:0}\n.hxc-tsnm{font-size:12px;font-weight:500}\n.hxc-tsco{font-size:11px;color:var(--muted)}\n\n\/* FAQ *\/\n.hxc-faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;align-items:start}\n.hxc-faq-item{border-bottom:0.5px solid var(--border)}\n.hxc-faq-q{width:100%;background:none;border:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;font-family:var(--bd);font-size:14px;font-weight:500;color:var(--text);cursor:pointer;text-align:left;transition:color .2s}\n.hxc-faq-q:hover,.hxc-faq-q.open{color:var(--primary)}\n.hxc-faq-icon{width:22px;height:22px;border-radius:50%;background:var(--surface);border:0.5px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:14px;line-height:1;transition:all .25s;color:var(--muted)}\n.hxc-faq-q.open .hxc-faq-icon{background:var(--primary);border-color:var(--primary);color:#fff;transform:rotate(45deg)}\n.hxc-faq-body{display:none;padding:0 0 18px;font-size:13px;color:var(--muted);line-height:1.75}\n.hxc-faq-body.open{display:block;animation:hxc-faq-in .2s ease}\n@keyframes hxc-faq-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}\n.hxc-faq-body strong{color:var(--text);font-weight:500}\n\n\/* CTA *\/\n.hxc-cta{background:var(--primary);padding:80px 48px;text-align:center;position:relative;overflow:hidden}\n.hxc-cta::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 25% 50%,rgba(255,255,255,.07),transparent 60%),radial-gradient(ellipse at 75% 50%,rgba(255,255,255,.05),transparent 60%)}\n.hxc-cta>*{position:relative;z-index:1}\n.hxc-ctat{font-family:var(--hd);font-size:clamp(24px,3vw,36px);font-weight:900;color:#fff;line-height:1.2;margin-bottom:12px}\n.hxc-ctasb{font-size:15px;color:rgba(255,255,255,.72);margin-bottom:32px;max-width:460px;line-height:1.7;margin-left:auto;margin-right:auto}\n.hxc-ctabs{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}\n.hxc-ctan{margin-top:16px;font-size:12px;color:rgba(255,255,255,.45);font-family:var(--mn)}\n\n.hxc-rv{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}\n.hxc-rv.in{opacity:1;transform:none}\n\n@media(max-width:1050px){\n  .hxc-hero2-grid{grid-template-columns:1fr;min-height:auto;}\n  .hxc-hero2-L{padding:64px 0 32px;border-right:none;}\n  .hxc-hero2-R{padding:0 0 48px;}\n}\n@media(max-width:1024px){\n  .hxc-inner,.hxc-sg{padding:0 32px}\n  .hxc-cw{grid-template-columns:1fr}\n  .hxc-gg{grid-template-columns:repeat(6,1fr)}\n  .hxc-a{grid-column:span 4;min-height:260px}\n  .hxc-b,.hxc-c,.hxc-d,.hxc-e,.hxc-f,.hxc-gg7,.hxc-gg8{grid-column:span 3;min-height:150px}\n  .hxc-qg,.hxc-casg{grid-template-columns:1fr}\n}\n@media(max-width:768px){\n  .hxc-inner,.hxc-sg{padding:0 20px}\n  .hxc-s,.hxc-s-sf,.hxc-s-cd{padding:52px 0}\n  .hxc-gg{grid-template-columns:1fr 1fr;gap:6px}\n  .hxc-a,.hxc-b,.hxc-c,.hxc-d,.hxc-e,.hxc-f,.hxc-gg7,.hxc-gg8{grid-column:span 2;min-height:150px}\n  .hxc-sg{grid-template-columns:repeat(2,1fr)}\n  .hxc-st:nth-child(2){border-right:none}\n  .hxc-st:nth-child(3){border-right:0.5px solid var(--border)}\n  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\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n     HERO \u2014 ALS-style technical board\n     re-skinned for Spline Shafts\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n<section class=\"hxc-hero2\">\n  <div class=\"hxc-hero2-stripe\"><\/div>\n  <div class=\"hxc-inner\">\n    <div class=\"hxc-hero2-grid\">\n\n      <!-- LEFT -->\n      <div class=\"hxc-hero2-L\">\n        <div class=\"hxc-hero2-flag\">\n          <div class=\"hxc-hero2-badge\">Product Category<\/div>\n          <div class=\"hxc-hero2-badge hxc-hero2-badge-amb\">China CNC Spline Shaft Factory<\/div>\n          <div class=\"hxc-hero2-id\">SPL \/ 001 \u2014 003<\/div>\n        <\/div>\n        <h1 class=\"hxc-hero2-h1\">\n          Custom Spline Shafts<br><em>Involute &amp; Parallel Key<\/em>\n        <\/h1>\n        <p class=\"hxc-hero2-sub\">High-precision external spline shafts \u2014 involute, parallel-key, serrated, hollow, gear spline shafts, and motor \/ hydraulic pump spline shafts. Diameter 6\u2013400 mm, ground to DIN 5480 \/ ISO 4156 \/ ANSI B92.1 \/ SAE. Made in our China factory, customized spline shaft quotation in 48 hours.<\/p>\n        <div class=\"hxc-hero2-stats\">\n          <div class=\"hxc-hero2-stat\"><div class=\"hxc-hero2-stat-v\">\u00b10.005<sup>mm<\/sup><\/div><div class=\"hxc-hero2-stat-l\">OD Tolerance<\/div><\/div>\n          <div class=\"hxc-hero2-stat\"><div class=\"hxc-hero2-stat-v\">\u00d86\u2013400<\/div><div class=\"hxc-hero2-stat-l\">Diameter Range<\/div><\/div>\n          <div class=\"hxc-hero2-stat\"><div class=\"hxc-hero2-stat-v\">Grade 5\u20136<\/div><div class=\"hxc-hero2-stat-l\">DIN 5480 Class<\/div><\/div>\n        <\/div>\n        <div class=\"hxc-hero2-btns\">\n          <a href=\"#hxc-cta\" class=\"hxc-btn hxc-p\">Get Customized Quotation <span class=\"hxc-ar\">\u2192<\/span><\/a>\n          <a href=\"#hxc-gal\" class=\"hxc-btn hxc-o\">View Our Work<\/a>\n        <\/div>\n      <\/div>\n\n      <!-- RIGHT \u2014 dark technical board -->\n      <div class=\"hxc-hero2-R\">\n        <div class=\"hxc-hero2-board\">\n\n          <div class=\"hxc-hero2-ribbon\">\n            <span><span class=\"dot\"><\/span>PART DWG \u00b7 SPL-000 SPLINE SHAFT<\/span>\n            <span>ISO 9001 : 2015<\/span>\n          <\/div>\n\n          <div class=\"hxc-hero2-pin hxc-hero2-pin-a hxc-hero2-pin-1\">DIN 5480 \u00b7 30\u00b0 PA<\/div>\n          <div class=\"hxc-hero2-pin hxc-hero2-pin-2\">Hardened HRC 58<\/div>\n          <div class=\"hxc-hero2-pin hxc-hero2-pin-t hxc-hero2-pin-3\">Over-Pin Verified<\/div>\n\n          <div class=\"hxc-hero2-scene\">\n            <svg viewBox=\"0 0 480 360\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-label=\"Spline shaft technical drawing \u2014 external involute spline section, end view, and dimensional callouts\">\n              <defs>\n                <linearGradient id=\"splMetal\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\">\n                  <stop offset=\"0\" stop-color=\"#E2E8F0\"\/>\n                  <stop offset=\".5\" stop-color=\"#CBD5E1\"\/>\n                  <stop offset=\"1\" stop-color=\"#64748B\"\/>\n                <\/linearGradient>\n                <linearGradient id=\"splMetalDark\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\">\n                  <stop offset=\"0\" stop-color=\"#94A3B8\"\/>\n                  <stop offset=\"1\" stop-color=\"#334155\"\/>\n                <\/linearGradient>\n              <\/defs>\n\n              <!-- \u2550\u2550\u2550 TOP: side view of spline shaft (long, splined middle, journals on ends) \u2550\u2550\u2550 -->\n              <g transform=\"translate(40,80)\">\n                <!-- left chamfered end -->\n                <polygon points=\"0,8 8,0 22,0 22,32 8,32 0,24\" fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n                <!-- left bearing journal -->\n                <rect x=\"22\" y=\"-2\" width=\"36\" height=\"36\" fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.3\"\/>\n                <rect x=\"22\" y=\"-2\" width=\"36\" height=\"4\" fill=\"#F1F5F9\" opacity=\".7\"\/>\n                <text x=\"40\" y=\"-8\" font-family=\"Roboto Mono,monospace\" font-size=\"7\" fill=\"#93C5FD\" text-anchor=\"middle\">k6<\/text>\n                <!-- shoulder -->\n                <rect x=\"58\" y=\"-6\" width=\"8\" height=\"44\" fill=\"url(#splMetalDark)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n                <!-- \u2500 SPLINE SECTION \u2500 -->\n                <rect x=\"66\" y=\"-2\" width=\"220\" height=\"36\" fill=\"url(#splMetalDark)\" stroke=\"#1E293B\" stroke-width=\"1.3\"\/>\n                <!-- spline teeth (vertical bars) -->\n                <g stroke=\"#1E293B\" stroke-width=\".7\">\n                  <line x1=\"72\" y1=\"-2\" x2=\"72\" y2=\"34\" \/><line x1=\"76\" y1=\"-2\" x2=\"76\" y2=\"34\"\/>\n                  <line x1=\"80\" y1=\"-2\" x2=\"80\" y2=\"34\"\/><line x1=\"84\" y1=\"-2\" x2=\"84\" y2=\"34\"\/>\n                  <line x1=\"88\" y1=\"-2\" x2=\"88\" y2=\"34\"\/><line x1=\"92\" y1=\"-2\" x2=\"92\" y2=\"34\"\/>\n                  <line x1=\"96\" y1=\"-2\" x2=\"96\" y2=\"34\"\/><line x1=\"100\" y1=\"-2\" x2=\"100\" y2=\"34\"\/>\n                  <line x1=\"104\" y1=\"-2\" x2=\"104\" y2=\"34\"\/><line x1=\"108\" y1=\"-2\" x2=\"108\" y2=\"34\"\/>\n                  <line x1=\"112\" y1=\"-2\" x2=\"112\" y2=\"34\"\/><line x1=\"116\" y1=\"-2\" x2=\"116\" y2=\"34\"\/>\n                  <line x1=\"120\" y1=\"-2\" x2=\"120\" y2=\"34\"\/><line x1=\"124\" y1=\"-2\" x2=\"124\" y2=\"34\"\/>\n                  <line x1=\"128\" y1=\"-2\" x2=\"128\" y2=\"34\"\/><line x1=\"132\" y1=\"-2\" x2=\"132\" y2=\"34\"\/>\n                  <line x1=\"136\" y1=\"-2\" x2=\"136\" y2=\"34\"\/><line x1=\"140\" y1=\"-2\" x2=\"140\" y2=\"34\"\/>\n                  <line x1=\"144\" y1=\"-2\" x2=\"144\" y2=\"34\"\/><line x1=\"148\" y1=\"-2\" x2=\"148\" y2=\"34\"\/>\n                  <line x1=\"152\" y1=\"-2\" x2=\"152\" y2=\"34\"\/><line x1=\"156\" y1=\"-2\" x2=\"156\" y2=\"34\"\/>\n                  <line x1=\"160\" y1=\"-2\" x2=\"160\" y2=\"34\"\/><line x1=\"164\" y1=\"-2\" x2=\"164\" y2=\"34\"\/>\n                  <line x1=\"168\" y1=\"-2\" x2=\"168\" y2=\"34\"\/><line x1=\"172\" y1=\"-2\" x2=\"172\" y2=\"34\"\/>\n                  <line x1=\"176\" y1=\"-2\" x2=\"176\" y2=\"34\"\/><line x1=\"180\" y1=\"-2\" x2=\"180\" y2=\"34\"\/>\n                  <line x1=\"184\" y1=\"-2\" x2=\"184\" y2=\"34\"\/><line x1=\"188\" y1=\"-2\" x2=\"188\" y2=\"34\"\/>\n                  <line x1=\"192\" y1=\"-2\" x2=\"192\" y2=\"34\"\/><line x1=\"196\" y1=\"-2\" x2=\"196\" y2=\"34\"\/>\n                  <line x1=\"200\" y1=\"-2\" x2=\"200\" y2=\"34\"\/><line x1=\"204\" y1=\"-2\" x2=\"204\" y2=\"34\"\/>\n                  <line x1=\"208\" y1=\"-2\" x2=\"208\" y2=\"34\"\/><line x1=\"212\" y1=\"-2\" x2=\"212\" y2=\"34\"\/>\n                  <line x1=\"216\" y1=\"-2\" x2=\"216\" y2=\"34\"\/><line x1=\"220\" y1=\"-2\" x2=\"220\" y2=\"34\"\/>\n                  <line x1=\"224\" y1=\"-2\" x2=\"224\" y2=\"34\"\/><line x1=\"228\" y1=\"-2\" x2=\"228\" y2=\"34\"\/>\n                  <line x1=\"232\" y1=\"-2\" x2=\"232\" y2=\"34\"\/><line x1=\"236\" y1=\"-2\" x2=\"236\" y2=\"34\"\/>\n                  <line x1=\"240\" y1=\"-2\" x2=\"240\" y2=\"34\"\/><line x1=\"244\" y1=\"-2\" x2=\"244\" y2=\"34\"\/>\n                  <line x1=\"248\" y1=\"-2\" x2=\"248\" y2=\"34\"\/><line x1=\"252\" y1=\"-2\" x2=\"252\" y2=\"34\"\/>\n                  <line x1=\"256\" y1=\"-2\" x2=\"256\" y2=\"34\"\/><line x1=\"260\" y1=\"-2\" x2=\"260\" y2=\"34\"\/>\n                  <line x1=\"264\" y1=\"-2\" x2=\"264\" y2=\"34\"\/><line x1=\"268\" y1=\"-2\" x2=\"268\" y2=\"34\"\/>\n                  <line x1=\"272\" y1=\"-2\" x2=\"272\" y2=\"34\"\/><line x1=\"276\" y1=\"-2\" x2=\"276\" y2=\"34\"\/>\n                  <line x1=\"280\" y1=\"-2\" x2=\"280\" y2=\"34\"\/>\n                <\/g>\n                <!-- spline label region top -->\n                <line x1=\"66\" y1=\"-12\" x2=\"286\" y2=\"-12\" stroke=\"#FCD34D\" stroke-width=\".8\" opacity=\".75\"\/>\n                <line x1=\"66\" y1=\"-12\" x2=\"66\" y2=\"-2\" stroke=\"#FCD34D\" stroke-width=\".5\" stroke-dasharray=\"2 2\" opacity=\".55\"\/>\n                <line x1=\"286\" y1=\"-12\" x2=\"286\" y2=\"-2\" stroke=\"#FCD34D\" stroke-width=\".5\" stroke-dasharray=\"2 2\" opacity=\".55\"\/>\n                <text x=\"176\" y=\"-16\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"#FCD34D\" text-anchor=\"middle\">DIN 5480 \u00b7 m1.5 \u00b7 Z=30 \u00b7 30\u00b0 PA<\/text>\n\n                <!-- shoulder -->\n                <rect x=\"286\" y=\"-6\" width=\"8\" height=\"44\" fill=\"url(#splMetalDark)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n                <!-- right bearing journal -->\n                <rect x=\"294\" y=\"-2\" width=\"36\" height=\"36\" fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.3\"\/>\n                <rect x=\"294\" y=\"-2\" width=\"36\" height=\"4\" fill=\"#F1F5F9\" opacity=\".7\"\/>\n                <!-- right end with keyway -->\n                <rect x=\"330\" y=\"2\" width=\"38\" height=\"28\" fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n                <rect x=\"338\" y=\"2\" width=\"14\" height=\"5\" fill=\"#1E293B\"\/>\n                <!-- chamfered tip -->\n                <polygon points=\"368,2 376,8 376,24 368,30\" fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n\n                <!-- centerline through whole shaft -->\n                <line x1=\"-6\" y1=\"16\" x2=\"382\" y2=\"16\" stroke=\"#FCD34D\" stroke-width=\".8\" stroke-dasharray=\"6 2 2 2\" opacity=\".7\"\/>\n\n                <!-- bottom dimension line for whole shaft -->\n                <g stroke=\"#60A5FA\" stroke-width=\".8\" fill=\"none\">\n                  <line x1=\"0\" y1=\"50\" x2=\"376\" y2=\"50\"\/>\n                  <path d=\"M0,50 l4,-3 l0,6 z\" fill=\"#60A5FA\"\/>\n                  <path d=\"M376,50 l-4,-3 l0,6 z\" fill=\"#60A5FA\"\/>\n                <\/g>\n                <text x=\"188\" y=\"62\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"#93C5FD\" text-anchor=\"middle\">L OAL \u00b7 GROUND POST-HT<\/text>\n              <\/g>\n\n              <!-- \u2550\u2550\u2550 BOTTOM LEFT: cross-section \/ end view of spline (gear-like) \u2550\u2550\u2550 -->\n              <g transform=\"translate(80,238)\">\n                <!-- root circle -->\n                <circle cx=\"0\" cy=\"0\" r=\"44\" fill=\"url(#splMetalDark)\" stroke=\"#1E293B\" stroke-width=\"1.2\"\/>\n                <!-- spline teeth around circumference (24 teeth, simplified) -->\n                <g fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\".7\">\n                  <!-- generated radial small rectangles -->\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(0 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(15 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(30 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(45 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(60 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(75 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(90 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(105 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(120 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(135 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(150 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(165 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(180 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(195 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(210 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(225 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(240 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(255 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(270 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(285 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(300 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(315 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(330 0 0)\"\/>\n                  <rect x=\"-3\" y=\"-52\" width=\"6\" height=\"9\" transform=\"rotate(345 0 0)\"\/>\n                <\/g>\n                <!-- pitch circle (dashed yellow) -->\n                <circle cx=\"0\" cy=\"0\" r=\"48\" fill=\"none\" stroke=\"#FCD34D\" stroke-width=\".5\" stroke-dasharray=\"3 2\" opacity=\".7\"\/>\n                <!-- center bore -->\n                <circle cx=\"0\" cy=\"0\" r=\"14\" fill=\"#0F172A\" stroke=\"#1E293B\" stroke-width=\"1\"\/>\n                <!-- centerlines -->\n                <line x1=\"-58\" y1=\"0\" x2=\"58\" y2=\"0\" stroke=\"#FCD34D\" stroke-width=\".6\" stroke-dasharray=\"6 2 2 2\" opacity=\".6\"\/>\n                <line x1=\"0\" y1=\"-58\" x2=\"0\" y2=\"58\" stroke=\"#FCD34D\" stroke-width=\".6\" stroke-dasharray=\"6 2 2 2\" opacity=\".6\"\/>\n                <!-- over-pin indicator: two small circles at opposite spaces -->\n                <circle cx=\"0\" cy=\"-48\" r=\"3.2\" fill=\"none\" stroke=\"#22C55E\" stroke-width=\".9\"\/>\n                <circle cx=\"0\" cy=\"48\" r=\"3.2\" fill=\"none\" stroke=\"#22C55E\" stroke-width=\".9\"\/>\n                <line x1=\"0\" y1=\"-48\" x2=\"0\" y2=\"48\" stroke=\"#22C55E\" stroke-width=\".5\" stroke-dasharray=\"2 2\" opacity=\".7\"\/>\n                <text x=\"0\" y=\"84\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"#22C55E\" text-anchor=\"middle\">M_PIN MEASUREMENT<\/text>\n              <\/g>\n\n              <!-- \u2550\u2550\u2550 BOTTOM RIGHT: tooth profile detail (close-up) \u2550\u2550\u2550 -->\n              <g transform=\"translate(220,200)\">\n                <!-- detail bracket -->\n                <rect x=\"0\" y=\"0\" width=\"220\" height=\"120\" fill=\"rgba(15,23,42,.4)\" stroke=\"#475569\" stroke-width=\"1\" stroke-dasharray=\"4 3\" rx=\"6\"\/>\n                <text x=\"10\" y=\"14\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"rgba(255,255,255,.55)\" letter-spacing=\"1\">DETAIL A \u00b7 INVOLUTE TOOTH<\/text>\n\n                <!-- enlarged spline tooth profile -->\n                <g transform=\"translate(110,70)\">\n                  <!-- root line -->\n                  <line x1=\"-90\" y1=\"20\" x2=\"90\" y2=\"20\" stroke=\"#94A3B8\" stroke-width=\"1\"\/>\n                  <!-- two adjacent teeth (involute-like outline) -->\n                  <path d=\"M -70,20 L -64,-6 Q -58,-22 -50,-22 Q -42,-22 -36,-6 L -30,20 L -10,20 L -4,-6 Q 2,-22 10,-22 Q 18,-22 24,-6 L 30,20 L 50,20 L 56,-6 Q 62,-22 70,-22 Q 78,-22 84,-6 L 90,20\"\n                        fill=\"url(#splMetal)\" stroke=\"#1E293B\" stroke-width=\"1.1\"\/>\n                  <!-- pressure angle indicator on middle tooth left flank -->\n                  <line x1=\"-4\" y1=\"-6\" x2=\"-30\" y2=\"20\" stroke=\"#60A5FA\" stroke-width=\".7\" opacity=\".7\"\/>\n                  <line x1=\"-4\" y1=\"-6\" x2=\"-4\" y2=\"20\" stroke=\"#60A5FA\" stroke-width=\".5\" stroke-dasharray=\"2 2\" opacity=\".7\"\/>\n                  <text x=\"-18\" y=\"14\" font-family=\"Roboto Mono,monospace\" font-size=\"7\" fill=\"#93C5FD\">30\u00b0<\/text>\n                  <!-- root fillet highlight -->\n                  <circle cx=\"-30\" cy=\"20\" r=\"3\" fill=\"none\" stroke=\"#FCD34D\" stroke-width=\".6\" opacity=\".8\"\/>\n                  <text x=\"-30\" y=\"38\" font-family=\"Roboto Mono,monospace\" font-size=\"6\" fill=\"#FCD34D\" text-anchor=\"middle\">ROOT FILLET<\/text>\n                  <!-- tooth tip dimension -->\n                  <line x1=\"-50\" y1=\"-32\" x2=\"10\" y2=\"-32\" stroke=\"#60A5FA\" stroke-width=\".6\" opacity=\".7\"\/>\n                  <path d=\"M-50,-32 l3,-2 l0,4 z\" fill=\"#60A5FA\"\/>\n                  <path d=\"M10,-32 l-3,-2 l0,4 z\" fill=\"#60A5FA\"\/>\n                  <text x=\"-20\" y=\"-37\" font-family=\"Roboto Mono,monospace\" font-size=\"7\" fill=\"#93C5FD\" text-anchor=\"middle\">PITCH<\/text>\n                <\/g>\n              <\/g>\n\n              <!-- top-right scale legend -->\n              <text x=\"468\" y=\"32\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"rgba(255,255,255,.4)\" text-anchor=\"end\" letter-spacing=\"1\">SCALE 1 : 2 \u00b7 MM<\/text>\n            <\/svg>\n          <\/div>\n\n          <div class=\"hxc-hero2-chips\">\n            <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">DIN 5480 \u00b7 ISO 4156 \u00b7 ANSI B92.1<\/div><div class=\"hxc-hero2-chip-l\">Standards<\/div><\/div>\n            <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">Hob \u00b7 Harden \u00b7 Grind<\/div><div class=\"hxc-hero2-chip-l\">Process<\/div><\/div>\n            <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">48<span>hr<\/span> Quote \u00b7 MOQ 1<\/div><div class=\"hxc-hero2-chip-l\">Response<\/div><\/div>\n          <\/div>\n\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/section>\n\n<!-- STATS -->\n<div class=\"hxc-stats\">\n  <div class=\"hxc-sg\">\n    <div class=\"hxc-st\"><div class=\"hxc-sn\">\u00b10.005mm<\/div><div class=\"hxc-sl2\">Spline OD Tolerance<br>ground finish standard<\/div><\/div>\n    <div class=\"hxc-st\"><div class=\"hxc-sn\">\u00d86\u2013400mm<\/div><div class=\"hxc-sl2\">Diameter Range<br>solid &amp; hollow shafts<\/div><\/div>\n    <div class=\"hxc-st\"><div class=\"hxc-sn\">3 Standards<\/div><div class=\"hxc-sl2\">DIN 5480 \u00b7 ISO 4156<br>ANSI B92.1 \/ B92.2M \/ SAE<\/div><\/div>\n    <div class=\"hxc-st\"><div class=\"hxc-sn\">5 Days<\/div><div class=\"hxc-sl2\">Fastest Lead Time<br>prototype spline shafts<\/div><\/div>\n  <\/div>\n<\/div>\n\n<!-- GALLERY -->\n<div class=\"hxc-s-cd\" id=\"hxc-gal\">\n  <div class=\"hxc-inner\">\n    <div class=\"hxc-gh\">\n      <div>\n        <span class=\"hxc-ey\">Our Work<\/span>\n        <h2 class=\"hxc-h2\">Spline Shafts We've Made<\/h2>\n        <p class=\"hxc-sub\">Involute spline shafts, parallel-key &amp; straight-sided spline shafts, serrated, hollow, gear spline shafts, motor spline shafts, and hydraulic pump spline shafts \u2014 shipped from our China factory to automotive, robotics, hydraulic, and aerospace customers.<\/p>\n      <\/div>\n      <a href=\"#hxc-cta\" class=\"hxc-btn hxc-o\" style=\"flex-shrink:0\">Request Similar Part <span class=\"hxc-ar\">\u2192<\/span><\/a>\n    <\/div>\n    <div class=\"hxc-gg\">\n      <div class=\"hxc-gc hxc-a\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Spline-Shafts.webp\" alt=\"involute spline shaft 42CrMo4 automotive transmission ground DIN 5480\">\n      <\/div>\n      <div class=\"hxc-gc hxc-b\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Internal-Spline-Hubs-scaled.webp\" alt=\"stainless steel splined shaft SUS316 food grade pharmaceutical pump\">\n      <\/div>\n      <div class=\"hxc-gc hxc-c\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/robots-Spline-Shafts-Gear-Shafts.png\" alt=\"titanium spline shaft aerospace lightweight high strength robot servo\">\n      <\/div>\n      <div class=\"hxc-gc hxc-d\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Spline-Shaft-Set-for-Actuator.webp\" alt=\"robot servo spline shaft aluminum 7075 anodized low inertia precision\">\n      <\/div>\n      <div class=\"hxc-gc hxc-e\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Stainless-Spline-Shaft-\u2014-Pharma-Pump.webp\" alt=\"hollow spline shaft 20CrMnTi carburized hardened ground motor drive\">\n      <\/div>\n      <div class=\"hxc-gc hxc-f\">\n        <img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Actuator-Spline-Shaft-\u2014-Flight-Control.webp\" alt=\"hydraulic pump spline shaft SAE J498 motor coupling large diameter steel china manufacturer\">\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- \u2550\u2550\u2550 TYPES (NEW) \u2550\u2550\u2550 -->\n<style>\n.hxc-tyg{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}\n.hxc-tyc{background:#fff;border:0.5px solid var(--border,#e4e8ec);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}\n.hxc-tyc:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(31,78,121,0.08)}\n.hxc-tyi{position:relative;aspect-ratio:16\/10;background:#f5f7f9;overflow:hidden}\n.hxc-tyi img{width:100%;height:100%;object-fit:cover;display:block}\n.hxc-tyb{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}\n.hxc-tyt{font-family:var(--bd,inherit);font-size:14px;font-weight:600;color:var(--text,#1c242c);margin-bottom:8px;line-height:1.35}\n.hxc-tyd{font-size:12.5px;color:var(--muted,#6a7682);line-height:1.65;margin-bottom:14px;flex:1}\n.hxc-tytg{display:flex;flex-wrap:wrap;gap:6px}\n.hxc-tytg span{display:inline-block;padding:3px 9px;background:#f0f4f8;color:#1F4E79;font-size:10.5px;font-weight:500;border-radius:3px;letter-spacing:0.02em}\n@media(max-width:1024px){.hxc-tyg{grid-template-columns:repeat(3,1fr)}}\n@media(max-width:768px){.hxc-tyg{grid-template-columns:repeat(2,1fr);gap:14px}.hxc-tyb{padding:14px 14px 16px}}\n@media(max-width:480px){.hxc-tyg{grid-template-columns:1fr}}\n<\/style>\n\n<div class=\"hxc-s-sf\" id=\"hxc-types\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Configurations<\/span>\n    <h2 class=\"hxc-h2\">Spline Shaft Types We Manufacture<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:32px\">External involute spline shafts, parallel-sided, serrated, hollow, gear spline shafts, motor \/ servo spline shafts, hydraulic pump spline shafts, and custom shafts with splines \u2014 any configuration your design calls for.<\/p>\n\n    <div class=\"hxc-tyg\">\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Spline-Shafts.webp\" alt=\"involute spline shaft DIN 5480 ISO 4156 ANSI B92.1 external\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Involute Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">External involute splined shafts to <strong>DIN 5480 \/ ISO 4156 \/ ANSI B92.1<\/strong>. The dominant spline standard worldwide \u2014 self-centering, high torque capacity, and inspectable with standard gauges. Metric involute and inch involute, 30\u00b0 \/ 37.5\u00b0 \/ 45\u00b0 pressure angle.<\/div>\n          <div class=\"hxc-tytg\"><span>DIN 5480<\/span><span>30\u00b0 PA<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Internal-Spline-Hubs-scaled.webp\" alt=\"parallel key straight sided spline shaft DIN 5462 metric\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Parallel-Key &amp; Straight-Sided Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Straight-sided spline shafts with flat-flanked teeth per <strong>DIN 5462 \/ 5463<\/strong> \u2014 simpler to machine, lower-cost than involute. Metric parallel spline shaft profiles for machine tools, conveyors, and agricultural drives where load capacity allows.<\/div>\n          <div class=\"hxc-tytg\"><span>Parallel<\/span><span>DIN 5462<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/robots-Spline-Shafts-Gear-Shafts.png\" alt=\"serrated spline shaft fine pitch ANSI B92.2M angular position\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Serrated Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Fine-pitch serrated spline shafts with many small triangular teeth \u2014 used for indexable angular positioning (steering columns, control levers) and for permanent press-fit assemblies. Per <strong>ANSI B92.2M<\/strong> and SAE serration standards.<\/div>\n          <div class=\"hxc-tytg\"><span>Fine Pitch<\/span><span>Indexable<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Stainless-Spline-Shaft-\u2014-Pharma-Pump.webp\" alt=\"hollow spline shaft weight reduction lightweight\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Hollow Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Hollow spline shafts with internal bore for weight reduction, oil\/coolant passage, or cable routing. Common in robot joints, aerospace actuators, and modern automotive driveshafts where mass matters. Bore concentricity \u2264 0.01 mm to spline OD.<\/div>\n          <div class=\"hxc-tytg\"><span>Hollow<\/span><span>Lightweight<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Spline-Shaft-Set-for-Actuator.webp\" alt=\"gear spline shaft integrated helical bevel pinion\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Gear Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Integrated gear + spline shaft in one part \u2014 external spline at one end, helical \/ bevel \/ spur gear teeth machined directly on the shaft. The compact solution for transmission input shafts, robot joint outputs, and inline reducers. All features concentric in one setup.<\/div>\n          <div class=\"hxc-tytg\"><span>Gear + Spline<\/span><span>Integrated<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/robots-Spline-Shafts-Gear-Shafts.png\" alt=\"motor shaft spline servo precision robot drive\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Motor &amp; Servo Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Precision spline motor shafts for direct-drive servo motors, robot joints, and stepper drives. Tight runout (TIR \u2264 0.005 mm), low inertia, and the DIN 5480 grade 5 accuracy required for backlash-sensitive positioning. Spline motor shaft customization in any module and tooth count.<\/div>\n          <div class=\"hxc-tytg\"><span>Servo<\/span><span>DIN Grade 5<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Actuator-Spline-Shaft-\u2014-Flight-Control.webp\" alt=\"hydraulic pump spline shaft SAE J498 coupling motor\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Hydraulic Pump Spline Shafts<\/div>\n          <div class=\"hxc-tyd\">Hydraulic pump spline shaft couplings per <strong>SAE J498<\/strong> for hydraulic gear, vane, and piston pumps. Standard 9T-16\/32DP, 13T-16\/32DP, and 15T-16\/32DP shaft profiles in carburized 8620 or 42CrMo4 \u2014 the application HXC has supplied to OEM pump manufacturers for over a decade.<\/div>\n          <div class=\"hxc-tytg\"><span>SAE J498<\/span><span>Hydraulics<\/span><\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"hxc-tyc\">\n        <div class=\"hxc-tyi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Brass-Nuts.jpg\" alt=\"custom shaft with splines miniature brass plastic\"><\/div>\n        <div class=\"hxc-tyb\">\n          <div class=\"hxc-tyt\">Custom Shafts with Splines (Brass \/ Plastic \/ Miniature)<\/div>\n          <div class=\"hxc-tyd\">Custom shafts with splines combining unusual materials and features \u2014 brass spline shaft for instruments, plastic (POM\/PEEK) spline shaft for medical and lab equipment, miniature splines for optical drives. Any single-piece custom shaft with splines integrated.<\/div>\n          <div class=\"hxc-tytg\"><span>Brass \/ Plastic<\/span><span>Miniature<\/span><\/div>\n        <\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- CAPABILITIES (image column removed) -->\n<div class=\"hxc-s\" id=\"hxc-cap\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Technical Specs<\/span>\n    <h2 class=\"hxc-h2\">Spline Shaft Manufacturing Capabilities<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:36px\">Four precision spline shaft machining processes \u2014 hobbing, grinding, form milling, and broaching \u2014 covering every spline profile type and accuracy requirement. Full spline shaft manufacturing process from blank to ground finish under one roof.<\/p>\n    <div class=\"hxc-cw\">\n      <div class=\"hxc-csb\">\n        <div class=\"hxc-ct on\" onclick=\"hxcCap(this,'hxc-c1')\"><div class=\"hxc-ci\">\u2699\ufe0f<\/div><div><div style=\"font-size:13px;font-weight:500\">Spline Hobbing<\/div><div style=\"font-size:11px;color:var(--muted);margin-top:1px\">High-volume production<\/div><\/div><\/div>\n        <div class=\"hxc-ct\" onclick=\"hxcCap(this,'hxc-c2')\"><div class=\"hxc-ci\">\ud83d\udd2c<\/div><div><div style=\"font-size:13px;font-weight:500\">Spline Grinding<\/div><div style=\"font-size:11px;color:var(--muted);margin-top:1px\">Post-hardening precision<\/div><\/div><\/div>\n        <div class=\"hxc-ct\" onclick=\"hxcCap(this,'hxc-c3')\"><div class=\"hxc-ci\">\ud83c\udfed<\/div><div><div style=\"font-size:13px;font-weight:500\">5-Axis CNC Milling<\/div><div style=\"font-size:11px;color:var(--muted);margin-top:1px\">Prototype &amp; complex<\/div><\/div><\/div>\n        <div class=\"hxc-ct\" onclick=\"hxcCap(this,'hxc-c4')\"><div class=\"hxc-ci\">\ud83d\udcd0<\/div><div><div style=\"font-size:13px;font-weight:500\">OD &amp; Profile Grinding<\/div><div style=\"font-size:11px;color:var(--muted);margin-top:1px\">Journal &amp; spline finish<\/div><\/div><\/div>\n      <\/div>\n      <div class=\"hxc-cb on\" id=\"hxc-c1\">\n        <div class=\"hxc-ctx\">\n          <div class=\"hxc-cttl\">Spline Shaft Hobbing<\/div>\n          <div class=\"hxc-cdesc\">CNC spline shaft hobbing generates external involute spline profiles in a continuous, fast process \u2014 the standard method of machining splines on shafts in production quantities. One hob cuts all teeth simultaneously across the spline length. Ideal for DIN 5480, ISO 4156, and ANSI B92.1 involute spline shafts before heat treatment and final grinding.<\/div>\n          <table class=\"hxc-tbl\">\n            <tr><td>Spline OD range<\/td><td>\u00d88 \u2013 250 mm<\/td><\/tr>\n            <tr><td>Module range<\/td><td>0.5 \u2013 10 mm<\/td><\/tr>\n            <tr><td>Max spline length<\/td><td>800 mm<\/td><\/tr>\n            <tr><td>Tooth profile<\/td><td>Involute (30\u00b0, 37.5\u00b0, 45\u00b0 PA)<\/td><\/tr>\n            <tr><td>Standards<\/td><td>DIN 5480 \u00b7 ISO 4156 \u00b7 ANSI B92.1<\/td><\/tr>\n            <tr><td>Quality (pre-grind)<\/td><td>DIN 5480 grade 7\u20139<\/td><\/tr>\n            <tr><td>Typical quantity<\/td><td>100 \u2013 20,000 pcs<\/td><\/tr>\n            <tr><td>Lead time<\/td><td>7 \u2013 12 days<\/td><\/tr>\n          <\/table>\n        <\/div>\n      <\/div>\n      <div class=\"hxc-cb\" id=\"hxc-c2\">\n        <div class=\"hxc-ctx\">\n          <div class=\"hxc-cttl\">Post-Hardening Spline Shaft Grinding<\/div>\n          <div class=\"hxc-cdesc\">After induction hardening or carburizing, spline shaft teeth are profile-ground to restore the involute geometry distorted by heat treatment. Achieves tight tooth thickness tolerances (DIN 5480 grade 5\u20136), correct over-pin measurement, and Ra \u2264 0.4 \u00b5m on the tooth flanks. Essential for automotive transmission and aerospace spline shafts where backlash and fatigue life are critical.<\/div>\n          <table class=\"hxc-tbl\">\n            <tr><td>Spline OD range<\/td><td>\u00d810 \u2013 180 mm<\/td><\/tr>\n            <tr><td>Quality grade<\/td><td>DIN 5480 grade 5\u20136 <span class=\"hxc-hi\">precision<\/span><\/td><\/tr>\n            <tr><td>Tooth thickness tol.<\/td><td>\u00b10.005 mm<\/td><\/tr>\n            <tr><td>Surface finish Ra<\/td><td>0.2 \u2013 0.4 \u00b5m<\/td><\/tr>\n            <tr><td>Post heat treatment<\/td><td>Yes \u2014 induction or carburized<\/td><\/tr>\n            <tr><td>Runout (OD)<\/td><td>\u2264 0.008 mm TIR<\/td><\/tr>\n            <tr><td>Lead time<\/td><td>10 \u2013 18 days<\/td><\/tr>\n          <\/table>\n        <\/div>\n      <\/div>\n      <div class=\"hxc-cb\" id=\"hxc-c3\">\n        <div class=\"hxc-ctx\">\n          <div class=\"hxc-cttl\">5-Axis CNC Milling \u2014 Prototype &amp; Special Profiles<\/div>\n          <div class=\"hxc-cdesc\">5-axis milling generates spline profiles on shafts with complex features \u2014 offset splines, interrupted splines, non-standard tooth forms, gear spline shafts, and shafts with integrated flanges or bores. Ideal for prototype quantities (1\u201320 pcs), customized spline shaft designs, or special spline forms not covered by standard hob tooling.<\/div>\n          <table class=\"hxc-tbl\">\n            <tr><td>Spline OD range<\/td><td>\u00d86 \u2013 400 mm<\/td><\/tr>\n            <tr><td>Tooth form<\/td><td>Involute, parallel, serrated, custom<\/td><\/tr>\n            <tr><td>Standards<\/td><td>Any \u2014 DIN, ISO, ANSI, customer<\/td><\/tr>\n            <tr><td>Integrated features<\/td><td>Flanges, bores, threads, keyways<\/td><\/tr>\n            <tr><td>MOQ<\/td><td>1 pc<\/td><\/tr>\n            <tr><td>Lead time (proto)<\/td><td>5 \u2013 10 days<\/td><\/tr>\n            <tr><td>Materials<\/td><td>All metals + engineering plastics<\/td><\/tr>\n          <\/table>\n        <\/div>\n      <\/div>\n      <div class=\"hxc-cb\" id=\"hxc-c4\">\n        <div class=\"hxc-ctx\">\n          <div class=\"hxc-cttl\">OD Cylindrical Grinding<\/div>\n          <div class=\"hxc-cdesc\">Journal diameters, bearing seats, and spline OD are cylindrically ground in the same setup as spline tooth grinding \u2014 ensuring concentricity between all diameters. Critical for spline shafts that run in precision bearings where runout must be held to \u2264 0.005 mm TIR.<\/div>\n          <table class=\"hxc-tbl\">\n            <tr><td>Diameter range<\/td><td>\u00d86 \u2013 300 mm<\/td><\/tr>\n            <tr><td>Max length<\/td><td>1,200 mm<\/td><\/tr>\n            <tr><td>Roundness<\/td><td>\u2264 0.002 mm<\/td><\/tr>\n            <tr><td>Cylindricity<\/td><td>\u2264 0.003 mm \/ 100 mm<\/td><\/tr>\n            <tr><td>Runout (to spline)<\/td><td>\u2264 0.005 mm TIR<\/td><\/tr>\n            <tr><td>Surface finish Ra<\/td><td>0.2 \u2013 0.8 \u00b5m (to spec)<\/td><\/tr>\n            <tr><td>Lead time<\/td><td>Added to spline process \u2014 no extra<\/td><\/tr>\n          <\/table>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- MATERIALS -->\n<div class=\"hxc-s-sf\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Materials<\/span>\n    <h2 class=\"hxc-h2\">50+ Certified Materials<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:28px\">Full mill certificates and spectral analysis on every batch \u2014 spline shaft materials in steel, stainless, aluminum, brass, bronze, and engineering plastics.<\/p>\n    <div class=\"hxc-mts\">\n      <div class=\"hxc-mtt on\" onclick=\"hxcMat(this,'hxc-met')\">Metals<\/div>\n      <div class=\"hxc-mtt\" onclick=\"hxcMat(this,'hxc-pla')\">Engineering Plastics<\/div>\n    <\/div>\n    <div id=\"hxc-met\" class=\"hxc-mg\">\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Passivation-Stainless-Steel-scaled.webp\" alt=\"20CrMnTi case hardened steel spline shaft\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">20CrMnTi Steel<\/div><div class=\"hxc-mp\">Case-hardened, HRC 58\u201362 surface. The default carburized steel spline shaft for automotive transmissions and high-torque drives.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">High Load<\/span><span class=\"hxc-mtg\">Carburized<\/span><span class=\"hxc-mtg\">Automotive<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Alloy-Steel-CNC.jpg\" alt=\"42CrMo4 alloy steel spline shaft induction hardened\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">42CrMo4 Alloy Steel<\/div><div class=\"hxc-mp\">Induction-hardened, HRC 52\u201358. Standard steel spline shaft material for transmission input shafts and hydraulic pump spline shafts.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Induction<\/span><span class=\"hxc-mtg\">Fatigue-Res.<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/aluminum-spur-gears-factories-scaled.webp\" alt=\"aluminum 6061 7075 spline shaft lightweight robot\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">Al 6061-T6 \/ 7075<\/div><div class=\"hxc-mp\">Lightweight aluminum spline shafts, hard-anodizable. Customized aluminum spline shaft solutions for robot joints, drones, and aerospace actuators.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Lightweight<\/span><span class=\"hxc-mtg\">Anodizable<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Brass-Nuts.jpg\" alt=\"C36000 brass spline shaft instrument low noise\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">C36000 Brass<\/div><div class=\"hxc-mp\">Free-machining brass spline shafts for instruments, optical drives, and small precision mechanisms where low noise and corrosion resistance matter.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Low Noise<\/span><span class=\"hxc-mtg\">Corrosion-Res.<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Brass-Nuts.jpg\" alt=\"phosphor bronze spline shaft self lubricating wear\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">Phosphor Bronze<\/div><div class=\"hxc-mp\">Self-lubricating against steel mate. Bronze spline shafts excel as wear-resistant elements in slow-speed sliding spline applications.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Self-Lubricating<\/span><span class=\"hxc-mtg\">Wear-Res.<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Martensitic-Stainless-Steel-420.jpg\" alt=\"SUS316L stainless steel spline shaft food pharma marine\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">SUS304 \/ 316L Stainless<\/div><div class=\"hxc-mp\">Stainless steel splined shafts \u2014 food, pharma, marine, and cleanroom applications. Passivated for full corrosion immunity. SUS630 (17-4PH) for combined strength + corrosion resistance.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Food \/ Pharma<\/span><span class=\"hxc-mtg\">Marine<\/span><\/div><\/div><\/div>\n    <\/div>\n    <div id=\"hxc-pla\" class=\"hxc-mg\" style=\"display:none\">\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/POM-Plastic-Gears.webp\" alt=\"POM Delrin plastic spline shaft self lubricating\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">POM (Delrin)<\/div><div class=\"hxc-mp\">Self-lubricating Delrin plastic spline shaft, low friction, often run dry. The default plastic spline shaft for service robots, consumer products, and quiet drives.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">Self-lubricated<\/span><span class=\"hxc-mtg\">Low Noise<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/Nylon-Gears.webp\" alt=\"nylon PA66 plastic spline shaft glass filled\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">Nylon PA66-GF30<\/div><div class=\"hxc-mp\">30% glass-filled nylon plastic spline shaft with higher load capacity than POM. Machined plastic splines for tooth precision rather than moulded.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">High Strength<\/span><span class=\"hxc-mtg\">Lightweight<\/span><\/div><\/div><\/div>\n      <div class=\"hxc-mc\"><div class=\"hxc-mci\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/04\/peek.jpg\" alt=\"PEEK plastic spline shaft high temperature medical sterilizable\"><\/div><div class=\"hxc-mif\"><div class=\"hxc-mn\">PEEK<\/div><div class=\"hxc-mp\">High-temperature PEEK plastic spline shaft, rated to 260\u00b0C. Chemical-resistant, sterilizable for surgical robots and lab instruments.<\/div><div class=\"hxc-mtgs\"><span class=\"hxc-mtg\">High Temp<\/span><span class=\"hxc-mtg\">Sterilizable<\/span><\/div><\/div><\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- \u2550\u2550\u2550 SPECIFICATIONS (NEW) \u2550\u2550\u2550 -->\n<style>\n.hxc-spg{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:8px}\n.hxc-spc{background:#fff;border:0.5px solid var(--border,#e4e8ec);border-radius:8px;padding:24px 26px}\n.hxc-spt{font-family:var(--bd,inherit);font-size:14px;font-weight:600;color:var(--primary,#1F4E79);margin-bottom:12px;display:flex;align-items:center;gap:8px}\n.hxc-spi{width:22px;height:22px;border-radius:4px;background:#f0f4f8;display:inline-flex;align-items:center;justify-content:center;font-size:12px;line-height:1}\n.hxc-spd{font-size:12.5px;color:var(--muted,#6a7682);line-height:1.75;margin-bottom:14px}\n.hxc-spd strong{color:var(--text,#1c242c);font-weight:500}\n.hxc-sptbl{width:100%;border-collapse:collapse;font-size:12px;margin-bottom:4px}\n.hxc-sptbl th{background:#f5f7f9;text-align:left;padding:7px 10px;font-weight:500;color:var(--text,#1c242c);border-bottom:0.5px solid var(--border,#e4e8ec)}\n.hxc-sptbl td{padding:7px 10px;border-bottom:0.5px solid var(--border,#e4e8ec);color:var(--muted,#6a7682);vertical-align:top}\n.hxc-sptbl tr:last-child td{border-bottom:none}\n.hxc-sptbl td strong{color:var(--text,#1c242c);font-weight:500}\n.hxc-spform{font-family:'Courier New',monospace;font-size:13px;background:#f5f7f9;border-left:3px solid #1F4E79;padding:10px 14px;margin:8px 0 12px;border-radius:0 4px 4px 0;color:var(--text,#1c242c)}\n@media(max-width:768px){.hxc-spg{grid-template-columns:1fr;gap:16px}.hxc-spc{padding:20px 22px}}\n<\/style>\n\n<div class=\"hxc-s\" id=\"hxc-specs\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Reference<\/span>\n    <h2 class=\"hxc-h2\">Spline Shaft Standard Specifications<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:32px\">Module, pressure angle, fit class, tolerances \u2014 the standard metric spline shaft dimensions and ANSI\/SAE equivalents every drawing should define. A working reference for engineers preparing CAD, RFQs, and spline shaft quotes.<\/p>\n\n    <div class=\"hxc-spg\">\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\ud83d\udccf<\/span>Spline Shaft Module Chart (DIN 5480 Metric)<\/div>\n        <div class=\"hxc-spd\">Per <strong>DIN 5480 \/ ISO 4156<\/strong>, standard metric spline shaft dimensions follow this module series. The 30\u00b0 pressure angle is standard across the full range:<\/div>\n        <table class=\"hxc-sptbl\">\n          <tr><th>Module (mn)<\/th><th>Common Z range<\/th><th>Typical Use<\/th><\/tr>\n          <tr><td><strong>0.5, 0.75, 1<\/strong><\/td><td>14 \u2013 60<\/td><td>Miniature, instruments, servo motor splines<\/td><\/tr>\n          <tr><td><strong>1.25, 1.5, 1.75, 2<\/strong><\/td><td>14 \u2013 50<\/td><td>Robot joints, small transmissions<\/td><\/tr>\n          <tr><td><strong>2.5, 3, 4, 5<\/strong><\/td><td>14 \u2013 40<\/td><td>Automotive transmissions, industrial drives<\/td><\/tr>\n          <tr><td><strong>6, 8, 10<\/strong><\/td><td>14 \u2013 30<\/td><td>Heavy industrial, agricultural, marine<\/td><\/tr>\n        <\/table>\n      <\/div>\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\u2220<\/span>Spline Shaft Pressure Angle<\/div>\n        <div class=\"hxc-spd\">Spline shaft pressure angle is higher than for gears \u2014 gives wider tooth root and better load distribution. Standard options:<\/div>\n        <table class=\"hxc-sptbl\">\n          <tr><th>Pressure Angle<\/th><th>Standard<\/th><th>Notes<\/th><\/tr>\n          <tr><td><strong>30\u00b0<\/strong><\/td><td>DIN 5480, ISO 4156<\/td><td>European standard \u2014 default for new designs<\/td><\/tr>\n          <tr><td><strong>30\u00b0 \/ 37.5\u00b0 \/ 45\u00b0<\/strong><\/td><td>ANSI B92.1<\/td><td>American series \u2014 45\u00b0 gives strongest root<\/td><\/tr>\n          <tr><td>20\u00b0<\/td><td>Fine-pitch ANSI<\/td><td>Rare \u2014 high tooth count, thin teeth<\/td><\/tr>\n          <tr><td>Serrated<\/td><td>SAE J499 \/ ANSI B92.2M<\/td><td>60\u00b0 flat-flank for indexable position<\/td><\/tr>\n        <\/table>\n      <\/div>\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\ud83d\udd27<\/span>Fit Class &amp; Tolerances (DIN 5480)<\/div>\n        <div class=\"hxc-spd\">DIN 5480 spline shaft tolerances are specified by tooth-thickness tolerance class. Match the shaft class to a complementary hub class:<\/div>\n        <table class=\"hxc-sptbl\">\n          <tr><th>Shaft Class<\/th><th>Fit Type<\/th><th>Application<\/th><\/tr>\n          <tr><td>e, f, g<\/td><td><strong>Sliding fit<\/strong><\/td><td>Axial motion required \u2014 transmission slip yokes<\/td><\/tr>\n          <tr><td>h, js<\/td><td>Close sliding \/ locational<\/td><td>Fixed coupling with easy assembly<\/td><\/tr>\n          <tr><td>k, n<\/td><td><strong>Press fit<\/strong><\/td><td>Permanent assembly, no maintenance<\/td><\/tr>\n        <\/table>\n      <\/div>\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\u0192<\/span>Key Spline Shaft Formulas<\/div>\n        <div class=\"hxc-spd\"><strong>Spline shaft pitch diameter<\/strong> (the reference circle for involute spline geometry):<\/div>\n        <div class=\"hxc-spform\">d = mn \u00d7 z &nbsp; (metric DIN 5480)<\/div>\n        <div class=\"hxc-spd\"><strong>Spline OD<\/strong> for external splines: da \u2248 mn \u00d7 (z + 1) \u2014 actual value per fit class. <strong>Over-pin measurement<\/strong> M_pin uses precision pins of known diameter placed in opposing tooth spaces. Span measured with micrometer:<\/div>\n        <div class=\"hxc-spform\">M_pin = d + 2 \u00d7 (inv \u03b1 + s\/d \u2212 \u03c0\/z) \u00d7 ... (see DIN 5480-1)<\/div>\n      <\/div>\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\u2713<\/span>Spline Shaft Standards Cross-Reference<\/div>\n        <div class=\"hxc-spd\">Choose the standard based on geography and end-application. HXC produces to all four:<\/div>\n        <table class=\"hxc-sptbl\">\n          <tr><th>Standard<\/th><th>Region \/ Use<\/th><th>Profile<\/th><\/tr>\n          <tr><td><strong>DIN 5480<\/strong><\/td><td>European industrial &amp; automotive<\/td><td>Involute, metric, 30\u00b0 PA<\/td><\/tr>\n          <tr><td><strong>ISO 4156<\/strong><\/td><td>International (\u2248 DIN 5480)<\/td><td>Involute, metric, 30\u00b0 PA<\/td><\/tr>\n          <tr><td><strong>ANSI B92.1 \/ B92.2M<\/strong><\/td><td>North America<\/td><td>Involute, inch DP \/ metric, 30\u00b0-45\u00b0 PA<\/td><\/tr>\n          <tr><td><strong>SAE J498 \/ J499<\/strong><\/td><td>Hydraulic pumps, ag equip.<\/td><td>Involute &amp; serrated, inch DP<\/td><\/tr>\n        <\/table>\n      <\/div>\n\n      <div class=\"hxc-spc\">\n        <div class=\"hxc-spt\"><span class=\"hxc-spi\">\ud83d\udcd0<\/span>Spline Shaft Drawing &amp; GD&amp;T Checklist<\/div>\n        <div class=\"hxc-spd\">A complete splined shaft engineering drawing must specify every item below. Spline shaft GD&amp;T (concentricity, runout, perpendicularity) should reference the bearing journals as datum:<\/div>\n        <table class=\"hxc-sptbl\">\n          <tr><td>\u2022 Standard (DIN 5480 \/ ISO 4156 \/ ANSI)<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Module (mn) or DP, tooth count (z)<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Pressure angle (default 30\u00b0)<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 <strong>Fit class<\/strong> (e.g. 9H \/ 9e)<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Spline OD, pitch dia, root dia<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Spline length &amp; chamfers<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Runout (to journal datum)<\/td><td><strong>Required<\/strong><\/td><\/tr>\n          <tr><td>\u2022 Surface finish on flanks (Ra)<\/td><td>Recommended<\/td><\/tr>\n          <tr><td>\u2022 Material, heat treatment, hardness<\/td><td><strong>Required<\/strong><\/td><\/tr>\n        <\/table>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- \u2550\u2550\u2550 WHY CHOOSE HXC (NEW) \u2550\u2550\u2550 -->\n<style>\n.hxc-wcg{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}\n.hxc-wcc{background:#fff;border:0.5px solid var(--border,#e4e8ec);border-radius:8px;padding:24px 22px 22px;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}\n.hxc-wcc:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(31,78,121,0.08)}\n.hxc-wci{width:42px;height:42px;border-radius:8px;background:#f0f4f8;display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:14px;color:#1F4E79;line-height:1}\n.hxc-wct{font-family:var(--bd,inherit);font-size:13.5px;font-weight:600;color:var(--text,#1c242c);margin-bottom:10px;line-height:1.4}\n.hxc-wcd{font-size:12px;color:var(--muted,#6a7682);line-height:1.7;flex:1}\n.hxc-wcd strong{color:var(--text,#1c242c);font-weight:500}\n@media(min-width:769px) and (max-width:1024px){.hxc-wcg{grid-template-columns:repeat(2,1fr)}}\n@media(max-width:768px){.hxc-wcg{grid-template-columns:1fr;gap:14px}.hxc-wcc{padding:20px 22px}}\n<\/style>\n\n<div class=\"hxc-s-sf\" id=\"hxc-why\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Why HXC<\/span>\n    <h2 class=\"hxc-h2\">Why Choose HXC as Your Spline Shaft Manufacturer<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:32px\">A China CNC spline shaft factory with in-house hobbing, induction hardening, profile grinding, and 100% gauged inspection \u2014 direct factory pricing, customized spline shaft quotation in 48 hours, no middleman.<\/p>\n\n    <div class=\"hxc-wcg\">\n\n      <div class=\"hxc-wcc\">\n        <div class=\"hxc-wci\">\ud83c\udfed<\/div>\n        <div class=\"hxc-wct\">China CNC Spline Shaft Factory in Dongguan<\/div>\n        <div class=\"hxc-wcd\">Our HXC CNC spline shaft factory in <strong>Dongguan, China<\/strong> runs spline hobbing centres, induction hardening cells, profile grinders, and a Zeiss CMM + Klingelnberg lab \u2014 the full spline shaft manufacturing process in one facility. <strong>Made in China since 2008<\/strong>, exporting to 35+ countries as a direct china cnc spline shaft manufacturer.<\/div>\n      <\/div>\n\n      <div class=\"hxc-wcc\">\n        <div class=\"hxc-wci\">\ud83d\udcac<\/div>\n        <div class=\"hxc-wct\">Customized Spline Shaft Quotation in 48h<\/div>\n        <div class=\"hxc-wcd\">Send your drawing \u2014 we return a <strong>customized spline shaft quotation<\/strong> with material, process, fit class, lead time, and unit price. Manufacturer quotation direct from our engineering team \u2014 no salesman handoff, no middleman markup on spline shaft quotes or parts processing quotes.<\/div>\n      <\/div>\n\n      <div class=\"hxc-wcc\">\n        <div class=\"hxc-wci\">\u2699\ufe0f<\/div>\n        <div class=\"hxc-wct\">Application Specialist \u2014 All Spline Shaft Types<\/div>\n        <div class=\"hxc-wcd\">Hydraulic pump spline shaft manufacturer (SAE J498), gear spline shaft supplier (integrated gear + spline), hollow spline shaft manufacturer (lightweight robot joints), precision spline motor shaft producer \u2014 all under one roof. One factory, every spline application.<\/div>\n      <\/div>\n\n      <div class=\"hxc-wcc\">\n        <div class=\"hxc-wci\">\ud83e\uddea<\/div>\n        <div class=\"hxc-wct\">Full Material Range \u00b7 MOQ 1 pc<\/div>\n        <div class=\"hxc-wcd\">Steel spline shaft manufacturers, stainless steel splined shaft suppliers, aluminum spline shaft manufacturers, brass, bronze, plus plastic (POM \/ PEEK) \u2014 one source for all materials. Customized cnc spline shaft from 1-piece prototype to 20,000-piece production with no tooling fee for standard modules.<\/div>\n      <\/div>\n\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- CASE STUDIES -->\n<div class=\"hxc-s\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Case Studies<\/span>\n    <h2 class=\"hxc-h2\">Real Spline Shaft Projects<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:36px\">From automotive transmission input shafts to robot joint spline shafts \u2014 verified results from our China factory customers.<\/p>\n    <div class=\"hxc-casg\">\n      <div class=\"hxc-casc hxc-rv\">\n        <div class=\"hxc-casi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Transmission-Input-Spline-Shaft.webp\" alt=\"Automotive transmission input spline shaft 42CrMo4 induction hardened ground DIN 5480\"><div class=\"hxc-casl\">Automotive<\/div><\/div>\n        <div class=\"hxc-casb\">\n          <div class=\"hxc-cast\">Transmission Input Spline Shaft<\/div>\n          <div class=\"hxc-casm\">\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Material<\/div><div class=\"hxc-v\">42CrMo4<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Spline OD<\/div><div class=\"hxc-v\">\u00d845mm \/ 30T<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Standard<\/div><div class=\"hxc-v\">DIN 5480<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Qty<\/div><div class=\"hxc-v\">2,000 pcs<\/div><\/div>\n          <\/div>\n          <div class=\"hxc-casr\">\u2713 Grade 6 \u00b7 Induction hardened \u00b7 Tooth thickness \u00b10.006 mm \u00b7 100% gauge checked<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"hxc-casc hxc-rv\">\n        <div class=\"hxc-casi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Actuator-Spline-Shaft-\u2014-Flight-Control.webp\" alt=\"Titanium spline shaft aerospace actuator ANSI B92.1 precision lightweight\"><div class=\"hxc-casl\">Aerospace<\/div><\/div>\n        <div class=\"hxc-casb\">\n          <div class=\"hxc-cast\">Actuator Spline Shaft \u2014 Flight Control<\/div>\n          <div class=\"hxc-casm\">\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Material<\/div><div class=\"hxc-v\">Ti Grade 5<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Spline OD<\/div><div class=\"hxc-v\">\u00d818mm<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Standard<\/div><div class=\"hxc-v\">ANSI B92.1<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Qty<\/div><div class=\"hxc-v\">30 pcs<\/div><\/div>\n          <\/div>\n          <div class=\"hxc-casr\">\u2713 Shot peened \u00b7 Full CMM \u00b7 FAI approved first article<\/div>\n        <\/div>\n      <\/div>\n      <div class=\"hxc-casc hxc-rv\">\n        <div class=\"hxc-casi\"><img decoding=\"async\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Stainless-Spline-Shaft-\u2014-Pharma-Pump.webp\" alt=\"SUS316L stainless spline shaft pharmaceutical pump food grade passivated\"><div class=\"hxc-casl\">Pharma \/ Food<\/div><\/div>\n        <div class=\"hxc-casb\">\n          <div class=\"hxc-cast\">Stainless Spline Shaft \u2014 Pharma Pump<\/div>\n          <div class=\"hxc-casm\">\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Material<\/div><div class=\"hxc-v\">SUS316L<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Standard<\/div><div class=\"hxc-v\">ISO 4156<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Finish<\/div><div class=\"hxc-v\">Passivated<\/div><\/div>\n            <div class=\"hxc-kv\"><div class=\"hxc-k\">Qty<\/div><div class=\"hxc-v\">150 pcs<\/div><\/div>\n          <\/div>\n          <div class=\"hxc-casr\">\u2713 Ra 0.4\u00b5m on flanks \u00b7 Full material cert \u00b7 FDA-compatible<\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- PROCESS -->\n<div class=\"hxc-s-sf\">\n  <div class=\"hxc-inner\">\n    <div style=\"text-align:center\">\n      <span class=\"hxc-ey\">How It Works<\/span>\n      <h2 class=\"hxc-h2\" style=\"margin:0 auto 10px\">From Drawing to Ground Spline Shaft<\/h2>\n      <p class=\"hxc-sub\" style=\"margin:0 auto\">Upload your spline shaft drawing \u2014 include spline standard, module\/pitch, tooth count, pressure angle, and fit class. We handle the rest from our China factory.<\/p>\n    <\/div>\n    <div class=\"hxc-psg\">\n      <div class=\"hxc-ps\"><div class=\"hxc-psn\">01<\/div><div class=\"hxc-pst\">Upload Drawing<\/div><div class=\"hxc-psd\">DIN 5480, ISO 4156, ANSI B92.1, SAE J498 or custom. Include spline OD, module, Z, PA, and fit class.<\/div><\/div>\n      <div class=\"hxc-ps\"><div class=\"hxc-psn\">02<\/div><div class=\"hxc-pst\">Customized Quotation in 48 Hours<\/div><div class=\"hxc-psd\">Manufacturer quotation direct from our engineering team \u2014 hobbing vs grinding recommendation, material, surface treatment, lead time, and factory pricing.<\/div><\/div>\n      <div class=\"hxc-ps\"><div class=\"hxc-psn\">03<\/div><div class=\"hxc-pst\">Hob \u2192 Harden \u2192 Grind<\/div><div class=\"hxc-psd\">Spline hobbing, heat treatment, tooth grinding, OD grinding \u2014 all in one production cell, no outsourcing.<\/div><\/div>\n      <div class=\"hxc-ps\"><div class=\"hxc-psn\">04<\/div><div class=\"hxc-pst\">Gauge &amp; CMM Check, Ship<\/div><div class=\"hxc-psd\">100% go\/no-go spline gauge + CMM over-pin measurement. Full report shipped with every order from China.<\/div><\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- QUALITY -->\n<div class=\"hxc-s\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">Quality<\/span>\n    <h2 class=\"hxc-h2\">Zero-Defect Commitment<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:36px\">Every spline shaft leaving our China factory is 100% go\/no-go gauge checked and CMM over-pin measured before shipment. No sampling \u2014 every piece.<\/p>\n    <div class=\"hxc-qg\">\n      <div>\n        <div class=\"hxc-lbl\">Certifications &amp; Equipment<\/div>\n        <div class=\"hxc-qc\"><div class=\"hxc-qci\">\u2713<\/div><div><div class=\"hxc-qcn\">ISO 9001:2015<\/div><div class=\"hxc-qcd\">All spline shaft manufacturing processes certified \u2014 hobbing, hardening, grinding, inspection<\/div><\/div><\/div>\n        <div class=\"hxc-qc\"><div class=\"hxc-qci\">\ud83d\udcd0<\/div><div><div class=\"hxc-qcn\">DIN 5480 \/ ISO 4156 \/ ANSI B92.1<\/div><div class=\"hxc-qcd\">Spline gauges (go\/no-go) calibrated to all three standards. Over-pin\/over-ball measurement for every lot.<\/div><\/div><\/div>\n        <div class=\"hxc-qc\"><div class=\"hxc-qci\">\ud83d\udd2d<\/div><div><div class=\"hxc-qcn\">Zeiss CMM + Klingelnberg<\/div><div class=\"hxc-qcd\">CMM measures spline OD, runout, cylindricity, and positional tolerances. Klingelnberg verifies involute profile on precision-class splines.<\/div><\/div><\/div>\n        <div class=\"hxc-qc\"><div class=\"hxc-qci\">\ud83d\udcc4<\/div><div><div class=\"hxc-qcn\">Full Dimensional Report<\/div><div class=\"hxc-qcd\">Over-pin measurement, runout, surface finish, hardness \u2014 all reported and shipped with every order.<\/div><\/div><\/div>\n      <\/div>\n      <div>\n        <div class=\"hxc-lbl\">4-Stage Inspection<\/div>\n        <div class=\"hxc-qs\"><div class=\"hxc-qsn\">1<\/div><div><div class=\"hxc-qst\">Material &amp; Blank Check<\/div><div class=\"hxc-qsd\">Spectral analysis confirms alloy grade. Blank OD, length, and straightness verified before spline hobbing begins.<\/div><\/div><\/div>\n        <div class=\"hxc-qs\"><div class=\"hxc-qsn\">2<\/div><div><div class=\"hxc-qst\">Post-Hobbing Measurement<\/div><div class=\"hxc-qsd\">Over-pin measurement and visual inspection after hobbing. Any systematic tooth form error corrected before heat treatment.<\/div><\/div><\/div>\n        <div class=\"hxc-qs\"><div class=\"hxc-qsn\">3<\/div><div><div class=\"hxc-qst\">Post-Hardening Check<\/div><div class=\"hxc-qsd\">Hardness (Rockwell) and case depth verified by coupon sample after each furnace batch. Dimensional check to confirm distortion is within grind stock allowance.<\/div><\/div><\/div>\n        <div class=\"hxc-qs\"><div class=\"hxc-qsn\">4<\/div><div><div class=\"hxc-qst\">Final: 100% Gauge + CMM<\/div><div class=\"hxc-qsd\">Every finished spline shaft is 100% go\/no-go gauged and over-pin measured. CMM verifies OD runout, straightness, and key dimensions. No sampling \u2014 every piece reported.<\/div><\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- TESTIMONIALS -->\n<div class=\"hxc-s\">\n  <div class=\"hxc-inner\">\n    <div style=\"text-align:center;margin-bottom:36px\">\n      <span class=\"hxc-ey\">Reviews<\/span>\n      <h2 class=\"hxc-h2\">Trusted China Spline Shaft Manufacturer<\/h2>\n    <\/div>\n    <div class=\"hxc-tsg\">\n      <div class=\"hxc-tsi hxc-rv\">\n        <div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div>\n        <div class=\"hxc-tst\">\"2,000 pcs of DIN 5480 transmission input shafts in 42CrMo4, induction hardened and ground. HXC provided 100% gauge check reports with every lot. Zero rejections at our incoming inspection over 8 shipments. They understand transmission quality requirements.\"<\/div>\n        <div class=\"hxc-tshr\"><\/div>\n        <div class=\"hxc-tsau\"><div class=\"hxc-tsav\">MH<\/div><div><div class=\"hxc-tsnm\">Markus H.<\/div><div class=\"hxc-tsco\">Transmission Purchasing \u00b7 Germany<\/div><\/div><\/div>\n      <\/div>\n      <div class=\"hxc-tsi hxc-rv\">\n        <div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div>\n        <div class=\"hxc-tst\">\"Titanium spline shafts for our flight control actuator \u2014 ANSI B92.1, shot peened, full CMM report. Only two suppliers worldwide could meet our material and tolerance spec. HXC was faster and cheaper. FAI approved in one cycle.\"<\/div>\n        <div class=\"hxc-tshr\"><\/div>\n        <div class=\"hxc-tsau\"><div class=\"hxc-tsav\">NF<\/div><div><div class=\"hxc-tsnm\">Nicolas F.<\/div><div class=\"hxc-tsco\">Aerospace Supplier Quality \u00b7 France<\/div><\/div><\/div>\n      <\/div>\n      <div class=\"hxc-tsi hxc-rv\">\n        <div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div>\n        <div class=\"hxc-tst\">\"SUS316L spline shafts for our pharmaceutical filling machine pumps \u2014 ISO 4156, passivated, Ra 0.4\u00b5m. HXC's quality documentation was exactly what our FDA validation process required. 150 pcs delivered on time with zero NCRs.\"<\/div>\n        <div class=\"hxc-tshr\"><\/div>\n        <div class=\"hxc-tsau\"><div class=\"hxc-tsav\">KP<\/div><div><div class=\"hxc-tsnm\">Katarzyna P.<\/div><div class=\"hxc-tsco\">Mechanical Engineer \u00b7 Poland<\/div><\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<!-- FAQ -->\n<div class=\"hxc-s-sf\" id=\"hxc-faq\">\n  <div class=\"hxc-inner\">\n    <span class=\"hxc-ey\">FAQ<\/span>\n    <h2 class=\"hxc-h2\">Spline Shaft \u2014 Frequently Asked Questions<\/h2>\n    <p class=\"hxc-sub\" style=\"margin-bottom:40px\">Technical and sourcing questions about spline shafts, customized spline shaft quotations, and spline shaft manufacturing \u2014 answered by our engineers.<\/p>\n    <div class=\"hxc-faq-grid\">\n      <div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is a spline shaft?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">A spline shaft (also called a splined shaft) is a shaft with <strong>longitudinal teeth (splines) machined along its outer surface<\/strong> that mesh with matching internal splines (in a hub, sleeve, or coupling) to transmit torque while permitting axial sliding or precise angular positioning. Unlike a simple keyed shaft (one key, one keyway), a spline shaft distributes torque across multiple teeth, giving <strong>higher torque capacity, better concentricity, and lower stress concentration<\/strong>. Spline shafts are used wherever torque must be transmitted between a shaft and a sliding or fixed hub \u2014 automotive transmissions, robot joints, hydraulic pumps, and aerospace actuators.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">How much do custom spline shafts cost?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Custom spline shaft pricing depends on six variables: <strong>(1) spline OD &amp; module<\/strong> \u2014 larger and finer-pitch shafts cost more; <strong>(2) material<\/strong> \u2014 20CrMnTi carburized steel is more expensive than 42CrMo4 induction-hardened; <strong>(3) accuracy class<\/strong> \u2014 DIN 5480 grade 5 (ground) is roughly 2\u00d7 the price of grade 7 (hobbed only); <strong>(4) heat treatment<\/strong> \u2014 induction hardening + grinding adds 25\u201340%; <strong>(5) length and special features<\/strong> \u2014 long shafts, hollow shafts, and gear spline shafts cost more than simple short splines; <strong>(6) order quantity<\/strong> \u2014 prototypes cost more per unit than 100+ batches. Send your drawing for free customized spline shaft quotation \u2014 we respond within 48 hours with firm price, lead time, and spline shaft parts processing quotes.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the difference between an involute spline and a parallel-key spline?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\"><strong>Involute splines<\/strong> (covered by DIN 5480, ISO 4156, ANSI B92.1) have tooth profiles with an <strong>involute curve<\/strong> \u2014 the same profile geometry as gear teeth. This gives self-centering under load, high torque capacity, and the ability to be manufactured and inspected using the same equipment as gears. <strong>Parallel-key splines<\/strong> (DIN 5462\/5463) have straight, flat-sided teeth with a rectangular cross-section \u2014 simpler to machine but lower load capacity and no self-centering. Involute splines are preferred for automotive and aerospace applications; parallel-key splines for lighter-duty machine tool and conveyor applications.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What standards are used for spline shafts?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">The four main standards are: <strong>DIN 5480<\/strong> (German\/European) \u2014 involute splines, metric module, 30\u00b0 pressure angle, the dominant standard in European automotive and industrial applications. <strong>ISO 4156<\/strong> \u2014 closely aligned with DIN 5480 but with some differences in fit class definitions; preferred for international procurement. <strong>ANSI B92.1<\/strong> (imperial, diametral pitch) and <strong>ANSI B92.2M<\/strong> (metric) \u2014 American standards, widely used in North American automotive and hydraulic applications. <strong>SAE J498<\/strong> for hydraulic pump couplings. HXC produces spline shafts to all four standards \u2014 specify your standard and fit class on the drawing.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">How are spline shafts manufactured?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">The standard spline shaft manufacturing process for precision splines: <strong>(1) Blank turning<\/strong> \u2014 shaft OD, journals, and features machined to near-net shape with grinding stock. <strong>(2) Spline hobbing<\/strong> \u2014 involute spline teeth generated by CNC gear hobbing. <strong>(3) Heat treatment<\/strong> \u2014 induction hardening of spline zone or full carburizing, depending on application. <strong>(4) Spline tooth grinding<\/strong> \u2014 post-hardening profile grinding restores DIN 5480 grade 5\u20136 accuracy. <strong>(5) OD cylindrical grinding<\/strong> \u2014 bearing journals and datum diameters ground to final size. <strong>(6) Inspection<\/strong> \u2014 100% go\/no-go gauge and over-pin measurement.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is fretting in spline shafts and how is it prevented?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\"><strong>Fretting<\/strong> is micro-slip wear at the spline tooth contact surface \u2014 a common failure mode in spline couplings subjected to cyclic torsional loads with vibration. It produces characteristic oxidized wear debris (fretting corrosion) and can progress to fretting fatigue cracking of the tooth root. Prevention methods: <strong>(1) Tight fit class<\/strong> \u2014 reduces relative micro-motion; <strong>(2) Surface hardening<\/strong> \u2014 hard tooth flanks resist micro-slip wear; <strong>(3) Lubrication<\/strong> \u2014 spline grease (MoS\u2082 or NLGI 2) in the coupling; <strong>(4) Increased tooth count<\/strong> \u2014 distributes load over more teeth; <strong>(5) Shot peening<\/strong> \u2014 compressive stress in the root resists crack initiation.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What fit classes are available for DIN 5480 spline shafts?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">DIN 5480 defines spline fit by <strong>tolerance class and fit type<\/strong>. The shaft (external spline) is graded by tooth thickness tolerance (e.g., e, f, g for sliding fit; js for transition fit; k, n for press fit). The hub (internal spline) has a complementary grade. Common choices: <strong>Sliding fit (f\/H)<\/strong> \u2014 for splines that must slide axially or be assembled with hand force; typical in transmissions and hydraulic pump couplings. <strong>Transition fit (js\/JS)<\/strong> \u2014 for fixed couplings with some assembly tolerance. <strong>Press fit (k\/K, n\/N)<\/strong> \u2014 for permanent assemblies. Always specify both shaft and hub fit class on the drawing \u2014 mismatched classes are a frequent design error.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">How do you inspect a spline shaft?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Spline shaft inspection uses three complementary methods: <strong>(1) Go\/no-go spline gauges<\/strong> \u2014 the most practical method for production inspection. The \"go\" gauge (mating plug) verifies the total composite tolerance including tooth form, pitch, and concentricity in one functional check. The \"no-go\" gauge checks the tooth thickness is not too thin. <strong>(2) Over-pin (over-ball) measurement<\/strong> \u2014 two precision pins of known diameter placed in opposite tooth spaces and the span measured with a micrometer. Directly measures effective tooth thickness. <strong>(3) CMM with gear module<\/strong> \u2014 for precision-class splines requiring individual tooth profile, pitch, helix, and runout measurement per DIN 5480 or ISO 4156. HXC uses all three methods, with 100% go\/no-go gauging and lot-sample CMM measurement.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the difference between spline shaft and keyway shaft?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">A <strong>keyway shaft<\/strong> transmits torque through a single rectangular key fitting in a slot (keyway) machined in both shaft and hub. Simple, low-cost, but: high stress concentration at the keyway ends; poor concentricity (the hub can rock slightly on the key); limited torque capacity (only one contact surface). A <strong>spline shaft<\/strong> transmits torque through multiple teeth distributed around the circumference: much higher torque capacity per unit shaft diameter; excellent concentricity (self-centering involute profile); allows axial sliding without losing torque transmission; better fatigue life because stress is distributed. For applications above ~50 Nm or requiring high concentricity, spline shafts are significantly better than keyed shafts.<\/div>\n        <\/div>\n      <\/div>\n      <div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Where is HXC's spline shaft factory located?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">HXC's CNC spline shaft factory is located in <strong>Dongguan, Guangdong, China<\/strong> \u2014 a major precision manufacturing hub in the Pearl River Delta. We have been a Chinese spline shaft manufacturer since 2008, exporting to clients in Germany, USA, Japan, France, Italy, Korea, and 30+ other countries. All spline shaft machining, induction hardening, grinding, and CMM inspection are performed in-house at our China factory \u2014 no outsourcing. Factory visits and video audits are welcome for procurement teams qualifying new china cnc spline shaft suppliers.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Can spline shafts be made hollow?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Yes \u2014 <strong>hollow spline shafts<\/strong> are a HXC specialty. We machine hollow splined shafts from gun-drilled bar stock or seamless tube, with internal bores for weight reduction, oil \/ coolant passage, or cable routing. Common applications include robot joint shafts (saves ~40% mass vs solid), aerospace actuators, modern automotive driveshafts, and racing transmissions. Bore concentricity is held to \u2264 0.01 mm relative to the spline pitch circle. Send your hollow spline shaft drawing \u2014 we will review wall thickness, heat treatment distortion risk, and offer a customized quotation as part of our free DFM analysis.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What material is best for spline shafts?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Spline shaft material properties drive the application: <strong>42CrMo4<\/strong> (induction-hardened, HRC 52\u201358) is the standard for automotive transmission spline shafts and hydraulic pump spline shaft material steel \u2014 good fatigue resistance, predictable heat treatment, excellent machinability. <strong>20CrMnTi<\/strong> (carburized, HRC 58\u201362) for maximum contact fatigue strength in high-torque drive shaft splines. <strong>SUS316L stainless<\/strong> for food, pharma, and marine. <strong>Al 7075-T6<\/strong> (hard-anodized) for lightweight robot joint splines. <strong>Grade 5 titanium<\/strong> for aerospace. <strong>17-4PH stainless<\/strong> for marine and defence. <strong>PEEK<\/strong> for medical sterilizable splines.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the pressure angle used for involute splines?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">The most common pressure angles for involute spline shafts are: <strong>30\u00b0<\/strong> (DIN 5480, ISO 4156) \u2014 the European metric standard; high pressure angle provides a wide tooth root, good load capacity, and self-centering. <strong>37.5\u00b0<\/strong> and <strong>45\u00b0<\/strong> \u2014 used in some ANSI B92.1 series for maximum root strength and minimal radial load on bearings. <strong>20\u00b0<\/strong> \u2014 used in some fine-pitch splines where a larger number of thin teeth is preferred. The pressure angle affects tooth strength, self-centering stiffness, and the specific spline gauge required for inspection. Always specify the pressure angle explicitly \u2014 do not rely on the standard alone, as multiple PA options exist within each standard.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Can spline shafts transmit axial loads?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Standard parallel-axis spline shafts are designed primarily for <strong>torque transmission<\/strong> \u2014 they can transmit axial loads only if the spline is designed with an axial shoulder or retaining ring, as the tooth flanks themselves are not loaded axially in a standard involute spline coupling. For splines that must also transmit significant axial loads, a <strong>helical spline<\/strong> (similar to a helical gear profile) converts torque into an axial preload force \u2014 used in some aircraft engine accessory drives. For light axial loads (preload only), a sliding fit spline with a retaining snap ring on the shaft end is the simplest solution. HXC designs spline shafts for combined torque and axial load if required \u2014 include your load requirements in the drawing notes.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the torque capacity of a spline shaft?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Spline shaft torque capacity depends on <strong>spline OD, module, tooth count, face width, and material hardness<\/strong>. As a rough guide: a DIN 5480 involute spline shaft with m1.5 \/ 30T \/ \u00d845mm in 42CrMo4 (induction hardened) can transmit approximately <strong>500\u2013800 Nm<\/strong> continuously. Capacity scales roughly with the cube of the spline OD for the same module. Key design limits: <strong>tooth shear stress<\/strong> (root shear), <strong>contact stress<\/strong> (flank Hertzian pressure), and <strong>fretting fatigue<\/strong> at the tooth root. HXC engineers can calculate spline torque capacity and recommend module\/tooth count for your application as part of the free DFM review.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Do spline shafts need lubrication?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Lubrication depends on the coupling type: <strong>Fixed spline couplings<\/strong> (no axial sliding in service): a one-time application of molybdenum disulfide (MoS\u2082) grease or anti-seize compound at assembly is sufficient. <strong>Sliding spline couplings<\/strong> (spline slides axially during operation, e.g., driveshaft slip yokes): require a spline-specific grease (NLGI 2 lithium complex with MoS\u2082 or graphite) replenished per maintenance schedule. <strong>Oil-bath environments<\/strong> (gearbox internals): lubricated by the transmission oil \u2014 ensure the oil type is compatible with spline material (EP additives needed for steel splines). Stainless and titanium splines are more tolerant of dry running but still benefit from lubrication.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What accuracy grade should I specify for spline shafts?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">DIN 5480 accuracy grades: <strong>Grade 8\u20139<\/strong> \u2014 hobbed only, no grinding; adequate for slow-speed, low-load industrial spline couplings and large agricultural equipment. <strong>Grade 7<\/strong> \u2014 hobbed and lightly deburred; general industrial and automotive non-critical applications. <strong>Grade 6<\/strong> \u2014 hobbed + ground; standard for automotive transmissions, hydraulic pump splines, and robot joint drives. <strong>Grade 5<\/strong> \u2014 precision ground; for servo robot joints, aerospace actuators, and precision instrument drives where backlash must be tightly controlled. Each step down in grade roughly doubles the inspection and manufacturing cost. Our engineers will recommend the correct grade based on your torque, speed, and positional accuracy requirements.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the lead time for custom spline shafts?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Lead times for spline shafts: <strong>Prototype (1\u20135 pcs), 5-axis milled<\/strong>: 5\u20138 days. <strong>Small batch (10\u201350 pcs), hobbed + ground, DIN 5480 grade 6<\/strong>: 8\u201314 days. <strong>Production batch (100\u20132,000 pcs), hobbed + hardened + ground<\/strong>: 12\u201318 days. <strong>Stainless or titanium spline shafts<\/strong>: add 3\u20135 days for passivation or additional machining difficulty. <strong>Long shafts (&gt;500mm)<\/strong>: add 2\u20133 days for straightness correction after heat treatment. Rush production is available \u2014 discuss your timeline when uploading your drawing.<\/div>\n        <\/div>\n        <div class=\"hxc-faq-item\">\n          <button class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Can HXC make spline shafts with integrated gear teeth or flanges?<span class=\"hxc-faq-icon\">+<\/span><\/button>\n          <div class=\"hxc-faq-body\">Yes \u2014 we regularly manufacture <strong>gear spline shafts<\/strong> that combine external splines, external gear teeth, bearing journals, threaded ends, and mounting flanges in a single shaft. All features are produced in a sequenced operation set ensuring concentricity between the spline, gear, and bearing seats. Examples include: automotive transmission shafts with involute splines at one end and helical gear teeth in the middle; robot joint shafts with splines and integrated bevel gear; hydraulic motor shafts with splines and flange mounting. These are the most complex precision shafts we make \u2014 and the most common custom request. Send us your drawing for a free DFM review and quotation.<\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\n  \"mainEntity\":[\n    {\"@type\":\"Question\",\"name\":\"What is a spline shaft?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A spline shaft has longitudinal teeth along its outer surface that mesh with matching internal splines to transmit torque while permitting axial sliding or precise angular positioning. Unlike a keyed shaft, a spline distributes torque across multiple teeth, giving higher torque capacity, better concentricity, and lower stress concentration.\"}},\n    {\"@type\":\"Question\",\"name\":\"What is the difference between an involute spline and a parallel-key spline?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Involute splines (DIN 5480, ISO 4156, ANSI B92.1) have involute-curve tooth profiles providing self-centering, high torque capacity, and gear-standard manufacturing. Parallel-key splines (DIN 5462\/5463) have straight flat-sided teeth \u2014 simpler to machine but lower load capacity and no self-centering. Involute splines are preferred for automotive and aerospace applications.\"}},\n    {\"@type\":\"Question\",\"name\":\"What standards are used for spline shafts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Main standards: DIN 5480 (European metric, 30\u00b0 pressure angle), ISO 4156 (international, aligned with DIN 5480), ANSI B92.1 (American imperial) and ANSI B92.2M (American metric), SAE J498 (hydraulic pump couplings). HXC produces spline shafts to all three standard systems.\"}},\n    {\"@type\":\"Question\",\"name\":\"How are spline shafts manufactured?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Standard production sequence: (1) Blank turning; (2) Spline hobbing; (3) Heat treatment (induction hardening or carburizing); (4) Spline tooth grinding post-hardening; (5) OD cylindrical grinding of bearing journals; (6) 100% go\/no-go gauge + over-pin measurement.\"}},\n    {\"@type\":\"Question\",\"name\":\"What is fretting in spline shafts and how is it prevented?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fretting is micro-slip wear at spline tooth contact surfaces from cyclic torsional loads with vibration. Prevention: tight fit class, surface hardening, MoS2 grease lubrication, increased tooth count to distribute load, and shot peening for compressive residual stress in the root.\"}},\n    {\"@type\":\"Question\",\"name\":\"What is the difference between spline shaft and keyway shaft?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A keyway shaft uses a single rectangular key in a slot \u2014 simple but high stress concentration, poor concentricity, limited torque capacity. A spline shaft transmits torque through multiple teeth: much higher torque capacity, excellent concentricity, allows axial sliding, better fatigue life. For applications above ~50 Nm or requiring high concentricity, spline shafts are significantly better.\"}},\n    {\"@type\":\"Question\",\"name\":\"What accuracy grade should I specify for spline shafts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DIN 5480 grades: Grade 8\u20139 for slow-speed industrial couplings. Grade 7 for general industrial. Grade 6 (ground) standard for automotive transmissions and robot drives. Grade 5 (precision ground) for servo robots and aerospace. Each step down roughly doubles inspection and manufacturing cost.\"}},\n    {\"@type\":\"Question\",\"name\":\"What is the lead time for custom spline shafts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Prototype (1\u20135 pcs, 5-axis milled): 5\u20138 days. Small batch (10\u201350 pcs, hobbed + ground, DIN 5480 grade 6): 8\u201314 days. Production batch (100\u20132,000 pcs, hobbed + hardened + ground): 12\u201318 days. Stainless or titanium: add 3\u20135 days.\"}}\n  ]\n}\n<\/script>\n\n<script>\nfunction hxcCap(el,id){\n  document.querySelectorAll('.hxc-ct').forEach(t=>t.classList.remove('on'));\n  document.querySelectorAll('.hxc-cb').forEach(p=>p.classList.remove('on'));\n  el.classList.add('on');\n  document.getElementById(id).classList.add('on');\n}\nfunction hxcMat(el,type){\n  document.querySelectorAll('.hxc-mtt').forEach(t=>t.classList.remove('on'));\n  el.classList.add('on');\n  document.getElementById('hxc-met').style.display=type==='hxc-met'?'grid':'none';\n  document.getElementById('hxc-pla').style.display=type==='hxc-pla'?'grid':'none';\n}\nfunction hxcFaq(btn){\n  const body=btn.nextElementSibling,isOpen=btn.classList.contains('open');\n  btn.classList.toggle('open',!isOpen);\n  btn.setAttribute('aria-expanded',String(!isOpen));\n  body.classList.toggle('open',!isOpen);\n}\nconst hxcObs=new IntersectionObserver(entries=>{\n  entries.forEach((e,i)=>{\n    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MOQ 1 piece.<\/p>\n\n  <!-- Stats row -->\n  <div class=\"stats\">\n    <div class=\"stat\">\n      <div class=\"sv\">24<small>hr<\/small><\/div>\n      <div class=\"sl\">Quote Response<\/div>\n    <\/div>\n    <div class=\"stat\">\n      <div class=\"sv\">MOQ <small>1<\/small><\/div>\n      <div class=\"sl\">Prototypes OK<\/div>\n    <\/div>\n    <div class=\"stat\">\n      <div class=\"sv\">ISO<\/div>\n      <div class=\"sl\">9001:2015<\/div>\n    <\/div>\n  <\/div>\n\n  <!-- Advantage list -->\n  <div class=\"avlist\">\n    <div class=\"avitem\">\n      <div class=\"ico\">&#128208;<\/div>\n      <div>\n        <div class=\"at\">DFM Review on Every Enquiry<\/div>\n        <div class=\"ad\">Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback \u2014 not generic pushback.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#127919;<\/div>\n      <div>\n        <div class=\"at\">First Article Inspection \u2014 Standard<\/div>\n        <div class=\"ad\">FAI report on every new run. Material certs and surface treatment certs included with every shipment.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#128260;<\/div>\n      <div>\n        <div class=\"at\">Same Process: Prototype to Production<\/div>\n        <div class=\"ad\">Process plan from your prototype applies to production batches. No re-qualification when you scale.<\/div>\n      <\/div>\n    <\/div>\n    <div class=\"avitem\">\n      <div class=\"ico\">&#9881;<\/div>\n      <div>\n        <div class=\"at\">3 \/ 4 \/ 5-Axis CNC + Turning<\/div>\n        <div class=\"ad\">Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.<\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <!-- Cert tags -->\n  <div class=\"certs\">\n    <span class=\"cert hi\">ISO 9001:2015<\/span>\n    <span class=\"cert\">3\/4\/5-Axis Milling<\/span>\n    <span class=\"cert\">CNC Turning<\/span>\n    <span class=\"cert\">CMM Inspection<\/span>\n    <span class=\"cert\">Global Delivery<\/span>\n  <\/div>\n\n<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-30052ae4 e-con-full e-flex e-con e-child\" data-id=\"30052ae4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e6510ca elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"4e6510ca\" data-element_type=\"widget\" data-e-type=\"widget\" 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shafts, and motor \/ hydraulic pump spline shafts. Diameter 6\u2013400 mm, ground to DIN 5480 \/ ISO 4156 \/ ANSI B92.1 \/ SAE. Made in our [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":39,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-964","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Precision Spline Shafts | CNC Machined Splined Shafts | HXCNC<\/title>\n<meta name=\"description\" content=\"Custom CNC machined spline shafts with involute and straight-sided profiles. Tight tolerances for precise torque transmission in automotive, robotics and industrial drivelines.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hxcnc.com\/ro\/product\/spline-shafts\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spline Shafts\" \/>\n<meta property=\"og:description\" content=\"Custom CNC machined spline shafts with involute and straight-sided profiles. 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