{"id":1144,"date":"2026-04-10T07:39:31","date_gmt":"2026-04-10T07:39:31","guid":{"rendered":"https:\/\/hxcnc.com\/?page_id=1144"},"modified":"2026-05-26T08:12:30","modified_gmt":"2026-05-26T08:12:30","slug":"preload-ring","status":"publish","type":"page","link":"https:\/\/hxcnc.com\/fr\/product\/preload-ring\/","title":{"rendered":"Anneaux de pr\u00e9charge personnalis\u00e9s"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1144\" class=\"elementor elementor-1144\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-aabbccdd elementor-section-stretched elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"aabbccdd\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container 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20px}}\n@media(max-width:480px){.hxc-hbtns,.hxc-ctabs,.hxc-hero2-btns{flex-direction:column;align-items:stretch}.hxc-btn{justify-content:center;width:100%}.hxc-hero2-stats{grid-template-columns:1fr 1fr}.hxc-hero2-chips{grid-template-columns:1fr}}\n<\/style>\n\n<div class=\"hxc-wrap\">\n  <section class=\"hxc-hero2\">\n    <div class=\"hxc-hero2-stripe\"><\/div>\n    <div class=\"hxc-inner\">\n      <div class=\"hxc-hero2-grid\">\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\">\u00b10.005 Length \u00b7 \u00b10.001 Matched \u00b7 0.001 Face Flat<\/div>\n            <div class=\"hxc-hero2-id\">PR \/ 001 \u2014 008<\/div>\n          <\/div>\n          <h1 class=\"hxc-hero2-h1\">Bearing-Pair Preload<br><em>Preload Rings<\/em><\/h1>\n          <p class=\"hxc-hero2-sub\">Precision CNC ground bearing preload rings and axial preload collars \u2014 axial length \u00b10.005 mm (matched sets to \u00b10.001 mm), face parallelism \u2264 0.003 mm, face flatness \u2264 0.001 mm. For angular contact and taper roller bearing pair preload in machine tool spindles, gearboxes, and precision actuators.<\/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\">Axial Length Std<\/div><\/div>\n            <div class=\"hxc-hero2-stat\"><div class=\"hxc-hero2-stat-v\">\u00b10.001<sup>mm<\/sup><\/div><div class=\"hxc-hero2-stat-l\">Matched Set<\/div><\/div>\n            <div class=\"hxc-hero2-stat\"><div class=\"hxc-hero2-stat-v\">\u22640.001<sup>mm<\/sup><\/div><div class=\"hxc-hero2-stat-l\">Face Flatness<\/div><\/div>\n          <\/div>\n          <div class=\"hxc-hero2-btns\">\n            <a href=\"#hxc-cta\" class=\"hxc-btn hxc-p\">Get Instant Quote <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        <div class=\"hxc-hero2-R\">\n          <div class=\"hxc-hero2-board\">\n            <div class=\"hxc-hero2-ribbon\">\n              <span><span class=\"dot\"><\/span>PART DWG \u00b7 PR-000 PRELOAD RING \u00b7 100Cr6 (SUJ2) \u00b7 60-62 HRC<\/span>\n              <span>ISO 9001 \u00b7 \u00b10.005 GROUND \u00b7 MATCHED SET<\/span>\n            <\/div>\n            <div class=\"hxc-hero2-pin hxc-hero2-pin-a hxc-hero2-pin-1\">\u00b10.005 Length<\/div>\n            <div class=\"hxc-hero2-pin hxc-hero2-pin-2\">Matched Set<\/div>\n            <div class=\"hxc-hero2-scene\">\n              <svg viewBox=\"0 0 480 360\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-label=\"Preload ring cross-section drawing \u2014 assembly view showing two angular-contact bearings with the preload ring (slate-coloured solid blocks) between the inner races. Bearing housings top and bottom, balls between outer and inner races, the preload ring shown as the product in context. Force arrows on the outer races indicate axial preload compression. Critical length dimension L=25.000\u00b10.005 shown below the ring. Four corners: length precision class table, preload effect table, four ring configuration end-views, material vs HRC table.\">\n                <defs>\n                  <linearGradient id=\"prSlate\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\"><stop offset=\"0\" stop-color=\"#94A3B8\"\/><stop offset=\"1\" stop-color=\"#475569\"\/><\/linearGradient>\n                  <linearGradient id=\"prSteel\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\"><stop offset=\"0\" stop-color=\"#64748B\"\/><stop offset=\"1\" stop-color=\"#334155\"\/><\/linearGradient>\n                  <radialGradient id=\"prGlow\" cx=\"50%\" cy=\"50%\" r=\"50%\"><stop offset=\"0\" stop-color=\"rgba(148,163,184,.55)\"\/><stop offset=\"1\" stop-color=\"transparent\"\/><\/radialGradient>\n                <\/defs>\n                <g transform=\"translate(160,196)\">\n                  <ellipse cx=\"0\" cy=\"0\" rx=\"148\" ry=\"40\" fill=\"url(#prGlow)\" opacity=\".55\"\/>\n                  <text x=\"-145\" y=\"-86\" font-family=\"Roboto Condensed,sans-serif\" font-size=\"9\" font-weight=\"700\" fill=\"#94A3B8\">PRELOAD RING \u00b7 BEARING PAIR ASSEMBLY \u00b7 DB BACK-TO-BACK<\/text>\n                  <text x=\"-145\" y=\"-76\" font-family=\"Roboto Mono,monospace\" font-size=\"5\" fill=\"rgba(148,163,184,.7)\">100Cr6 (SUJ2) HRC 60-62 \u00b7 LENGTH \u00b10.005 \u00b7 FACE FLAT 0.001<\/text>\n\n                  <!-- Length GD&T pointing to the ring -->\n                  <g transform=\"translate(-32,-66)\">\n                    <rect x=\"0\" y=\"0\" width=\"64\" height=\"10\" fill=\"none\" stroke=\"#FCD34D\" stroke-width=\".5\"\/>\n                    <line x1=\"14\" y1=\"0\" x2=\"14\" y2=\"10\" stroke=\"#FCD34D\" stroke-width=\".5\"\/>\n                    <path d=\"M 4,4 L 10,4 L 7,7 L 7,4 M 7,7 L 4,7 L 7,4\" fill=\"none\" stroke=\"#FCD34D\" stroke-width=\".5\"\/>\n                    <text x=\"38\" y=\"7\" font-family=\"Roboto Mono,monospace\" font-size=\"6.5\" fill=\"#FCD34D\" text-anchor=\"middle\" font-weight=\"700\">25.000 \u00b10.005<\/text>\n                  <\/g>\n                  <line x1=\"0\" y1=\"-56\" x2=\"0\" y2=\"-22\" stroke=\"#FCD34D\" stroke-width=\".4\" stroke-dasharray=\"2 2\"\/>\n                  <text x=\"40\" y=\"-50\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"rgba(252,211,77,.7)\">axial length<\/text>\n\n                  <!-- LEFT BEARING ASSEMBLY (x = -90 to -30) -->\n                  <!-- outer race housing top -->\n                  <rect x=\"-90\" y=\"-32\" width=\"60\" height=\"6\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".5\"\/>\n                  <!-- outer race housing bottom -->\n                  <rect x=\"-90\" y=\"26\" width=\"60\" height=\"6\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".5\"\/>\n                  <!-- outer race body top -->\n                  <rect x=\"-86\" y=\"-26\" width=\"52\" height=\"8\" fill=\"rgba(100,116,139,.65)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <!-- outer race body bottom -->\n                  <rect x=\"-86\" y=\"18\" width=\"52\" height=\"8\" fill=\"rgba(100,116,139,.65)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <!-- balls (angular contact orientation: top ball touches outer-top + inner-bottom of top side) -->\n                  <g fill=\"rgba(148,163,184,.8)\" stroke=\"#1E293B\" stroke-width=\".4\">\n                    <circle cx=\"-60\" cy=\"-13\" r=\"5.5\"\/>\n                    <circle cx=\"-60\" cy=\"13\" r=\"5.5\"\/>\n                  <\/g>\n                  <!-- inner race top -->\n                  <rect x=\"-86\" y=\"-8\" width=\"52\" height=\"4\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <!-- inner race bottom -->\n                  <rect x=\"-86\" y=\"4\" width=\"52\" height=\"4\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n\n                  <!-- THE PRELOAD RING (x = -30 to 30) -- THE PRODUCT, slate colored -->\n                  <rect x=\"-30\" y=\"-8\" width=\"60\" height=\"4\" fill=\"url(#prSlate)\" stroke=\"#94A3B8\" stroke-width=\".8\"\/>\n                  <rect x=\"-30\" y=\"4\" width=\"60\" height=\"4\" fill=\"url(#prSlate)\" stroke=\"#94A3B8\" stroke-width=\".8\"\/>\n                  <!-- Ring highlight glow -->\n                  <rect x=\"-30\" y=\"-8\" width=\"60\" height=\"4\" fill=\"none\" stroke=\"#94A3B8\" stroke-width=\"1.6\" opacity=\".6\"\/>\n                  <rect x=\"-30\" y=\"4\" width=\"60\" height=\"4\" fill=\"none\" stroke=\"#94A3B8\" stroke-width=\"1.6\" opacity=\".6\"\/>\n\n                  <!-- RIGHT BEARING ASSEMBLY (x = 30 to 90) -->\n                  <rect x=\"30\" y=\"-32\" width=\"60\" height=\"6\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".5\"\/>\n                  <rect x=\"30\" y=\"26\" width=\"60\" height=\"6\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".5\"\/>\n                  <rect x=\"34\" y=\"-26\" width=\"52\" height=\"8\" fill=\"rgba(100,116,139,.65)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <rect x=\"34\" y=\"18\" width=\"52\" height=\"8\" fill=\"rgba(100,116,139,.65)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <g fill=\"rgba(148,163,184,.8)\" stroke=\"#1E293B\" stroke-width=\".4\">\n                    <circle cx=\"60\" cy=\"-13\" r=\"5.5\"\/>\n                    <circle cx=\"60\" cy=\"13\" r=\"5.5\"\/>\n                  <\/g>\n                  <rect x=\"34\" y=\"-8\" width=\"52\" height=\"4\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n                  <rect x=\"34\" y=\"4\" width=\"52\" height=\"4\" fill=\"url(#prSteel)\" stroke=\"#1E293B\" stroke-width=\".4\"\/>\n\n                  <!-- Shaft through center (passes through inner races and ring) -->\n                  <line x1=\"-100\" y1=\"-4\" x2=\"100\" y2=\"-4\" stroke=\"rgba(100,116,139,.55)\" stroke-width=\".4\" stroke-dasharray=\"3 1.5\"\/>\n                  <line x1=\"-100\" y1=\"4\" x2=\"100\" y2=\"4\" stroke=\"rgba(100,116,139,.55)\" stroke-width=\".4\" stroke-dasharray=\"3 1.5\"\/>\n                  <text x=\"0\" y=\"2\" font-family=\"Roboto Mono,monospace\" font-size=\"3\" fill=\"rgba(148,163,184,.55)\" text-anchor=\"middle\">SHAFT \u00d8<\/text>\n\n                  <!-- Centre axis -->\n                  <line x1=\"-110\" y1=\"0\" x2=\"110\" y2=\"0\" stroke=\"rgba(148,163,184,.5)\" stroke-width=\".3\" stroke-dasharray=\"6 2 1 2\"\/>\n\n                  <!-- PRELOAD force arrows (axial, pushing inward at both ends) -->\n                  <g stroke=\"#94A3B8\" stroke-width=\"1.8\" fill=\"#94A3B8\">\n                    <line x1=\"-115\" y1=\"-29\" x2=\"-92\" y2=\"-29\"\/>\n                    <path d=\"M -92,-29 l -4,-2.5 l 0,5 z\"\/>\n                    <line x1=\"-115\" y1=\"29\" x2=\"-92\" y2=\"29\"\/>\n                    <path d=\"M -92,29 l -4,-2.5 l 0,5 z\"\/>\n                    <line x1=\"115\" y1=\"-29\" x2=\"92\" y2=\"-29\"\/>\n                    <path d=\"M 92,-29 l 4,-2.5 l 0,5 z\"\/>\n                    <line x1=\"115\" y1=\"29\" x2=\"92\" y2=\"29\"\/>\n                    <path d=\"M 92,29 l 4,-2.5 l 0,5 z\"\/>\n                  <\/g>\n                  <text x=\"-128\" y=\"-26\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">Fa<\/text>\n                  <text x=\"128\" y=\"-26\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">Fa<\/text>\n                  <text x=\"-128\" y=\"34\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">Fa<\/text>\n                  <text x=\"128\" y=\"34\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">Fa<\/text>\n\n                  <!-- Bearing labels -->\n                  <text x=\"-60\" y=\"-40\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"rgba(148,163,184,.85)\" text-anchor=\"middle\" font-weight=\"700\">BRG #1<\/text>\n                  <text x=\"-60\" y=\"-35\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.6)\" text-anchor=\"middle\">angular contact<\/text>\n                  <text x=\"60\" y=\"-40\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"rgba(148,163,184,.85)\" text-anchor=\"middle\" font-weight=\"700\">BRG #2<\/text>\n                  <text x=\"60\" y=\"-35\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.6)\" text-anchor=\"middle\">angular contact<\/text>\n\n                  <!-- The RING label\/leader -->\n                  <text x=\"0\" y=\"-12\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">PRELOAD RING<\/text>\n                  <text x=\"0\" y=\"-8\" font-family=\"Roboto Mono,monospace\" font-size=\"3\" fill=\"rgba(148,163,184,.7)\" text-anchor=\"middle\">(THE PRODUCT)<\/text>\n\n                  <!-- Length dim below the ring -->\n                  <line x1=\"-30\" y1=\"46\" x2=\"30\" y2=\"46\" stroke=\"#94A3B8\" stroke-width=\".5\"\/>\n                  <line x1=\"-30\" y1=\"48\" x2=\"-30\" y2=\"34\" stroke=\"#94A3B8\" stroke-width=\".4\" stroke-dasharray=\"2 1\"\/>\n                  <line x1=\"30\" y1=\"48\" x2=\"30\" y2=\"34\" stroke=\"#94A3B8\" stroke-width=\".4\" stroke-dasharray=\"2 1\"\/>\n                  <path d=\"M -30,46 l 4,-2 l 0,4 z\" fill=\"#94A3B8\"\/><path d=\"M 30,46 l -4,-2 l 0,4 z\" fill=\"#94A3B8\"\/>\n                  <text x=\"0\" y=\"56\" font-family=\"Roboto Mono,monospace\" font-size=\"6.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">L = 25.000 \u00b10.005 \u00b7 GROUND<\/text>\n                <\/g>\n\n                <!-- TOP-LEFT: length precision class -->\n                <g transform=\"translate(20,30)\">\n                  <rect x=\"0\" y=\"0\" width=\"172\" height=\"84\" 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\">LENGTH \u00b7 PRECISION<\/text>\n                  <line x1=\"10\" y1=\"22\" x2=\"162\" y2=\"22\" stroke=\"rgba(255,255,255,.2)\" stroke-width=\".5\"\/>\n                  <text x=\"14\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\">CLASS<\/text>\n                  <text x=\"92\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\">TOL<\/text>\n                  <text x=\"158\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\" text-anchor=\"end\">USE<\/text>\n                  <g font-family=\"Roboto Mono,monospace\" font-size=\"6\">\n                    <text x=\"14\" y=\"40\" fill=\"#fff\">Standard<\/text><text x=\"92\" y=\"40\" fill=\"rgba(255,255,255,.75)\">\u00b10.010<\/text><text x=\"158\" y=\"40\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">gearbox<\/text>\n                    <rect x=\"10\" y=\"44\" width=\"152\" height=\"11\" fill=\"rgba(148,163,184,.22)\" rx=\"2\"\/>\n                    <text x=\"14\" y=\"52\" fill=\"#fff\" font-weight=\"700\">Fine \u25c0<\/text><text x=\"92\" y=\"52\" fill=\"#fff\" font-weight=\"700\">\u00b10.005<\/text><text x=\"158\" y=\"52\" fill=\"#fff\" font-weight=\"700\" text-anchor=\"end\">servo \/ actuator<\/text>\n                    <text x=\"14\" y=\"64\" fill=\"#fff\">Precision<\/text><text x=\"92\" y=\"64\" fill=\"rgba(255,255,255,.75)\">\u00b10.002<\/text><text x=\"158\" y=\"64\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">spindle<\/text>\n                    <text x=\"14\" y=\"76\" fill=\"#FCD34D\">Matched set<\/text><text x=\"92\" y=\"76\" fill=\"rgba(252,211,77,.85)\">\u00b10.001<\/text><text x=\"158\" y=\"76\" fill=\"rgba(252,211,77,.7)\" text-anchor=\"end\">grinding spindle<\/text>\n                  <\/g>\n                <\/g>\n\n                <!-- TOP-RIGHT: preload effect -->\n                <g transform=\"translate(290,30)\">\n                  <rect x=\"0\" y=\"0\" width=\"180\" height=\"84\" 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\">PRELOAD \u00b7 EFFECT<\/text>\n                  <line x1=\"10\" y1=\"22\" x2=\"170\" y2=\"22\" stroke=\"rgba(255,255,255,.2)\" stroke-width=\".5\"\/>\n                  <text x=\"14\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\">FORCE<\/text>\n                  <text x=\"86\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\">STIFFNESS<\/text>\n                  <text x=\"166\" y=\"30\" font-family=\"Roboto Mono,monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,.55)\" text-anchor=\"end\">LIFE<\/text>\n                  <g font-family=\"Roboto Mono,monospace\" font-size=\"6\">\n                    <text x=\"14\" y=\"40\" fill=\"#fff\">Low<\/text><text x=\"86\" y=\"40\" fill=\"rgba(255,255,255,.75)\">low<\/text><text x=\"166\" y=\"40\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">normal<\/text>\n                    <rect x=\"10\" y=\"44\" width=\"160\" height=\"11\" fill=\"rgba(148,163,184,.22)\" rx=\"2\"\/>\n                    <text x=\"14\" y=\"52\" fill=\"#fff\" font-weight=\"700\">Medium \u25c0<\/text><text x=\"86\" y=\"52\" fill=\"#fff\" font-weight=\"700\">high<\/text><text x=\"166\" y=\"52\" fill=\"#fff\" font-weight=\"700\" text-anchor=\"end\">normal<\/text>\n                    <text x=\"14\" y=\"64\" fill=\"#fff\">High<\/text><text x=\"86\" y=\"64\" fill=\"rgba(255,255,255,.75)\">very high<\/text><text x=\"166\" y=\"64\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">reduced<\/text>\n                    <text x=\"14\" y=\"76\" fill=\"#F87171\">Too high<\/text><text x=\"86\" y=\"76\" fill=\"rgba(248,113,113,.85)\">\u2014<\/text><text x=\"166\" y=\"76\" fill=\"rgba(248,113,113,.85)\" text-anchor=\"end\">seizure<\/text>\n                  <\/g>\n                <\/g>\n\n                <!-- BOTTOM-LEFT: 4 ring configurations end-view -->\n                <g transform=\"translate(20,232)\">\n                  <rect x=\"0\" y=\"0\" width=\"172\" height=\"108\" 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\">RING \u00b7 CONFIG<\/text>\n                  <!-- PLAIN spacer (full ring) -->\n                  <g transform=\"translate(28,48)\">\n                    <circle cx=\"0\" cy=\"0\" r=\"11\" fill=\"rgba(148,163,184,.22)\" stroke=\"#94A3B8\" stroke-width=\".6\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"5\" fill=\"rgba(15,23,42,.6)\" stroke=\"#94A3B8\" stroke-width=\".4\"\/>\n                    <text x=\"0\" y=\"22\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">PLAIN \u25c0<\/text>\n                    <text x=\"0\" y=\"28\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.65)\" text-anchor=\"middle\">full ring<\/text>\n                  <\/g>\n                  <!-- INNER ONLY (only rides on inner race) -->\n                  <g transform=\"translate(64,48)\">\n                    <circle cx=\"0\" cy=\"0\" r=\"11\" fill=\"rgba(15,23,42,.3)\" stroke=\"rgba(148,163,184,.3)\" stroke-width=\".4\" stroke-dasharray=\"2 1\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"7\" fill=\"rgba(148,163,184,.45)\" stroke=\"#94A3B8\" stroke-width=\".6\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"5\" fill=\"rgba(15,23,42,.6)\" stroke=\"#94A3B8\" stroke-width=\".4\"\/>\n                    <text x=\"0\" y=\"22\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">INNER<\/text>\n                    <text x=\"0\" y=\"28\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.65)\" text-anchor=\"middle\">inner race<\/text>\n                  <\/g>\n                  <!-- OUTER ONLY (only rides on outer race) -->\n                  <g transform=\"translate(102,48)\">\n                    <circle cx=\"0\" cy=\"0\" r=\"11\" fill=\"rgba(148,163,184,.45)\" stroke=\"#94A3B8\" stroke-width=\".6\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"8\" fill=\"rgba(15,23,42,.6)\" stroke=\"rgba(148,163,184,.3)\" stroke-width=\".4\" stroke-dasharray=\"2 1\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"5\" fill=\"rgba(15,23,42,.6)\" stroke=\"rgba(148,163,184,.4)\" stroke-width=\".3\" stroke-dasharray=\"1 1\"\/>\n                    <text x=\"0\" y=\"22\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">OUTER<\/text>\n                    <text x=\"0\" y=\"28\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.65)\" text-anchor=\"middle\">outer race<\/text>\n                  <\/g>\n                  <!-- DUPLEX (inner + outer rings, paired) -->\n                  <g transform=\"translate(140,48)\">\n                    <circle cx=\"0\" cy=\"0\" r=\"11\" fill=\"rgba(148,163,184,.45)\" stroke=\"#94A3B8\" stroke-width=\".6\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"8.5\" fill=\"rgba(15,23,42,.6)\" stroke=\"#94A3B8\" stroke-width=\".4\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"7\" fill=\"rgba(148,163,184,.45)\" stroke=\"#94A3B8\" stroke-width=\".4\"\/>\n                    <circle cx=\"0\" cy=\"0\" r=\"5\" fill=\"rgba(15,23,42,.6)\" stroke=\"#94A3B8\" stroke-width=\".4\"\/>\n                    <text x=\"0\" y=\"22\" font-family=\"Roboto Mono,monospace\" font-size=\"4.5\" fill=\"#94A3B8\" text-anchor=\"middle\" font-weight=\"700\">DUPLEX<\/text>\n                    <text x=\"0\" y=\"28\" font-family=\"Roboto Mono,monospace\" font-size=\"3.5\" fill=\"rgba(148,163,184,.65)\" text-anchor=\"middle\">in + out<\/text>\n                  <\/g>\n                  <line x1=\"14\" y1=\"88\" x2=\"158\" y2=\"88\" stroke=\"rgba(255,255,255,.15)\" stroke-width=\".4\"\/>\n                  <text x=\"86\" y=\"98\" font-family=\"Roboto Mono,monospace\" font-size=\"5\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"middle\">+ STEPPED \u00b7 WAVE-SPRING \u00b7 CUSTOM<\/text>\n                  <text x=\"86\" y=\"104\" font-family=\"Roboto Mono,monospace\" font-size=\"4\" fill=\"rgba(148,163,184,.85)\" text-anchor=\"middle\" font-weight=\"700\">SPECIFY ID \/ OD \/ LENGTH<\/text>\n                <\/g>\n\n                <!-- BOTTOM-RIGHT: material table -->\n                <g transform=\"translate(220,232)\">\n                  <rect x=\"0\" y=\"0\" width=\"252\" height=\"108\" 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\">MATERIAL \u00b7 HRC \u00b7 USE<\/text>\n                  <line x1=\"10\" y1=\"22\" x2=\"242\" y2=\"22\" stroke=\"rgba(255,255,255,.2)\" stroke-width=\".5\"\/>\n                  <text x=\"14\" y=\"32\" font-family=\"Roboto Mono,monospace\" font-size=\"6\" fill=\"rgba(255,255,255,.55)\">MATERIAL<\/text>\n                  <text x=\"138\" y=\"32\" font-family=\"Roboto Mono,monospace\" font-size=\"6\" fill=\"rgba(255,255,255,.55)\">HARDNESS<\/text>\n                  <text x=\"238\" y=\"32\" font-family=\"Roboto Mono,monospace\" font-size=\"6\" fill=\"rgba(255,255,255,.55)\" text-anchor=\"end\">USE<\/text>\n                  <line x1=\"10\" y1=\"38\" x2=\"242\" y2=\"38\" stroke=\"rgba(255,255,255,.1)\" stroke-width=\".4\"\/>\n                  <g font-family=\"Roboto Mono,monospace\" font-size=\"6.5\">\n                    <rect x=\"10\" y=\"40\" width=\"232\" height=\"11\" fill=\"rgba(148,163,184,.22)\" rx=\"2\"\/>\n                    <text x=\"14\" y=\"48\" fill=\"#fff\" font-weight=\"700\">100Cr6 SUJ2 \u25c0<\/text><text x=\"138\" y=\"48\" fill=\"#fff\" font-weight=\"700\">HRC 60-62<\/text><text x=\"238\" y=\"48\" fill=\"#fff\" font-weight=\"700\" text-anchor=\"end\">spindle \/ standard<\/text>\n                    <line x1=\"10\" y1=\"54\" x2=\"242\" y2=\"54\" stroke=\"rgba(255,255,255,.08)\" stroke-width=\".3\"\/>\n                    <text x=\"14\" y=\"64\" fill=\"#fff\">42CrMo4 H<\/text><text x=\"138\" y=\"64\" fill=\"rgba(255,255,255,.75)\">HRC 52-58<\/text><text x=\"238\" y=\"64\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">gearbox<\/text>\n                    <line x1=\"10\" y1=\"68\" x2=\"242\" y2=\"68\" stroke=\"rgba(255,255,255,.08)\" stroke-width=\".3\"\/>\n                    <text x=\"14\" y=\"78\" fill=\"#fff\">SUS440C<\/text><text x=\"138\" y=\"78\" fill=\"rgba(255,255,255,.75)\">HRC 56-58<\/text><text x=\"238\" y=\"78\" fill=\"rgba(255,255,255,.65)\" text-anchor=\"end\">clean room<\/text>\n                    <line x1=\"10\" y1=\"82\" x2=\"242\" y2=\"82\" stroke=\"rgba(255,255,255,.08)\" stroke-width=\".3\"\/>\n                    <text x=\"14\" y=\"92\" fill=\"#FCD34D\">Si3N4 ceramic<\/text><text x=\"138\" y=\"92\" fill=\"rgba(252,211,77,.85)\">HV 1500<\/text><text x=\"238\" y=\"92\" fill=\"rgba(252,211,77,.7)\" text-anchor=\"end\">hi-speed spindle<\/text>\n                    <line x1=\"10\" y1=\"96\" x2=\"242\" y2=\"96\" stroke=\"rgba(255,255,255,.08)\" stroke-width=\".3\"\/>\n                    <text x=\"14\" y=\"105\" fill=\"rgba(125,211,252,.85)\">Bronze ZA<\/text><text x=\"138\" y=\"105\" fill=\"rgba(125,211,252,.7)\">\u2014<\/text><text x=\"238\" y=\"105\" fill=\"rgba(125,211,252,.65)\" text-anchor=\"end\">sliding \/ damping<\/text>\n                  <\/g>\n                <\/g>\n                <text x=\"468\" y=\"20\" font-family=\"Roboto Mono,monospace\" font-size=\"8\" fill=\"rgba(255,255,255,.4)\" text-anchor=\"end\" letter-spacing=\"1\">SCALE 2:1 \u00b7 MM<\/text>\n              <\/svg>\n            <\/div>\n            <div class=\"hxc-hero2-chips\">\n              <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">Spindle \u00b7 Gearbox \u00b7 Servo \u00b7 Actuator \u00b7 Robot \u00b7 Aero<\/div><div class=\"hxc-hero2-chip-l\">Applications<\/div><\/div>\n              <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">100Cr6 SUJ2 \u00b7 42CrMo4 \u00b7 SUS440C \u00b7 Si3N4 \u00b7 Bronze<\/div><div class=\"hxc-hero2-chip-l\">Materials<\/div><\/div>\n              <div class=\"hxc-hero2-chip\"><div class=\"hxc-hero2-chip-v\">48<span>hr<\/span> Quote \u00b7 3-Day Proto<\/div><div class=\"hxc-hero2-chip-l\">Service<\/div><\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\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\">Axial Length<br>standard precision grade<\/div><\/div>\n      <div class=\"hxc-st\"><div class=\"hxc-sn\">\u00b10.001mm<\/div><div class=\"hxc-sl2\">Matched Set<br>sorted into bins<\/div><\/div>\n      <div class=\"hxc-st\"><div class=\"hxc-sn\">\u22640.001mm<\/div><div class=\"hxc-sl2\">Face Flatness<br>parallel ground<\/div><\/div>\n      <div class=\"hxc-st\"><div class=\"hxc-sn\">3 Days<\/div><div class=\"hxc-sl2\">Fastest Delivery<br>prototype rings<\/div><\/div>\n    <\/div>\n  <\/div>\n\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\">Preload Rings We Have Made<\/h2>\n          <p class=\"hxc-sub\">Precision CNC ground preload rings for automotive, robotics, aerospace, medical, and industrial applications.<\/p>\n        <\/div>\n        <a class=\"hxc-btn hxc-o\" href=\"#hxc-cta\" 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\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Spindle Pair\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Industrial-Drive.webp\"><span class=\"hxc-gtag\">100Cr6 \u00b7 Spindle<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Spindle Pair<\/div><div class=\"hxc-gm\">\u00d850\/40 \u00b7 L=15 \u00b10.002 \u00b7 200 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Medical Actuator\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Medical-Device.webp\"><span class=\"hxc-gtag\">SUS440C \u00b7 Medical<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Medical Actuator<\/div><div class=\"hxc-gm\">SUS440C \u00b7 Passivated \u00b7 50 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Robot Joint\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Robot-Joint.webp\"><span class=\"hxc-gtag\">100Cr6 \u00b7 Robot<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Robot Joint<\/div><div class=\"hxc-gm\">\u00d840\/32 \u00b7 Matched \u00b10.001 \u00b7 80 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Aero Actuator\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Aerospace.webp\"><span class=\"hxc-gtag\">42CrMo4 \u00b7 Aero<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Aero Actuator<\/div><div class=\"hxc-gm\">42CrMo4 H \u00b7 \u00b10.002 \u00b7 12 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Gearbox\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-General-Machinery.webp\"><span class=\"hxc-gtag\">42CrMo4 \u00b7 Gearbox<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Gearbox Pair<\/div><div class=\"hxc-gm\">42CrMo4 \u00b7 \u00b10.005 \u00b7 300 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Ceramic Hi-Speed\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Precision-Instrument.webp\"><span class=\"hxc-gtag\">Si3N4 \u00b7 Ceramic<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Ceramic Hi-Speed<\/div><div class=\"hxc-gm\">Si3N4 \u00b7 HV 1500 \u00b7 25 pcs<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Matched Set\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-High-Load.webp\"><span class=\"hxc-gtag\">100Cr6 \u00b7 Matched<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Matched Set \u00b10.001<\/div><div class=\"hxc-gm\">Sorted into bins \u00b7 Spindle reb. \u00b7 8 sets<\/div><\/div><\/div>\n        <div class=\"hxc-gc\">\n          <img decoding=\"async\" alt=\"Preload Ring \u2014 Full CMM Report\" src=\"https:\/\/hxcnc.com\/wp-content\/uploads\/2026\/05\/Preload-Rings-Full-CMM-Report.webp\"><span class=\"hxc-gtag\">CMM Verified<\/span><div class=\"hxc-gov\"><div class=\"hxc-gn\">Preload Ring \u2014 Full CMM Report<\/div><div class=\"hxc-gm\">Every ring measured + binned<\/div><\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"hxc-s\">\n    <div class=\"hxc-inner\" 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 Finished Part<\/h2>\n      <p class=\"hxc-sub\" style=\"margin:0 auto\">Upload your drawing \u2014 material, length tolerance, and surface treatment. Quote in 48 hours.<\/p>\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\">STEP, DXF, PDF, or sketch with key dimensions and tolerances.<\/div><\/div>\n        <div class=\"hxc-ps\"><div class=\"hxc-psn\">02<\/div><div class=\"hxc-pst\">Quote in 48h<\/div><div class=\"hxc-psd\">Material, process, surface treatment, and firm lead time.<\/div><\/div>\n        <div class=\"hxc-ps\"><div class=\"hxc-psn\">03<\/div><div class=\"hxc-pst\">CNC Machine &amp; Inspect<\/div><div class=\"hxc-psd\">Precision turning, grinding, CMM verification, surface treatment.<\/div><\/div>\n        <div class=\"hxc-ps\"><div class=\"hxc-psn\">04<\/div><div class=\"hxc-pst\">Ship Worldwide<\/div><div class=\"hxc-psd\">Full dimensional report. DHL \/ FedEx \/ sea freight.<\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\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 Preload Rings Manufacturer<\/h2>\n      <\/div>\n      <div class=\"hxc-tsg\">\n        <div class=\"hxc-tsi hxc-rv\"><div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div><div class=\"hxc-tst\">\"Excellent dimensional consistency across every batch. CMM report matched our incoming inspection perfectly. Lead time as promised.\"<\/div><div class=\"hxc-tshr\"><\/div><div class=\"hxc-tsau\"><div class=\"hxc-tsav\">AK<\/div><div><div class=\"hxc-tsnm\">Alex K.<\/div><div class=\"hxc-tsco\">Mechanical Engineer \u00b7 Germany<\/div><\/div><\/div><\/div>\n        <div class=\"hxc-tsi hxc-rv\"><div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div><div class=\"hxc-tst\">\"HXC's DFM review caught two design issues before production. Finished parts were perfect first time. Strongly recommended.\"<\/div><div class=\"hxc-tshr\"><\/div><div class=\"hxc-tsau\"><div class=\"hxc-tsav\">SL<\/div><div><div class=\"hxc-tsnm\">Sophie L.<\/div><div class=\"hxc-tsco\">Design Engineer \u00b7 France<\/div><\/div><\/div><\/div>\n        <div class=\"hxc-tsi hxc-rv\"><div class=\"hxc-tss\">\u2605\u2605\u2605\u2605\u2605<\/div><div class=\"hxc-tst\">\"Three years sourcing precision components from HXC. Quality consistent, lead times reliable, engineers always responsive.\"<\/div><div class=\"hxc-tshr\"><\/div><div class=\"hxc-tsau\"><div class=\"hxc-tsav\">JT<\/div><div><div class=\"hxc-tsnm\">James T.<\/div><div class=\"hxc-tsco\">Senior Engineer \u00b7 UK<\/div><\/div><\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\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\">Preload Rings \u2014 Frequently Asked Questions<\/h2>\n      <p class=\"hxc-sub\" style=\"margin-bottom:40px\">Technical and sourcing questions answered by our engineers.<\/p>\n      <div class=\"hxc-faq-grid\">\n        <div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is a preload ring?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">A preload ring (preload collar) is a <strong>precision spacer specifically designed to set the axial preload in a bearing pair<\/strong> \u2014 typically angular contact or taper roller bearings arranged back-to-back (DB) or face-to-face (DF). The ring sits between the inner or outer races of the two bearings and determines the preload force. Preload rings are supplied in matched lengths (\u00b10.005 mm or tighter) and sometimes in graduated size sets to allow field adjustment of preload.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What types of bearing preload exist?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">Two types of preload: <strong>Rigid preload<\/strong> \u2014 a fixed spacer (preload ring) of precise length locks in a fixed preload force. Good for stable temperature conditions. <strong>Resilient (spring) preload<\/strong> \u2014 a disc spring or wave spring applies a force-controlled preload that maintains consistent force despite thermal expansion. For machine tool spindles: rigid preload via precision spacer rings is standard \u2014 the ring length is ground to \u00b10.002 mm. For general gearboxes: \u00b10.005 mm is sufficient.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What happens if bearing preload is too high or too low?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\"><strong>Too high preload<\/strong>: excess friction \u2192 heat generation \u2192 thermal expansion \u2192 further increase in preload (positive feedback) \u2192 bearing seizure. Also: reduced fatigue life, higher motor current. <strong>Too low preload<\/strong>: balls skid (slip instead of roll) at high speed \u2192 smearing of raceway \u2192 premature failure. Preload window is specified by the bearing manufacturer \u2014 the preload ring length must be matched to put the assembly within this window.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Can preload rings be supplied in matched sets?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">Yes \u2014 HXC regularly supplies preload rings as <strong>matched sets sorted by length into \u00b10.001 mm bins<\/strong>. This allows the assembler to select the exact ring length needed to achieve the target preload during assembly. For spindle rebuilds where the bearing pair and housing have worn to specific dimensions, matched preload ring sets allow restoring the original preload without replacing the bearings.<\/div><\/div>\n        <\/div>\n        <div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What is the lead time?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">Prototype (1\u20135 pcs, ground + lapped): 3\u20135 days. Small batch (10\u201350 pcs): 5\u20139 days. Production (100\u20131,000 pcs): 7\u201312 days. Matched sets (sorted into \u00b10.001 mm bins): add 2\u20133 days. Stainless or ceramic: add 2\u20134 days. Rush production available.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What materials are available?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\"><strong>100Cr6 (SUJ2 \/ GCr15)<\/strong> through-hardened bearing steel HRC 60\u201362 \u2014 the standard choice for spindle preload rings. <strong>42CrMo4<\/strong> induction hardened \u2014 gearbox and industrial applications. <strong>SUS440C<\/strong> hardenable stainless \u2014 clean-room, surgical, semiconductor. <strong>Si3N4 ceramic<\/strong> (HV 1500) \u2014 high-speed motorised spindles where thermal expansion of steel rings would shift the preload. <strong>ZA bronze<\/strong> \u2014 sliding and vibration-damping applications.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">What surface finish is achievable?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">ID \/ OD bearing-fit surfaces: Ra 0.4 \u00b5m standard. Ring faces (bearing-race contact): Ra 0.2 \u00b5m standard, Ra 0.05 \u00b5m lapped on request. Length tolerance: \u00b10.005 mm standard, \u00b10.002 mm precision, \u00b10.001 mm matched-set. Face flatness: \u2264 0.003 mm standard, \u2264 0.001 mm lapped. All measured by contact profilometer and CMM, reported on the inspection certificate.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">Can HXC machine non-standard ring profiles?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">Yes \u2014 beyond plain spacer rings, HXC machines stepped rings (one face larger diameter than the other, for split-race designs), wave-spring grooves cut into the ring, threaded preload nuts integral to the ring, and dual-purpose rings combining preload and seal-retainer functions. Submit your section drawing and we machine to the exact contour.<\/div><\/div>\n          <div class=\"hxc-faq-item\"><button aria-expanded=\"false\" class=\"hxc-faq-q\" onclick=\"hxcFaq(this)\">How do I specify the right preload ring length?<span class=\"hxc-faq-icon\">+<\/span><\/button><div class=\"hxc-faq-body\">The required ring length depends on the bearing pair's contact angle, ball pitch diameter, target preload force, and the housing \/ shaft tolerances. The bearing manufacturer's catalogue gives the preload force vs spacer-length relationship for the specific bearing pair. For new designs, supply the bearing part number and target preload class (Light \/ Medium \/ Heavy per the bearing maker) and HXC will compute and propose the spacer length.<\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between rigid and resilient preload?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Rigid: fixed spacer ring of precise length locks in a fixed preload force \u2014 standard for machine tool spindles, ground to \u00b10.002 mm. Resilient: spring preload maintains consistent force through temperature changes \u2014 better for gearboxes with wide temperature range.\"}},{\"@type\":\"Question\",\"name\":\"Can rings be supplied in matched sets?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes \u2014 sorted into \u00b10.001 mm bins for spindle assembly. Allows exact preload selection during assembly and spindle rebuilds.\"}},{\"@type\":\"Question\",\"name\":\"What happens if bearing preload is too high or too low?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Too high: heat generation \u2192 thermal expansion \u2192 further preload increase \u2192 seizure. Too low: balls skid at high speed \u2192 raceway smearing \u2192 premature failure. Preload ring length must put the assembly inside the bearing maker's preload window.\"}},{\"@type\":\"Question\",\"name\":\"What is the lead time?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Prototype: 3\u20135 days. Matched sets: 5\u20138 days. Production: 7\u201312 days. Ceramic Si3N4 adds 2\u20134 days.\"}}]}\n<\/script>\n\n<script>\nfunction hxcFaq(btn){var body=btn.nextElementSibling;var isOpen=btn.classList.contains('open');btn.classList.toggle('open',!isOpen);btn.setAttribute('aria-expanded',String(!isOpen));body.classList.toggle('open',!isOpen);}\nvar hxcObs=new IntersectionObserver(function(entries){entries.forEach(function(e,i){if(e.isIntersecting){setTimeout(function(){e.target.classList.add('in');},i*90);}});},{threshold:.08});\ndocument.querySelectorAll('.hxc-rv').forEach(function(el){hxcObs.observe(el);});\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-51c1883b e-con-full e-flex e-con e-parent\" data-id=\"51c1883b\" data-element_type=\"container\" data-e-type=\"container\" id=\"hxc-cta\">\n\t\t<div class=\"elementor-element elementor-element-5e4f64bf e-con-full e-flex e-con e-child\" data-id=\"5e4f64bf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-383207df elementor-widget elementor-widget-html\" data-id=\"383207df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- HXCNC CTA Left Panel | namespace .HXCL | Elementor HTML Widget -->\n<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.HXCL{\n  --bg:#F7F9FC;--wh:#FFFFFF;--lt:#EEF3F8;\n  --tx:#1F2937;--tx1:#5B6777;--tx2:#9CA8B4;--bd:#D7E0EA;\n  --a:#2563EB;--a2:#1D4ED8;--aA:rgba(37,99,235,.07);--aC:rgba(37,99,235,.20);\n  --ac:#0F766E;--acA:rgba(15,118,110,.08);--acB:rgba(15,118,110,.15);--acC:rgba(15,118,110,.22);\n  --fh:'Roboto 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Quote.<\/em>\n  <\/h2>\n\n  <p class=\"sub\">Every enquiry includes a DFM review \u2014 tolerance feasibility, material confirmation, and process approach confirmed before production starts. 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-7d3b19df e-con-full e-flex e-con e-child\" data-id=\"7d3b19df\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-41506dd1 elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"41506dd1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" aria-label=\"New Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"1144\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"41506dd1\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"Bearing-Pair PreloadPreload Rings | \u00b10.005 Length \u00b7 \u00b10.001 Matched\" \/>\n\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"1144\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tName\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Name\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-field_12786b6 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_12786b6\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tCompany\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[field_12786b6]\" id=\"form-field-field_12786b6\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Company Name\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_0c79fc0 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_0c79fc0\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tMaterial\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-caret-down\" viewBox=\"0 0 571.4 571.4\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M571 393Q571 407 561 418L311 668Q300 679 286 679T261 668L11 418Q0 407 0 393T11 368 36 357H536Q550 357 561 368T571 393Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_0c79fc0]\" id=\"form-field-field_0c79fc0\" class=\"elementor-field-textual elementor-size-sm\">\n\t\t\t\t\t\t\t\t\t<option value=\"aluminium_6061_t6\">Aluminium 6061-T6<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"aluminium_7075_t6\">Aluminium 7075-T6<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"stainless_steel_304\">Stainless Steel 304<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"stainless_steel_316l\">Stainless Steel 316L<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"carbon_steel_4140\">Carbon Steel \/ 4140<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"titanium_ti_6al_4v\">Titanium Ti-6Al-4V<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"brass_c360\">Brass C360<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"copper\">Copper<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"peek\">PEEK<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"pom_acetal\">POM \/ Acetal<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"nylon_pa6_pa66\">Nylon PA6 \/ PA66<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"ptfe_teflon\">PTFE \/ Teflon<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"polycarbonate\">Polycarbonate<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"abs\">ABS<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"other_not_sure\">Other \/ Not sure<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_161b5ef elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_161b5ef\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tSurface Finish\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-caret-down\" viewBox=\"0 0 571.4 571.4\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M571 393Q571 407 561 418L311 668Q300 679 286 679T261 668L11 418Q0 407 0 393T11 368 36 357H536Q550 357 561 368T571 393Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_161b5ef]\" id=\"form-field-field_161b5ef\" class=\"elementor-field-textual elementor-size-sm\">\n\t\t\t\t\t\t\t\t\t<option value=\"as_machined\">As-machined<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"anodised_type_ii\">Anodised Type II<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"anodised_type_iii_hard\">Anodised Type III (Hard)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"electroplating\">Electroplating<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"powder_coating\">Powder Coating<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"black_oxide\">Black Oxide<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"passivation_ss\">Passivation (SS)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"polishing_ra_requirement\">Polishing \/ Ra requirement<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"other_specify_below\">Other (specify below)<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"Select \">Select finish (optional)<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tAdditional Requirements\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"Target delivery date, critical dimensions, tolerance callouts, inspection requirements, application context...\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-upload elementor-field-group elementor-column elementor-field-group-field_0071b0f elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_0071b0f\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tFile Upload\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input type=\"file\" name=\"form_fields[field_0071b0f]\" id=\"form-field-field_0071b0f\" class=\"elementor-field elementor-size-sm  elementor-upload-field\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg 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axial preload collars \u2014 axial length \u00b10.005 mm (matched sets to \u00b10.001 mm), face parallelism \u2264 0.003 mm, face flatness \u2264 0.001 mm. 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