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Product Category
Ra 0.8 · ≤0.01 Flat · R0.5 Blend · Zero Dead · MOQ 1
FPC / 001 — 010

Tangent-Continuous
Fluid Passage Flow Channel Parts

Custom 5-axis CNC machined fluid passage components — curved guide vanes, irregular flow channels, complex cross-section transitions. Internal Ra 0.8 µm, sealing face flatness ≤ 0.01 mm, all features in one setup, R0.5 mm minimum corner blend radius to eliminate dead angles. For hydraulic manifolds, coolant passages, and precision fluid control systems.

Ra 0.8µm
Internal Ch.
≤0.01mm
Seal Flatness
One Setup
All Features
Get Instant Quote → View Our Work
PART DWG · FPC-001 PASSAGE · Al 7075 · Ra 0.8 · R0.5 ISO 9001 · 5-AXIS · CMM + SCOPE
3D Curved Passage
R0.5 · Zero Dead
FLOW PASSAGE · CUT-AWAY Al 7075 · 3D CURVED · R0.5 · Ra 0.8 ≤0.01 FLAT IN G1/4 OUT B1 B2 R0.5 R0.5 R0.5 R0.5 tangent flow O-RING BS 1806 ✓ ZERO DEAD FULL R BLEND Ra 0.8 scope A CHANNEL · X-SEC Round H8 ◀drilled/bored Rect milledend-mill Variable section5-axis swept Branching treemulti-port MIN BLEND · RADIUS R2.0low-pressure R1.0general R0.5 ◀zero dead-angle R0.3 microspecial tool PASSAGE · TYPE HYD ◀ FOOD COOL AERO MIN 3 mm INT ENDOSCOPE AVAIL MATERIAL · FINISH Al 6061 / 7075 anocooling · hyd SUS316L EP ◀food · pharma Ti Grade 5aerospace PEEKhigh-T / chem Inconel 718high-T flow SCALE 1:1 · MM
Hydraulic · Food · Pharma · Cooling · Aero · Chemical
Applications
Al · SS · Ti · PEEK · Inconel
Materials
48hr Quote · 7-Day Proto · MOQ 1
Service
Ra 0.8µm
Internal Channel
surface finish
≤0.01mm
Sealing Face Flatness
leak-proof surfaces
Zero
Dead Angles
smooth transitions
7 Days
Fastest Delivery
prototype orders
Why It's Difficult

Fluid Passage Machining Challenges

Internal flow channels with smooth transitions, variable cross-sections, and leak-proof sealing faces require 5-axis access, long-reach tooling, and controlled surface quality throughout the entire passage.

🌊
Smooth Transition Geometry
Abrupt section changes create turbulence, pressure drop, and cavitation. HXC programmes tangent-continuous toolpaths at all section transitions — the tool follows the curvature change without lifting, producing a smooth geometric transition.
🔒
Sealing Surface Integrity
Fluid passages must seal — O-ring grooves, flat sealing faces, and thread interfaces must all be accurate. HXC machines sealing faces to ≤ 0.01 mm flatness and O-ring grooves to seal manufacturer's dimensional specifications.
⚠️
Dead-Angle Elimination
Stagnant zones in flow channels cause contamination buildup in food/pharma applications and reduce efficiency in hydraulics. We design and machine full radius corner transitions to eliminate dead angles — minimum corner radius R0.5 mm.
Our Work

Fluid Passage Parts We've Made

Curved guide vanes, internal flow channels, and hydraulic manifolds — smooth internal surfaces, leak-tested.

Request Similar Part →
Hydraulic Manifold Complex PassagesAl 7075 · Manifold
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Internal Ra 0.8µm · 15 pcs
Chemical Flow Guide VaneSUS316L · Chemical
Chemical Flow Guide Vane
Curved passage · 10 pcs
Coolant Distribution PassageAl 6061 · Coolant
Coolant Distribution Passage
6 channels · 30 pcs
Aerospace Fuel Flow PassageTi Gr5 · Aero
Aerospace Fuel Flow Passage
Complex section · 5 pcs
Food-Grade Flow ChannelSUS304 · Food
Food-Grade Flow Channel
Sanitary · Ra 0.4µm · 20 pcs
Pharmaceutical Flow PassagePEEK · Pharma
Pharmaceutical Flow Passage
PEEK · Cleanroom · 8 pcs
Water Cooling Flow GuideAl 7075 · Water
Water Cooling Flow Guide
Compound curve · 25 pcs
Hydraulic Control Passage BlockSUS316L · Hydraulic
Hydraulic Control Passage Block
Precision ports · 12 pcs
Capabilities & Tolerances

What We Can Deliver

Typical specifications — confirm exact requirements at enquiry.

Min passage width3 mm internal
Min corner radiusR0.5 mm
Surface finish (flow)Ra 0.8 µm standard
Surface finish (food)Ra 0.4 µm, crevice-free
Sealing face flatness≤ 0.01 mm
O-ring groove standardBS 1806 / Parker / custom
MaterialsAl, SS, Ti, PEEK, Inconel
Machining5-axis simultaneous
Pressure testAvailable on request
InspectionCMM + internal surface check
Lead time (proto)7–10 days
Lead time (batch)12–18 days
How It Works

From Drawing to Finished Part

Upload your 2D/3D file — DFM feedback, toolpath planning, and confirmed lead time within 48 hours.

01
Upload Drawing
STEP, IGES, DXF or PDF. Include surface quality and tolerance callouts.
02
DFM & Toolpath
Free DFM — undercuts, thin walls, flow path access, surface strategy.
03
5-Axis & QC
5-axis CNC, in-process probing, CMM + endoscope inspection.
04
Ship Worldwide
Full dimensional report enclosed. DHL / FedEx / sea freight.
Reviews

Trusted by Engineers Worldwide

★★★★★
"Blade profile accuracy was exceptional — every part passed our incoming CMM check first time. Surface finish on the flow surfaces exceeded our Ra 0.4 µm specification."
AK
Alex K.
Fluid Systems Engineer · Germany
★★★★★
"HXC understood the 5-axis toolpath challenges immediately. Their DFM feedback caught an undercut issue we had missed. Lead time as quoted."
SL
Sophie L.
Design Engineer · France
★★★★★
"We've run three production batches of complex curved parts through HXC. Dimensional consistency batch-to-batch is the best we've seen from any supplier."
JT
James T.
Senior Procurement Manager · UK
FAQ

Fluid Passage Flow Channel — FAQ

Engineering and procurement questions answered by our 5-axis machining team.

Yes — HXC machines 3D curved internal flow channels with variable cross-section using 5-axis simultaneous machining. Channels may be straight, curved, helical, or branching. All internal surfaces are machined to Ra 0.8 µm. Minimum accessible channel dimension: 3 mm width. For channels below 3 mm, gun drilling is used for straight sections.
Smooth transitions are achieved by: (1) Tangent-continuous CAM toolpaths — the tool follows the surface curvature change without lifting (no faceted transitions); (2) Blend radius programming — all section transitions are machined with a defined blend radius (minimum R0.5 mm); (3) Surface continuity verification — the finished channel is scanned optically or by CMM probe to verify G1 or G2 continuity at all transitions.
Yes — HXC machines all sealing faces, O-ring grooves, port threads, and internal channel geometry in a single 5-axis setup referenced to a common datum. This ensures the sealing face is perfectly perpendicular and positioned relative to the channel geometry — critical for leak-free assembly. Sealing face flatness ≤ 0.01 mm. O-ring groove dimensions verified by CMM.
Verification methods: (1) CMM with articulated probe for accessible internal surfaces; (2) Optical endoscope inspection for surface quality deep inside channels; (3) Pressure test (hydrostatic or pneumatic) to verify sealing integrity — available on request. For food-grade parts: borescope images of all internal surfaces are provided with the inspection report.
Hydraulic systems: Ra 0.8 µm — prevents cavitation and erosion at velocity transitions. Food/pharma: Ra ≤ 0.4 µm, crevice-free, passivated — meets 3-A and GMP hygienic design standards. Aerospace fuel: Ra 0.8 µm on flow surfaces, Ra 0.4 µm on sealing faces. General industrial: Ra 1.6 µm acceptable for non-critical flow paths.
Yes — anodize penetrates all internal surfaces including blind passages, provided the electrolyte can drain. HXC drills drain/vent holes at low-point geometries before anodizing, then plugs them after if required. For passages where complete fluid drainage is uncertain, electroless nickel plating (uniform coverage, no drain requirement) is recommended as an alternative.
MOQ is 1 piece. HXC regularly produces single-piece development prototypes for fluid system validation. DFM review on new passage designs is free — upload your STEP file and we'll flag any geometric features that would trap coolant, create dead angles, or cause inspection difficulties.
Prototype (complex curved passages, new toolpath): 7–10 days. Small batch (10–50 pcs): 10–16 days. Production: 14–22 days. Food-grade with Ra 0.4 µm and passivation: add 3–4 days.
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Send Your Drawing.
Get a Quote.

Every enquiry includes a DFM review — tolerance feasibility, material confirmation, and process approach confirmed before production starts. MOQ 1 piece.

24hr
Quote Response
MOQ 1
Prototypes OK
ISO
9001:2015
📐
DFM Review on Every Enquiry
Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback — not generic pushback.
🎯
First Article Inspection — Standard
FAI report on every new run. Material certs and surface treatment certs included with every shipment.
🔄
Same Process: Prototype to Production
Process plan from your prototype applies to production batches. No re-qualification when you scale.
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3 / 4 / 5-Axis CNC + Turning
Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.
ISO 9001:2015 3/4/5-Axis Milling CNC Turning CMM Inspection Global Delivery