We Are Your Reliable Supplier on Shaft & Pin Parts
CNC precision machined shaft parts: precision mandrels, stepped shafts, locating pins, eccentric shafts, spline shafts, connecting tie rods, guide shafts, floating joint pins, drive shafts and other rotary components.
Material, Function & Technical Specifications
Materials
Stainless Steel SUS304 / SUS316 / SUS420 / 416: general precision shafts & pins, excellent corrosion resistance and stable dimension.
45# Steel / 40Cr: heavy-duty transmission shafts. Quenching & tempering available to improve hardness and wear resistance.
Aluminum Alloy 7075 / 6061: lightweight short shafts & connecting pins, balancing low weight and mechanical strength.
Oxygen-free Copper: conductive & thermal transfer shafts for heat & electric conduction scenarios.
Function
Core rotary, transmission and positioning components widely used in robots, automation equipment, automotive and medical devices. Responsible for torque transmission, guiding, hinged rotation and load bearing. Ensure smooth rotation, stable clearance, wear resistance and durability under cyclic load.
Technical Parameters
- Dimensional Tolerance: ±0.003~±0.01 mm for mating shaft diameter; ±0.02~0.04 mm for non-mating structural dimensions.
- Geometric Tolerance: Cylindricity ≤0.002 mm, coaxiality ≤0.003 mm, straightness ≤0.002 mm, circular runout ≤0.003 mm.
- Surface Roughness Ra: Ra0.2~0.4μm for sliding mating surfaces; Ra0.8μm for general rotary surfaces; Ra1.6~3.2μm for non-mating surfaces.
- Surface Treatment: Stainless steel passivation & polishing; carbon steel quenching, tempering and hard chrome plating; aluminum anodizing; oxygen-free copper polishing & anti-oxidation treatment.
- Performance: High roundness, low friction, anti-fatigue, burr-free, long-term dimensional stability, suitable for high-frequency reciprocating rotation.
Why Customers Choose Us & Technical Problems We Solve
Deformation control for slender shafts: Slender shafts tend to bend and exceed runout tolerance. We adopt follow rest fixtures, staged cutting and stress relief process to minimize bending, guarantee coaxiality and runout for smooth rotation without jamming.
Complex multi-feature machining: Integrated multi-step, flat, slot, thread and knurling features finished in one clamping, eliminating positioning error caused by repeated re-clamping.
Strict surface roughness control: Precision grinding and mirror polishing for sliding surfaces reduce friction coefficient and extend service life.
One-stop heat treatment & surface finishing: Quenching, tempering and plating available in our supply chain. Avoid inconsistent quality from multiple outsourced processes.
Traceable quality management: Support rapid prototyping and mass production. Certified by ISO9001 & IATF16949. Inspection reports provided per batch for high-reliability industries such as automation, automotive and robotics.
Machining Processes & Equipment
Machining Process
Raw material cutting → CNC rough turning → Stress relief heat treatment → CNC finish turning → Milling flat / slotting / knurling / tapping → Cylindrical grinding →Deburring & cleaning →Surface treatment (quenching/plating/passivation/polishing) → Final inspection, anti-rust packaging
Production Equipment
CNC Swiss lathe, CNC lathe, turn-mill composite machine, cylindrical grinder, centerless grinder, CNC machining center, milling machine, automatic deburring machine
Inspection Equipment
Coordinate Measuring Machine (CMM), roundness tester, 2D optical image measuring instrument, surface roughness tester, micrometer, lever dial gauge, coaxiality & runout tester, hardness tester, salt spray tester
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