We Are Your Reliable Supplier on Automotive Parts

CNC precision machined parts for new energy vehicles: motor housing, water-cooled heat sink base, reducer housing, precision shaft sleeves, valve housing, mounting brackets, flange plates, pump assemblies and other components for automotive power & thermal management systems.

Material, Function & Technical Specifications

Materials

- Aluminum Alloy 6061/6063/7075/A380: motor housing, water cooling base plate, reducer shell, heat dissipation cavity. Lightweight and high thermal conductivity; anodized for wear and corrosion resistance.

- Oxygen-free Copper: thermal & conductive components for cooling channels. High thermal & electrical conductivity, low oxygen content for EV thermal management.

- Stainless Steel SUS304/SUS316/416: shaft sleeves, valve parts, pin shafts. High pressure resistance, corrosion resistance and stable dimension.

Function

Applied to drive motors, reducers and liquid cooling thermal management systems of new energy vehicles. Responsible for structural load bearing, fluid sealing, heat conduction, power transmission and positioning assembly. Ensure stable power output and efficient heat dissipation under vehicle vibration and alternating high & low temperature working conditions.

Technical Parameters

Dimensional Tolerance: ±0.005~±0.02 mm for critical sealing & fitting dimensions; ±0.03~0.05 mm for general structural dimensions.
Geometric Tolerance: Coaxiality of bearing position ≤0.004 mm; parallelism & perpendicularity of mounting surface ≤0.006 mm; end circular runout ≤0.005 mm.
Surface Roughness Ra: Ra0.4~0.8μm for sealing & bearing mating surfaces; Ra1.6μm for cooling channel surfaces; Ra1.6~3.2μm for non-mating cosmetic surfaces.
Surface Treatment: Hard anodizing / natural anodizing / conductive anodizing for aluminum; passivation for stainless steel; oxygen-free copper polishing & anti-oxidation treatment; micro-arc oxidation optional for sealing surfaces.
Performance: Lightweight, anti-vibration fatigue. Water cooling cavity passes hydraulic & air tightness test, no porosity, resistant to temperature cycling, meets automotive reliability standards.

Why Customers Choose Us & Technical Problems We Solve

Machining of thin-wall housing & complex cooling channels: EV housings feature thin walls and intricate internal cooling passages, which are prone to deformation and cause sealing failure. Our custom fixtures and stress-relief process minimize distortion, guarantee channel precision and sealing performance to pass air & hydraulic pressure test.
One-stop multi-material manufacturing: We produce aluminum, stainless steel and oxygen-free copper components in one factory. Customers do not need to manage multiple suppliers, reducing inconsistent quality and supply chain cost.
Strict automotive reliability standards: Auto parts must withstand long-term vibration, temperature fluctuation and humid environment. Our mature surface treatment stabilizes surface finish to meet anti-corrosion, wear resistance, heat dissipation and sealing requirements, complying with IATF16949 automotive quality standard.
Smooth transition from prototype to mass production: Fast prototype service for rapid verification during EV iteration, and seamless ramp-up to mass production to shorten customer product development cycle.
Traceable quality control: Inspection records preserved for every batch. Test reports available for shipment to meet traceability requirements of OEM customers.

Machining Processes & Equipment

Machining Process

Raw material cutting → CNC rough machining → Stress relief aging → CNC finishing → Precision drilling, tapping & cooling channel machining → Deburring, chamfering & cleaning → Surface treatment (anodizing/passivation/polishing) → Air tightness / hydraulic pressure test → Final inspection, cleaning & anti-rust packaging

Production Equipment

5-axis CNC machining center, 4-axis CNC center, 3-axis milling machine, CNC lathe, turn-mill composite machine, precision cylindrical grinder, automatic deburring machine

Inspection Equipment

Coordinate Measuring Machine (CMM), 2D optical image measuring instrument, surface roughness tester, height gauge, micrometer / bore micrometer, dial gauge, hardness tester, salt spray tester, air tightness tester, hydraulic pressure tester