CNC Machining for Automotive

Precision CNC components for powertrain, chassis, and electrical systems. Fast prototyping and volume production to automotive quality standards.

Our advantages

Why Choose RuoChen Precision for Automotive

We deliver high-precision, traceable parts that meet automotive tolerances and production schedules.

  • Quality Control

    Automotive-grade inspections, PPAP-ready documentation, and 100% critical dimension checks.

  • Advanced Equipment

    Multi-axis mills and turning centers achieve tight tolerances and complex geometries.

  • Engineering Support

    DFM, tolerance optimization, and process planning to reduce cost and speed validation.

  • On-time Delivery

    Kanban and JIT production, batch traceability, and reliable global shipping.

Application Areas

Automotive Application Areas

    Components we machine across drivetrain, body, and electrical systems.


    • Engine brackets, mounts, and timing components
    • Transmission housings, shafts, and gear carriers
    • Brake system components (caliper pistons, carriers)
    • Steering and suspension parts (knuckles, control arms)
    • EV motor housings, rotors, and shaft assemblies
    • Battery mounting hardware, busbars, and covers
    • Sensors, actuator housings, and connector interfaces
    • Prototype parts and low-volume production runs
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application

Typical Parts for Automotive

  • Transmission Components

    Precision shafts, gears, and housings machined to tight concentricity and finish requirements.

    4140 / 17-4 PH stainless / 7075-T6
  • Engine & Powertrain

    Cylinder heads, valve guides, and oil pump components with high-heat and wear resistance.

    Cast iron / 4130 steel / 6061-T6 aluminum
  • Electrical & EV Parts

    Motor shafts, housings, and battery hardware with precision electrical contact features.

    Anodized 6061 / copper (C101) / 304 stainless
process

Our Service Process

  • Blueprint
  • Setup
  • Production
  • Finishing
  • Delivery
  • Blueprint

    Drawing Review & Cost-Effective Tolerances

    We review your automotive part drawings and 3D models to confirm functional tolerances and manufacturability. Our engineers help balance precision and cost for powertrain, chassis, and EV components.

    • Check GD&T, fits, and functional requirements
    • Propose tolerance optimization to reduce machining cost
  • Setup

    CNC Programming & PPAP-Ready Planning

    Our team programs CNC machines, defines tooling and fixtures, and prepares inspection plans aligned with automotive PPAP requirements for prototype or volume production.

    • CAM programming for shafts, housings, and brackets
    • Control plans and sample layouts for automotive approval
  • Production

    Stable Machining for Volume Runs

    Components are machined on multi-axis equipment with stable processes suitable for repeated batches. Inline inspections ensure every lot meets automotive quality standards.

    • High-efficiency machining for shafts, housings, brackets
    • SPC and in-process checks for key characteristics
  • Finishing

    Heat Treatment & Corrosion Protection

    We coordinate heat treatment, plating, and surface finishing for wear and corrosion resistance. Each lot passes final dimensional and visual inspections before packing.

    • Heat-treated and plated parts for durability and appearance
    • Final inspection before release for assembly lines
  • Delivery

    JIT-Friendly Logistics

    Parts are labeled, packed in returnable or disposable containers as required, and shipped according to your schedule. We support JIT and Kanban deliveries to keep production running smoothly.

    • Batch identification and barcode labeling
    • Palletized packaging ready for truck loading
Services

Our Machining Capabilities

We provide end-to-end CNC machining services to support your project from prototype to mass production.

Material

Materials & Surface Treatment

We machine a wide range of automotive alloys, from steels to aluminum and copper alloys. Finishes include anodizing, plating, passivation, and precision polishing to meet corrosion and appearance requirements.

  • Material selection focused on strength, fatigue resistance, and corrosion protection; heat treatment available. 
  • Finishes: anodize, black oxide, zinc/nickel plating, electroless nickel, passivation, polishing and precision deburring.
Discuss Your Project

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