CNC Machined Stainless and Brass Automotive Spare Parts
This service produces replacement and custom automotive spare parts in stainless steel, aluminum and brass, using CNC milling, drilling and broaching. Typical parts are spacers, adapters, couplers, sensor fittings and small housings that are no longer available or need modification. It suits repair shops, restoration specialists and parts distributors who work from samples or drawings.
- Material
- Stainless Steel
- Tolerance
- to ±0.005 mm
- MOQ
- 1 piece
- Prototype lead time
- 3–7 days
- Spare parts made from drawings or measured samples
- Broached splines and keyways for shaft fits
- Stainless, aluminum and brass in one order
- Single-piece restoration parts welcome
Item ref. 1600394030730 ·
| Process | CNC milling, drilling, broaching, press-fit assembly |
|---|---|
| Materials | Stainless steel 304/316, aluminum 6061, brass C36000 |
| Surface Finish | Bead blasting, passivation, anodizing, nickel plating |
| Tolerance | ±0.05 mm standard; down to ±0.005 mm on critical features |
| MOQ | 1 piece; prototypes through mid-volume runs |
| Drawing Formats | STEP, IGES, X_T, STL, DWG, DXF, PDF |
| Lead Time | Prototypes typically 3–7 working days; production usually 10–20 |
| Inspection | FAI, in-process checks, 100% critical dimensions; CMM |
Manufacturing
How we make this part
Process, material options and inspection for cnc machined stainless and brass automotive spare parts.
Where no drawing exists, a sample part can be measured and modeled before machining, though functional dimensions should be confirmed by the buyer. Parts are then milled and drilled on 3-axis centers, with internal splines or keyways broached to fit shafts. Multi-material assemblies, such as a brass insert in an aluminum body, are machined separately and press-fitted.
Stainless steel 304 is chosen for exposed fittings that must not rust; aluminum 6061 for light housings and spacers; brass C36000 for fluid fittings and parts that need low friction or good conductivity. Finish choices include bead blasting and passivation for stainless, anodizing for aluminum, and nickel plating for brass. Matching original appearance is often as important as fit in restoration work.
Each part is checked against the drawing or reference sample, with critical fits and threads inspected before dispatch. First-article approval is recommended for reverse-engineered parts. Common uses include classic car restoration parts, wheel spacers, coolant fittings, throttle linkage parts, sensor adapters and replacement brackets for low-volume or discontinued models where no stock part exists.
FAQ
Frequently asked questions
Can you make a spare part from an old sample without a drawing?
Yes. We measure the sample and create a model or drawing for your approval before machining. Worn surfaces and unknown materials are the main risks, so please tell us which dimensions are critical and the original material if known. We then machine a first article for fit check before any batch.
What does broaching add to an automotive part?
Broaching cuts internal keyways, splines and hex or square holes that drills and end mills cannot form with sharp corners. It is used for parts that must transmit torque from a shaft, such as couplers, gears and adapters. The result is an accurate, repeatable internal profile in one pass.
How do I get a quote for cnc machined stainless and brass automotive spare parts?
Send a 3D model (STEP or IGES) and a 2D drawing with tolerances, material, finish and quantity through the quote form or by email. An engineer replies within 24 hours on business days with price, lead time and any DFM suggestions.
Request a quote
Quote this part
Attach drawings or send several parts at once from the full quote form.
- Emailinquiry@machined-parts-factory.com
- WhatsApp+86 176 2154 1688
- Phone+86 176 2154 1688
- HoursMon–Sat, 08:30–18:00 China Standard Time (UTC+8)