High Precision CNC Turning OEM Automotive Mandrel Shaft

OEM Automotive Mandrel Shaft High Precision CNC Turning Parts Manufacturer

1. Material: Stainless steel (304/316), alloy steel (40Cr/42CrMo), etc.

2. Structural Shape: Upper end: short positioning shaft (assembly guide), middle: flange step (stop/positioning), lower end: long shaft section (main functional section).

3. Size Range: Total length: 10 – 100 mm, shaft diameter (spindle): Φ6 – Φ12 mm, flange diameter: Φ12 – Φ25 mm.

4. Internal Design: Solid structure, no obvious internal bore, rounded corners (R-angle), H7/g6 fit, end chamfering.

5. Surface Treatment: Precision turning + polishing + grinding + electropolishing (stainless steel) + blackening (alloy steel) + nickel/chrome plating (wear-resistant and corrosion-resistant) + nitriding (improved wear resistance).

6. Manufacturing process: Blanking (bar stock), CNC turning (rough machining), finish turning (forming steps), heat treatment (if required), external cylindrical grinding (to ensure concentricity), polishing/surface treatment, and inspection (concentricity/dimensions).

High-Precision CNC Solutions for Automotive Mandrel Shafts

At CAIYI, we specialize in the manufacturing of the OEM automotive mandrel shaft, providing the high-precision core components required for the next generation of electric and autonomous vehicles. Our CNC turning expertise allows us to meet the most rigorous automotive standards, ensuring that every shaft provides reliable support and perfect alignment in demanding industrial environments.

Key Technical Advantages:

Micron-Level CNC Turning Accuracy: We achieve superior concentricity and dimensional stability through high-speed CNC processes. This precision reduces mechanical friction and noise in motor systems, significantly improving overall energy efficiency.
Exceptional Durability in Extreme Conditions: Engineered for the “under-the-hood” environment, our mandrel shafts resist wear, high temperatures, and oxidative stress. This ensures structural integrity throughout the vehicle’s entire service life.
Optimized for EV and Relay Systems: Whether for EV traction motors or sensitive relay switching systems, our shafts provide the stable performance needed for high-frequency operations and complex battery module assemblies.
Strict Quality Control Protocol: We implement a zero-defect manufacturing philosophy. Every batch undergoes rigorous inspection to ensure consistent quality and repeatability, making us a trusted partner for global Tier 1 automotive suppliers.

Full OEM/ODM Customization Support:

Bespoke Material Selection: We work with a variety of materials, including high-grade stainless steel, alloy steel, and carbon steel, tailored to your specific strength and conductivity requirements.
Custom Surface Engineering: To enhance performance, we offer multiple surface treatments such as heat treatment, precision grinding, and specialized plating for corrosion resistance.
Engineering Partnership: From initial drawings to mass production, our team provides DFM (Design for Manufacturing) insights to help you reduce costs without compromising on quality.