New Energy Precision Spindle Shaft mandrel for EV Motor & Battery Systems CNC Machined

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).

This mandrel is made of stainless steel or alloy steel, balancing strength, wear resistance, and corrosion resistance, making it suitable for new energy system environments.

The structure features a multi-step design, including a positioning end, flange, and long shaft section, achieving precise assembly and stable support.

Flexible size range; length and diameter can be customized to meet different motor and battery system applications.

Solid internal structure combined with a well-designed rounded corner design effectively reduces stress concentration and extends service life.

The surface undergoes precision turning and polishing, providing excellent smoothness and wear resistance.

CNC precision machining and strict quality control ensure high concentricity and stable operation.