High concentricity precision mandrel, CNC machined for mechanical and automotive use

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).

Material: 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.

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

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

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

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

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