Custom High-Precision CNC Machining for Industrial & Automotive Mandrels

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).

Engineering Absolute Stability: High-Concentricity Mandrels for Next-Gen Power Systems

In the world of high-speed rotation, precision isn’t just a goal—it’s a requirement. CAIYI stands at the forefront of this necessity, engineering ultra-high concentricity precision mandrels that serve as the backbone for rotational accuracy in advanced motor and battery assemblies. By leveraging cutting-edge multi-axis CNC turning and specialized grinding technologies, we deliver mandrels that virtually eliminate mechanical vibration, thereby safeguarding the structural integrity and longevity of your most critical systems.

Technical Excellence & Performance Advantages

Unrivaled Concentricity & Dynamic Balance: We execute rigorous CNC quality protocols to ensure flawless concentricity across the entire shaft. This meticulous attention to detail proves vital for high-speed motor applications, where even a microscopic deviation can trigger catastrophic system failure.
Next-Generation Material Science: We empower your designs with a curated selection of premium stainless steel and high-strength alloy steels. This strategic choice provides a perfect synergy of mechanical toughness and corrosion resistance, specifically tailored to withstand the punishing environments of New Energy Vehicle (NEV) powertrains.
Optimized Structural Integrity: Our engineers have perfected a multi-step design featuring precision-machined positioning ends and integrated flanges. By combining a robust solid core with stress-reducing rounded contours, we significantly boost the component’s endurance under extreme mechanical loads.
Superior Surface Refinement: Beyond dimensional accuracy, every mandrel undergoes intensive precision turning and polishing. This results in an ultra-smooth finish that dramatically reduces friction, prevents premature wear on mating components, and facilitates a seamless, high-efficiency assembly process.

Bespoke Engineering for Your Global Blueprint

Fully Adaptive Geometry: We offer a limitless range of customizable dimensions. Whether your project demands specialized length-to-diameter ratios for unique motors or complex flange geometries, our multi-axis CNC facility translates your blueprints into reality with clinical precision.
Stringent Quality Benchmarking: To ensure total reliability for high-volume wholesale orders, our QA team inspects every batch for exacting dimensional tolerances and surface integrity. We don’t just meet standards; we set them.
Optimized for the NEV Revolution: We have fine-tuned our manufacturing processes to meet the specific thermal and chemical rigors of modern battery systems. At CAIYI, we provide the hardware that drives the future of clean energy.