Diameter Tolerance：D≤4  0~-0.01     4<D≤6  0~-0.012    6<D≤10  0~-0.015    10<D≤20  0~-0.018

Spherical Tolerance：R≤3    ±0.005    R＞3   ±0.008

Tolerance of arc angle：R＜0.5  ±0.003    R≥0.5  ±0.005

Excellent performance and cost-effective. Comparable to the quality of Europe, America and Japan.

Selection of 0.3μm imported ultra-micro carbide materials, high-speed processing of high hardness material life longer.

Higher surface finish when processing optical moulds, better wear resistance when processing high hardness materials.

Special tool design, high precision tolerance and quality control.

Oil mist, emulsion or air cooling is recommended.

Semi-finishing and finishing.