... rotate speed can achieve 8000rpm. Heat resistance is 700°c~800°c.3.AlTiN-S coating, golden coating, applicative to high speed machine ... . Machine rotate speed is 8000rpm~20,000rpm, heat resistance is 1000°c~1200°c ... drill bit, grain size 0.2um, Co9%, HRC65~68, AlTiN-S coating, Sandvik material, for high speed cutting.8.Other products ...