Applicable scope Suitable for gear hobs made of high-speed steel/hard alloy materials (precision rolling, pre shaving, pre grinding, pre scraping, scraping), worm gear hobs (including tangential direction), involute/triangular/rectangular spline hobs, sprocket hobs, synchronous pulley/die hobs, insert hobs, annular buckle hobs, multi segment arc gear hobs, formed special hobs and milling cutters.