... : Carburization and the hardness cuold be reached HRC58-623) Gear Mould no.: 0.3~154) Teeth profile: Spur,Helical ... ,Worm,Spiral or other types 5) Use application: gear box for steelworks Product TypeCNC hobbing gearMaterial:42CrMo, 20CrMnMo, ... compressors,Industrial equipments, transmission parts, etc.Our services:CNC Machining, Milling, Stamping, Sheet metal fabricating, and Die-Casting