We produce gearbox, Hardened cylindrical gear reducer , gears, shafts, etc. 1. This ... high strength low carbon steel made by carburizing and quenching, tooth surface hardness of HRC58-62, CNC gear grinding processes are ... .ZFY250.ZFY280.ZFY320.ZFY360.ZFY450. ZFY500.ZFY560.ZFY630.ZFY710.ZFY800We produce gearbox, Hardened cylindrical gear reducer , gears, shafts, etc. Hardened cylindrical ...