Material: C45# steel,40Cr,20CrMnTi,20Mn,Alloy Steel, 20MnTi, Cast Iron etc. Process: Forging, Machining, Hobbing, Milling, Shaping, Shaving, Grinding, Heat treatment. Heat treatment: High frequency quenching, heat treatment, hardened teeth Surface treatment: Blacking, galvanization, chroming, electrophoresis, or customer requirement HrC: 20CrMnTi - carburization -(58~62) C45# steel - high frequency -(40~45) Performance: High precision, high wear resistance, low noise, smooth and steady, high strength Model number: Standard or nonstandard Application: Tractor , feeding machinery , harvester , mining machinery etc.