Z=56 m=3 material: 20CrMnTi ProductsAll kinds of gears (spur gear, bevel gear, sprial gear, ring gear, internal gear, sprocket, chain wheel) transmission, gear box, reducer ,shaft and ... .ModuleNormal modal is between 1.5~10ProcessingPrecision hot and cold forging, precision machining and roll forming.Heat TreatmentAnnealing, normalizing, carbonitriding, carburizing ...