... steel.Heat treatment.CNC machined as per ordered spec Gear ShaftPrecision Gear Shaft with tight diameter accuracy in 303, 316, 17-4 ... Custom precision ground shafts are available in different materials and with retaining ring grooves, bearing journals, flats, special lengths etc ... , alloy steel,aluminum,cold rolled steel with various plating;3.Surface treatment of Gear Shaft: kinds of plating(Zinc,Nikel ...