... , alloy steel, stainless steel, aluminium, bronze, brass, cold rolled steel cast iron ,iron 2.Normal modul is between 1 ... of products include fan wheel, pump impeller ,transmission gear ,and any other gears suitable train or auto 6 ... , procesion machining and roll forming ,precision shot peen gear faces and roots to in crease load capacity 7 ... We are looking forward to our cooperation! machining gear