Helical Gear, Bevel Gear, Spur Gear,transmission gear.ring gear.worm shaft.Motor Gear.Worm Shaft.1. Materials: Brass, aluminum alloy, carbon steel, stainless steel.2. Dimension: As drawing.3. Process: Cutting, hobbing, lathe machining, grinding, broaching, thread rolling and so on.4. Hardness: As...