Worm and Worm Gear, Timing Pulley, Gear Shaft manufacturer / supplier in China, offering CNC Machined Standard and Special Steel Spur Transmission Gear for Industrial Usage, Professional Manufacturers Industrial High Precision Grinding Gear 1-10 Mold Mechanical Gear Transmission Gear, Sprocket C45 Steel Various Products (DIN/ANSI/JIS Standard or made to drawing) Transmission Parts Hardened Tooth Sprocket and so on.