Worm and Worm Gear, Timing Pulley, Gear Shaft manufacturer / supplier in China, offering High Precision C45 Steel Customized HRC Coupling for Mining Equipment with ISO9001, High Quality Cast Iron HRC Coupling 110/130/150/180/230/250 for Industrial Equipment, Source Factory High Quality Cast Iron HRC Three-Claw Type Coupling 130/150/180/230/280 with ISO9001 and so on.