Worm and Worm Gear, Timing Pulley, Gear Shaft manufacturer / supplier in China, offering High Precision Helical Gear for Industrial Machinery with ISO 9001 Certified, Heavy-Duty Taper Bush for Industrial Gear Systems with ISO 9001 & CE Certified, Cast Iron Pulley SPA, Spb, Spc, Spz 3V 5V 8V V Belt Pulley and so on.