Hangzhou Hangtian Speed Variator Co., Ltd. is a company producing worm gear speed reducer of Hangsu brand and other products of the same range. The company owns advanced manufacturing and testing equipments with a technology level ahead of its competitive companies in the world. Thanks to ten years of efforts, the company has nurtured a well-known brand name, and cultivated a team of employees with pioneering spirits. Our company specializes in the production of "Hang-speed" brand worm gears, lifts, NMRV (NRV) gears and other products, with internationally advanced manufacturing and testing equipment. Our business philosophy is "strong, innovative, efficient and realistic". Our company has introduced advanced testing equipment from the United States, Japan, France and other countries and regions, and has passed ISO9001:2008 international quality management system certification. Our main products are worm gear reducers, Cycloid reducers, coupling screw lifts, textile twister gears, auto steering gears and special gears, totally thousands of kinds of specifications. Our products are sold to many countries and regions, enjoying good popularity among customers. "Innovative, never satisfied" is the "Hang-speed" pursuit of our company.