Profile: Hangzhou Chinabase Machinery Co. Ltd. is a supplier of power transmission products. We offer chain sprockets, belts, couplings, pulleys, gear racks, gearboxes, motors, and many other power transmissions products. Our shaft collars include solid shaft collars, single & double split collars, threaded bore split collars, inch Series shaft collars, metric series shaft collars and set screw style collars. We offer a wide variety of couplings such as china couplings, jaw couplings, flexible couplings, HRC couplings, NM couplings, pin couplings, spacer couplings, flange couplings, sleeve couplings and nylon sleeve coupling.