Profile: Sino Hydraulic Drives and Transmissions Ltd. is a designer and manufacturer of hydraulic winches, planetary gearboxes and hydraulic motors. We are an ISO 9001 certified company. We offer NAM and GM series radial piston hydraulic motors. Our hydraulic winches include hoisting winch HW & NHW series. These winches are used in the manufacture of cranes, aerial devices, processing plants & oilfield rigs. Our NHW hydraulic winch consists of shuttle valve and counter balance valve, which keeps the load from dropping, and maintains stable loading & unloading. We also supply GFB series swing drives, winch drives and GFT series travel drives.