Gearbox, Reducer, Sprocket manufacturer / supplier in China, offering Factory Ratio 55: 1 Worm Gear Design Planetary Gearbox Motor Slewing Drive Reducer for Solar Tracker with 24V DC Motor, Ratio 50: 1 Solar Tracking Worm Gear Planetary Motor Gearbox Reducer Slewing Drive, China Manufacturer Tower-Style Stable Performance Planetary Slewing Drive Rotary Reducer for Solar Energy Tracking Systems and so on.