Gearbox, Reducer, Sprocket manufacturer / supplier in China, offering High Speed Ratio Planetary Reducer Worm Gear Design Slewing Drive Reducer for Solar Tracker with 24V DC Motor, American Standard Sprockets with Qd Bushings 35 35-1 35-2 41 40 40-2 40-3 50 50-2 50-3 60 60-2 60-3 80 80-2 80-3 100 100-2 100-3 120 140 160 200, American Standard Double Pitch Sprockets 2040/2042 2050/2052 2060/2062 2080/2082 and so on.