Gear reducer, also known as speed reducer or gear box, is a combination of sets of gear in the gearbox and found a shaft and bearings, gathered in a closed metal shell. Abstract gear reducer is to convert the input and output speeds, a known increase in the output torque to reduce speed. Gear reducer is suitable for machine tools to set different speeds, different processing requirements. Common types of gear reducer pulleys used double different diameters, transmission, and strengthen the electric motor. The most common include reducer: worm gear, bevel gear reducer, helical gear reducers, parallel shaft gear reducer etc ... welcome!