The reducer is an independent component composed of a gear drive, a worm drive, and a gear-worm drive enclosed in a rigid housing. It is often used as a deceleration transmission device between the moving part and the working machine. It plays a role in matching the rotation speed and transmitting torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

The reducer is generally used in low-speed high-torque transmission equipment. The motor, internal combustion engine or other high-speed power is passed through the gear with a small number of teeth on the input shaft of the reducer to mesh with the large gear on the output shaft.The reducer will also have several pairs of gears with the same principle to achieve the desired reduction effect. The ratio of the number of teeth of the large and small gears is the transmission ratio.

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