In fact, the reducer is an independent part composed of gear transmission, Worm drive, and gear Worm drive enclosed in a rigid housing, which is often used as a reducer between the driving part and the working machine. It plays a role in matching speed and transmitting torque between the prime mover and the working machine or actuator, and is widely used in modern machinery. However, during our use, there was a phenomenon of the gearbox bearing making noise during the deceleration process. Below, the editor of Xianji Network will introduce the reasons for the gearbox bearing making noise.