The noise of the PC gearboxes in the gear reducer has a great influence on the accuracy of the work, the contact precision of the gears, the precision of the gears and the precision of the gears. It is necessary to reduce the noise of the reducer Know the reason for the noise, the noise of the gear is because during the operation of the machine gear meshing to produce periodic alternating force on the bearing, the role of the box caused by vibration. The main measure of the quality level of a AC Motor Worm Gearbox (referred to as a reducer) is its noise value.