1. Poor lubrication (accounting for about 35%) Fault manifestations:Scratches, discoloration (blue), and abnormal wear on the rolling element or raceway surface.High temperature (>80℃) or increased noise.Cause breakdown:

1. Insufficient or improper lubrication:The quality, type and amount of lubricant added have a direct impact on the bearing cage. Improper lubrication can cause excessive friction inside the bearing, aggravate the wear of the cage and eventually lead to damage. Common lubrication problems include insufficient lubricant, excessive lubricant or the use of unsuitable lubricants.

Lubrication inspection of motor bearings is an important step to ensure the normal operation of the motor and extend the life of the bearings. The following are the steps to check the lubrication of motor bearings: