Check the damaged rolling bearing after disassembly. According to the condition of the damaged bearing, it can be judged that there is a fault and the cause of the damage.

1.The metal peeling off the surface of the raceway

The bearing rolling elements and the inner and outer ring raceway surfaces produce cyclically changing contact stresses due to the cyclic pulsating load, when the number of stress cycles reaches a certain value, fatigue spalling occurs on the working surfaces of the rolling elements or inner and outer ring raceways. If the bearing load is too large, this fatigue will be aggravated. In addition, uneven bearing installation and bending of the spindle will also cause peeling on the raceway surface. Fatigue peeling occurs on the bearing raceway surface, which reduces the running accuracy of the shaft and causes vibration and noise of the machine.

2.Bearing burns

Burnt bearings have tempered colors on raceways and rolling elements. The causes of burns are generally insufficient lubrication, the quality of the lubricating oil does not meet the requirements or deterioration, and the bearing assembly is too tight.

3.Plastic deformation

The uneven pits on the contact surface between the raceway and the roller of the bearing indicate that the bearing is plastically deformed. The reason is that the local stress on the working surface of the bearing exceeds the yield limit of the material under the action of a large static load or impact load. This situation mostly occurs in low-speed rotating bearings.

4.Cracks in the bearing race

The reason for the cracks in the bearing ring may be that the bearing is too tightly fitted, the outer ring or the inner ring is loose moving due to the deformed cage, also for the reason of mounting surface of the bearing is poorly processed.

5.The cage is fractureThe reasons are insufficient lubrication, crushed rolling elements, skewed ferrules, etc.

6.The metal edge of the cage adheres to the rolling elements

The possible reason is that the rolling elements are stuck in the cage or insufficient lubrication.

7.The raceway of a ring is severely worn

It may be that foreign matter has fallen into the ferrule, insufficient lubricating oil, or improper lubricating oil type or brand..

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