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Several common damage to rolling bearings 

wallpapers News 2020-12-09
When the bearing is disassembled and inspected, the fault and the cause of the bearing can be judged according to the damage of the bearing.
  
1. Metal peeling off the surface of the raceway
  
The rolling elements of the bearing and the inner and outer ring raceways are all subjected to periodic pulsating loads, resulting in periodic contact stress. 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 increase. In addition, if the bearing is installed incorrectly and the shaft is bent, the raceway will peel off.
  
The fatigue peeling of the bearing raceway will reduce the running accuracy of the shaft and cause vibration and noise in the mechanism.
  
2. Bearing burn
  
The burnt bearing has a tempered color on the 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
  
There are uneven dents on the contact surface between the raceway and the roller of the bearing, indicating 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 generally occurs in a bearing that rotates at a low speed.
  
4. Cracks in the bearing race
  
The cause of the cracks in the bearing race may be that the bearing is too tightly fitted, the bearing foreign or inner ring is loose, the bearing housing is deformed, and the surface where the bearing is installed is poorly processed.
  
5. The cage is broken
  
The reasons are insufficient lubrication, broken rolling elements, skewed races, etc.
  
6. The metal of the cage adheres to the rolling elements
  
The possible cause is that the rolling elements are stuck in the cage or insufficient lubrication.
  
7. The raceway of the seat ring is severely worn
  
It may be that foreign matter has fallen into the seat ring, the lubricant is insufficient or the lubricant brand is not suitable.

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