First of all, when inspecting the bearing, it is necessary to judge whether the secondary bearing parts can be used again and record whether the use is good or bad. Also carefully investigate and record the removed bearings and appearance. In order to find out and investigate the remaining amount of lubricant, after sampling, it is necessary to clean the bearing well. Secondly, check the raceway surface of the bearing, the condition of the rolling surface and the mating surface, and the wear state of the cage for any damage and abnormal conditions, especially to observe the running track of the raceway surface.

To judge whether the bearing can be used again, it should be decided after considering the degree of bearing damage, machine performance, importance, operating conditions, inspection cycle, etc. As a result of the inspection, if the bearing is found to be damaged or abnormal, please find out the cause according to the phenomenon of bearing damage and formulate countermeasures. In addition, according to the inspection results, if there are the following defects, the bearing can no longer be used, and a new bearing needs to be replaced.

1. The raceway surface, rib, and rolling elements are significantly damaged.

2. The cage is severely worn or the rivets are loose.

3. The raceway surface and rolling elements are rusted and scratched.

4. There are significant indentations and marks on the rolling surface and rolling body.

5. Any one of the inner and outer rings, rolling elements and cages has cracks and fragments.

6. Any one of the inner and outer rings and rolling elements is peeled off.

7. There is creep on the inner diameter surface of the inner ring or the outer diameter of the outer ring.

8. Overheating and discoloration are severe.

9. The seal ring and dust cover of the grease-sealed bearing are seriously damaged.