Inspect the bearings that have been disassembled during regular maintenance of the equipment, operation inspection and replacement of peripheral parts to determine whether they can be used again or whether the condition of use is better than bad. The removed bearings and their appearance should be carefully investigated and recorded. In order to clarify and investigate the remaining amount of lubricant, the bearings should be cleaned well after sampling.
Secondly, check the condition of the raceway surface, rolling surface and mating surface, as well as the wear status of the cage, etc. for damage and abnormalities.
To determine whether a bearing can be used again, the decision must be made after considering the degree of bearing damage, machine performance, importance, operating conditions, inspection intervals, etc. According to the inspection results, if the bearing is found to be damaged or abnormal, the damage section will identify the cause and formulate countermeasures. In addition, according to the inspection results, if there are any of the following defects, the bearing can no longer be used and needs to be replaced with a new one.
- a. There are cracks and fragments in any of the inner and outer rings, rolling elements, and cages.
- b. Any of the inner and outer rings or rolling elements is peeled off.
- c. The raceway surface, ribs, and rolling elements are obviously jammed.
- d. The cage is severely worn or the rivets are loose.
- e. The raceway surface and rolling elements are rusty and scratched.
- f. There are obvious indentations and scratches on the rolling surfaces and rolling elements.
- g. There is creep on the inner diameter surface of the inner ring or the outer diameter of the outer ring.
- h. Severe discoloration due to overheating.
- i. The sealing ring and dust cover of the grease-sealed bearing are seriously damaged.
