How to judge whether the bearing can be used again?
Check the disassembled bearings during the regular maintenance of the equipment, the operation inspection and the replacement of peripheral parts, so as to judge whether it can be used again or whether the use is good or bad.
First of all, carefully investigate and record the dismantled bearing and its appearance. In order to clarify and investigate the remaining amount of lubricant, after sampling, the bearing should be cleaned well.
Secondly, check the condition of the raceway surface, rolling surface and mating surface, and the wear state of the cage for damage and abnormalities.
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.
Check the results, if the bearing is found to be damaged or abnormal, find out the cause and formulate countermeasures according to the content of the damage section. In addition, the inspection results, if there are the following defects, the bearing can no longer be used, and a new bearing needs to be replaced.
a. There are cracks and debris in any of the inner and outer rings, rolling elements, and cages.
b. Any one of the inner and outer rings and rolling elements is peeled off.
c. The raceway surface, ribs, and rolling elements are obviously stuck.
d. The cage is severely worn or the rivets are loose.
e. The raceway surface and rolling elements are rusted and scratched.
f. There are obvious indentations and marks on the rolling surface 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.