When SKF bearing appeared some problems, it will not be able to use. If the SKF bearing produced color phenomenon becaused by too tot surface, then the SKF bearing is not able to use; or when the SKF bearing raceway or the rolling body appreared apparent indentation and cracked traces, the the bearing is not able to use again.Besides the above phenomena that the SKF bearings are not allowed to use, there are also some situations that skf bearing can not be used. For example, the bearing ferrule, block, or retainer and the inner ring and outer ring surface has obvious cracks, the bearing can be used. At the same time when the bearing raceway and the rolling body have rust, it also can not be used.