Under the same working conditions, the actual life of bearings with the same appearance is quite different. Some bearings can be used for a long time, while some bearings need to be replaced at intervals. So, how to judge whether the bearing can be used again?

1. In order to judge whether the disassembled bearing can be used again, it is necessary to focus on checking its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and sealing ring, etc.

2. If there are any of the following defects, the bearing can no longer be used and needs to be replaced with a new one.

   ① There are cracks and debris in any of the inner and outer rings, rolling elements, and cages.
   

   ② Any one of the inner and outer rings and rolling elements is peeled off.
   

   ③ The raceway surface, ribs, and rolling elements are obviously stuck.
   

   ④ The cage is severely worn or the rivets are loose.

   ⑤ Rusty and scarred raceway surfaces and rolling elements.

   ⑥ There are obvious indentations and marks on the rolling surface and rolling elements.

   ⑦Severe discoloration due to overheating.

   ⑧The sealing ring and dust cover of the grease-sealed bearing are seriously damaged.