To judge whether tapered roller bearings can be used again, it is necessary to consider the degree of damage of tapered roller bearings, machine performance, importance, operating conditions, inspection period and so on. Check the results, if it is found that tapered roller bearings are damaged and abnormal, it is necessary to find out the cause and develop countermeasures. In addition, the inspection results, if there are the following defects, tapered roller bearings can no longer be used, and new tapered roller bearings need to be replaced.

Because tapered roller bearings are not used for a long time, the damage frequency is relatively high, so after a short time, it is necessary to replace once, so as not to cause unnecessary losses, but under what circumstances, tapered roller bearings need to be replaced, and how should we judge whether tapered roller bearings are available? It is mainly decided by considering the damage degree of tapered roller bearings, mechanical properties, importance, operating conditions, and the period of next maintenance.

If the following defects cannot be used, a new tapered roller bearing must be replaced. There are cracks or notches on the inner ring, outer ring, rolling body and cage.

1. Any one of the ferrule and rolling body is broken.

2. There are significant stuck injuries on the surface of the rolling path, the rim and the rolling body.

3. Cage wear is significant or rivet relaxation is significant.

4. There are rust and injury on the raceway surface and rolling body.

5. There are serious indentation and marks on the raceway surface and rolling body.

6. There is obvious creep on inner diameter surface of inner ring or outer diameter surface of outer ring.

7. The discoloration caused by heat is obvious.

8. The damage of sealing ring or dust cover is obvious for tapered roller bearings sealed with grease.