How to judge whether the deep groove ball bearing is faulty

How to judge whether the deep groove ball bearing is faulty?
Inspection of deep groove ball bearing during operation. During the operation of deep groove ball bearing, you should carefully listen for any abnormal noise in the double row angular contact ball bearing. During the inspection, you can put the head of a screwdriver against the outside of the bearing end cover, and put the handle next to your ear. If you hear the sound of "gurgle" or "gurgle", it means that the deep groove ball bearing is faulty. If you cannot determine whether the deep groove ball bearing has failed, you can remove the load of the deep groove ball bearing, turn on the power to run, listen to the sound at the bearing, and then turn off the power. If the noise disappears, it is not a deep groove ball bearing failure. If the noise still exists, it can be determined that the bearing is faulty. Inspection of bearing heating. There are many reasons for bearing heating, and the heating of deep groove ball bearings will also be transmitted to the bearing parts, and the heating of bearings will also be transmitted to the housing.
Therefore, it is not possible to simply determine whether the bearing is heating. Check the state of the raceway surface, rolling surface, mating surface, wear of the cage, increase in clearance of the double row angular contact ball bearing, and abnormal damage that is not related to the reduction of dimensional accuracy. For non-separable small ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to confirm whether it is smooth. Large bearings cannot be rotated by hand, so pay attention to check the appearance of rolling elements, raceway surfaces, cages, flange surfaces, etc. The more important the deep groove ball bearing is, the more careful the inspection should be. When we use bearings, we must regularly maintain and inspect the bearings, which can not only maintain the performance of the bearings, but also extend the life of the bearings.