If abnormal hot, mechanical vibration and sudden loud noise are found in the operation of the overturned bearing, it indicates that the overturned bearing may have been destroyed, and it is necessary to check and find out the cause in time. The most common ways of destruction are:

1, tired off

On the raceway or rolling surface of the overturned bearing, the metal material on the surface of the contact area is massive and falls off, and gradually expands, resulting in pits. If run again, the resulting total area falls off. Due to the unreasonable installation and use or the skew of the bearing seat hole and shaft axis and other factors, some parts of the bearing will bear relatively large loads and the initial fatigue failure will occur.

2. Cracks and ruptures

Raw material shortcomings and thermal negligence, mutual interference is large, the combination design is unreasonable, such as the support surface of the pipe and caused by stress, will produce ring cracks and cracks.

3, imprint

When external durum chemicals enter the bearing and press between the rolling body and the raceway, the overturning surface can be imprinted. In addition, excessive load can also cause partial plastic deformation of the touching surface and produce pits. When the bearing is stationary, even if the load is not large, taking into account the vibration of the surrounding environment will produce evenly distributed pits on the raceway.

4. Damage

When the sealing of the overturned bearing is not very good, so that dust or particle chemicals enter the bearing, or the wetting is poor, it will cause serious scratch or damage to the touching surface, so as to increase the oscillation and noise of the bearing.

5. Current erosion

According to the bearing, the electrical flow will bring a little spark discharge, resulting in the partial quenching of the contact surface and the occurrence of pits or gray black flash. In more severe cases, large pits will appear.

6. Rust

Unreasonable use of water, acid, alkali, salt and other substances into bearings or lubricating fluid will lead to bearing rust, and even mild rust of high-precision bearings will lead to bearing damage.

7. The cage is damaged

Overturning bearing, especially fast bearing, because of lack of lubrication fluid, damage, impact, and even rupture of the cage at the contact between the cage and the rolling body or the throwing ring.