Bearing as an important part of the operation of mechanical equipment, when we find that the bearing in the process of operation, the shaft of the bearing always feels not moving, that is, the so-called bearing shaft operation is difficult?What's going on here?

Why is it very difficult for the bearing axis to rotate? 

In general, the main reasons have the following aspects, which can be considered from these aspects, and find the corresponding methods for a good solution.

1, lubrication failure, the oil level is too high or too low, improper selection of bearing clearance.

2, the degree of cleaning is not in place, there may be debris.

3. Oil seal, shaft shoulder and seal, anti-loose piece (sun piece), and other positions are not appropriate.

4. The concentricity of the shaft is not correct, and cross-positioning causes axial jamming.

5. Bearing box has low accuracy and distortion.