1. The lubricating oil or grease varieties choose incorrectly;

2. Lubrication insufficient (oil level is too low, oil or grease through the seal leakage);

3. Bearing clearance is too small (with choice not appropriate);

4. Bearing mix sand or carbon particles impurities, abrasive play a role;

5. Bearing mix water, acid or paint etc contamination, promoting corrosion function;

6. Bearing is a hole clamp flat (a hole, or a hole roundness bad distortion is not straight);

7. The underside of the bearing pad iron uneven (leading to a hole deformation even crack of the bearing);

8. There were sundry bearing hole (residues have scraps, a mote etc.);

9. Seal eccentric (met adjacent parts and friction);

10. Bearing take an additional load (bearing axial tight by, or on a shaft have two fixed end bearing);



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