27 reasons why the bearing is ringing

After a long-term summary by the technicians, there are 27 reasons for the bearing to sound. There may be many that we have not encountered before, and will be slowly replenished later.

1. The bearing is mixed with impurities such as sand or carbon particles to act as an abrasive.

2. The bearing is mixed with moisture, acid or paint and other dirt, which acts as a corrosive effect;

3. The clearance of the bearing is too small (the selection is not appropriate);

4. The lubricating oil or grease type is incorrectly selected;

5. Insufficient lubrication (oil level is too low, oil or grease leaks through the seal);

6. The bearing is flattened by the seat hole (the roundness of the seat hole is not good, or the seat hole is not twisted straight);

7. The horn of the bottom of the bearing housing is not flat (resulting in deformation of the seat hole or even cracks in the bearing housing);

8. There are debris in the bearing housing hole (residues, dust particles, etc.);

9. The seal is eccentric (wearing adjacent parts and rubbing);

10. The bearing is subjected to additional loads (the bearing is axially tightened, or there are two fixed end bearings on one shaft);

11. The thermal elongation of the shaft is too large (the bearing is subjected to static and indeterminate axial additional load);

12. The clearance of the bearing is too small, and the rotation is too tight (the tightening sleeve is tightened);

13. The bearing is noisy (caused by the end face of the roller or the slip of the steel ball);

14. The bearing and the shaft are too loose (the diameter of the shaft is too small or the adapter sleeve is not tightened);

15. The shoulder is too large (touching the seal of the bearing and rubbing);

16. The shoulder of the seat hole is too large (the seal of the bearing is twisted);

17. The gap of the labyrinth seal is too small (friction with the shaft);

18. The teeth of the lock washer are bent (wearing the bearing and rubbing);

19. The position of the oil ring is not suitable (the flange cover is encountered and friction occurs);

20. There is a pressure pit on the steel ball or roller (caused by hammering the bearing during installation);

21. The bearing is noisy (with external source interference);

22. The bearing is discolored and deformed by heat (caused by the use of a spray gun to disassemble the bearing);

23. The shaft is too thick to make the actual fit too tight (causing the bearing temperature to be too high or noise);

24. The bearing is noisy (the bearing has fretting abrasion).

25. The bearing housing hole diameter is too large, the actual fit is too loose (the bearing temperature is too high - the outer ring slips);

26. The bearing housing hole becomes larger (the bearing hole of the non-ferrous metal is enlarged, or becomes larger due to thermal expansion);

27. The diameter of the seat hole is too small (causing the bearing temperature to be too high).