What causes bearing noise?---ZBFshares

- May 30, 2020-


ZBF shares the cause of bearing noise:

1. Grease has impurities;

2. Insufficient lubrication (oil level is too low, improper storage leads to oil or grease leakage through the seal);

3. The clearance of the bearing is too small or too large (problem in the manufacturer);

4. Impurities such as sand or carbon particles are mixed into the bearing to act as an abrasive;

5. The bearing is mixed with water, acid or paint and other contaminants, which play a corrosive role;

6. The bearing is flattened by the seat hole (the seat hole is not well rounded, or the seat hole is twisted or not straight);

7. The horn on the bottom surface of the bearing seat is uneven (causing deformation of the seat hole or even cracks in the bearing seat);

8. There is debris in the bearing seat hole (remains of cuttings, dust particles, etc.);

9. The seal ring is eccentric (touching adjacent parts and causing friction);

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

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

12. The clearance of the bearing is too small, and it is too tight when rotating (the adapter sleeve is too tight);

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

14. The thermal elongation of the shaft is too large (the bearing is subjected to static and axially additional loads);

15. The shaft shoulder is too large (touching the bearing seals and causing friction);

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

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

18. The teeth of the lock washer are bent (touch the bearing and friction occurs);

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

20. There are pressure pits on the steel ball or roller (caused by hitting the bearing with a hammer during installation);

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

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

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

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

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

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

27. The cage is broken;

28. Rust of bearing raceway;

29. Wear of steel balls and raceways (unqualified grinding or scratched products);

30. The ferrule raceway is not qualified (problem of the manufacturer)


ZFB is a professional Low noise bearing manufacturer,any help please contact us directly.