Harbin bearing little numbered summary 30 bearing ring causes:
1. bearings in mixed with water, acid or paint, dirt, corrosion;
2. the bearing hole clip flat (bore roundness is poor, or bore distortion of straight);
3. the Horn of the underside of the housing injustice (lead to deformation or cracks on housings);
4. debris in the bore of the bearing (residual chips, dust, etc);
5. oil impurities;
6. lack of lubrication (oil level is too low, save the improper oil or grease leakage by sealing);
7. bearing internal clearance is too small or too large (factory);
8. mixed with sand or carbon particles and other impurities in the bearings, an abrasive role;
9. seal eccentricity (run into adjacent parts and friction);
10. additional bearing loads (axial of the bearing stand tight, or two locating bearing on the shaft);
11. the bearing and shaft fit too loose (the smaller diameter of the shaft or sleeves are not tight);
12. bearing internal clearance is too small, rotating too tight (adapter sleeve tighten too far);
13. the bearings have noise (caused by skidding of the end roller or ball);
14. the thermal elongation of the shaft is too large (indeterminate axial bearing load);
15. the shoulder is too large (encounter seals bearings and friction);
16. seat the abutment is too big of a hole (touch distort bearing seals);
17. the labyrinth sealing ring gap is too small (with the shaft friction);
18. bend tooth lock washers (met bearings and friction);
19. oil ring location is inappropriate (encounter friction cover and flange);
20. the pit on the ball or roller (installed with a hammer when the bearing caused by);
21. the bearings have noise (external vibration interference);
22. heat discoloration and deformation of the bearing (use gun to heat caused by disassembling bearing);
23. the shaft too large so that the actual suit too tight (bearing temperature or noise);
24. small hole diameter (bearing temperature is too high);
25. the bearing bore diameter is too large, practical cooperation is too loose (temperature is too high-the outer ring of bearings slipping);
26. the bearing bore larger (non-ferrous metal bearing block hole is stretched, or larger due to thermal expansion);
27. the cage fracture.
28. bearing Raceway rust.
29. the steel ball, roller wear (grinding of sub-standard products have hurt).
30. the unqualified Raceway (production plant).
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