1. incorrect selection of lubricant or grease species. 2. insufficient lubrication (oil level too low, oil or grease leaking through seals) 3. the clearance of the bearing is too small (the fit is not properly selected) 4. impurities such as sand or carbon particles are mixed into the bearing and act as abrasive 5. the bearings are mixed with water, acid or paint and other dirt, which play a corrosive role. 6. the bearing is flattened by the seat hole (the roundness of the seat hole is not good, or the seat hole is not straight) 7. the bearing seat of the bottom of the pad iron is not flat (resulting in seat hole deformation or even bearing seat cracks). 8. bearing seat hole with debris (residual chips, dust particles, etc.) 9. Seal ring eccentricity (touching adjacent parts and friction occurs) 10. the bearing is subjected to additional load (the bearing is subjected to axial lameness, or there are two fixed end bearings on a shaft) 11. the fit of the bearing to the shaft is too loose (the diameter of the shaft is small or the tightening sleeve is not tightened) 12. the clearance of the bearing is too small and too tight when rotating (the tightening sleeve is over-tightened) 13. the bearing is noisy (caused by the end face of the roller or the slipping of the steel ball) 14. shaft thermal elongation is too large (bearing by static uncertain axial additional load); 15. Shaft shoulder is too large (touching the seal of the bearing and friction occurs); 16. the shoulder of the seat hole is too large (the bearing hair of the seal touches distorted); 17. Labyrinth seal gap is too small (and shaft friction); 18. The teeth of the locking washer are bent (touching the bearing and rubbing); 19. The position of the oil dump ring is not suitable (touching the flange cover and friction); 20. Steel balls or rollers with pressure pits (caused by hammering the bearing during installation); 21. Bearing noise (interference from external vibration source); 22. Heat discoloration and deformation of the bearing (caused by dismantling the bearing by heating with a gun); 23. The shaft is too thick so that the actual fit is too tight (resulting in high bearing temperature or noise); 24. The diameter of the seat bore is too small (resulting in high bearing temperature); 25. Bearing seat hole diameter is too large, the actual fit is too loose (bearing temperature is too high – outer ring slippage); 26. Bearing seat hole becomes large (non-ferrous metal bearing seat hole is propped up, or due to thermal expansion and become larger); 27. The bearing has noise (the bearing has micro-abrasion).

We have rich experience on precision bearing manufacturing and are ranked NO.1 in China and NO.3 all over the world.

We can tailor the overall solution for the use of precision bearings.

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