1. failure of grease or oil, model selection not asking oil traders decided the correct form of lubricant
　　2. low oil level or a lack of grease: lubricating oils will have a scroll bar below the bottom of the centres, housing about filling grease in one-third per cent of space
　　3. bearing internal clearance is not appropriate as an axis heat heat expansion: selection of suitable internal clearance of bearings, such as the change from standard grade C3 or C3 to C4
　　4. lubricants are stolen goods, grains, foreign body contamination such as toner: clean bearing box, replacing the new or improved oil seal oil seal, fresh lubricant
　　5. water, acids, paints or other corrosive substances into the bearing box: install protective moisture-proof covers or dump dust ring
　　6. distorted or inner hole of shaft child did not circle, too small: measurement of bearing hole and turning inside the box, non-locating bearing changed from Erica cylindrical bearings deep groove ball bearings could lead to tight box holes or small
　　7. put the bearing front bearing housing does not clean: clean bearing box and adding fresh lubricant
　　8. airflow causes oil spills such as the air flows through the fan bearings bearings: install shield flow towards and, if possible, use grease
　　9. bearing passive location: join between the bearing box and lid flange gasket on the release bearing preload
　　10. a has two locating bearing on the shaft, excessive axial expansion result in insufficient bearing internal clearance: end cap out of any housing, and insert the gaskets to adjust the axial clearance of the bearing outer ring, bearing free axial movement
　　11. the journal is too small or neck sleeve locking is not enough: spray journal surfaces again and grind to the specified dimensions or locking sleeve
　　12. the adapter sleeve locking: loosen fixing screw and sleeve, lock again to enough force, but must ensure that bearings can freely rotate
　　13. loss of separated oil from the bearing box surfaces: use thin layers of seal coating will help prevent oil spills do not use adjustment gasket and, if necessary, replace the bearing box
　　14. the machine does not balance the load is too large, or bearing hole is too big: re-balancing machine, or replace the exact diameter of bearing box
　　15. the bearing due to deformation of shaft and bearing bore on the unequal distribution of composite: rework the hole of shaft and housing to get the proper shape and tie. But usually requires replacement of the shaft or bearing box
　　16. caused by improper axis support axis of bends: rework the chamfer of the shaft to eliminate stress, you may need to add shoulder clasp
　　17. the lack of child support within the bearing in the bearing box, leading outer ring distortion: chamfer machining bearing box again to eliminate stress, you may need to add shoulder clasp
　　18. the shaft and bearing seal friction: rework the shaft to eliminate friction
　　19. the bearing seal deformation: machining bearing box empty again shoulder to avoid the bearing seal cover
　　20. shaft and inner ring deformation, and uneven bearing inner ring expansion: chamfer processing axis again to receive appropriate support
　　21. child bearing and deformation of the outer ring, bearing be squeezed: machining bearing box chamfer again to receive appropriate support
　　22. the rotating oil seals or dust throwing ring friction and static parts: check the rotating oil seals or dust ring throwing far-go gap to avoid friction, prevent wrong heart
　　23. oil level is not correct, no lubricant in bearings: cleared gas-obstruction of the hole in the oil level gauge, oil level correct
　　24. different bearings and shaft, or shaft and different hearts: by adjusting shim adjustment of bearing on, or improved between the axis and the axis of the precision
　　25. the constant oil level glass installed too high or too low, or installed on a bearing towards the opposite position: stationary oil level no higher than the bottom rolling element Centre, or constant oil level glass installed in line with the direction of rotation of the bearing the exact location
　　26. the other moving parts of the machine and static parts rub: check between the static and dynamic parts clearance
　　27. bearing installation is not correct, hammer bearing: bearing replacement, standard shaft-mounted
　　28. the excessive contact bearings type oil seal wear causing loss of lubricant, dirt: change the oil seals, bearing box of clean and fresh again grease
　　29. the hole of shaft shoulder or shoulder or lock nuts are not perpendicular to the bearing: rework parts in order to obtain good squareness
　　30. the axle journal size is too large causing the bearing internal clearance is too small: abrasive shaft journal shaft and obtain appropriate
　　31. bearing box after Comte material too soft forces lead to slip in the box holes in the outer ring of the bearing: expand the box hole and add a notice, then processed copper village set to the correct size



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