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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
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7214A5TYNDBLP4 NSK | 70 | 125 | 24 |
| 7214CTYNDBLP4 NSK | 70 | 125 | 24 |