Causes Of Grease Discoloration Caused By Bearing Clearance
Causes Of Grease Discoloration Caused By Bearing Clearance
2022年1月17日
Skillfully Select The Lubricating Materials And Methods Of Sliding Bearings
Skillfully Select The Lubricating Materials And Methods Of Sliding Bearings
2022年1月17日

Causes And Solutions Of Frequent Bearing Replacement

Bearing Replacement

Fag bearing ina bearing NSK bearing NTN bearing

1. Failure of lubricating grease or Bearing Replacement engine oil, wrong model selection

Ask the oil supplier to determine Bearing Replacement the correct form of lubricant

2. Low oil level or insufficient grease

The lubricating oil must be lower than the center of the lower rolling element, and the lubricating grease in the Bearing Replacement bearing box fills about 1 / 3 to 1 / 2 of the space

3. Improper internal clearance of Bearing Replacement bearing, such as thermal expansion of shaft when heated

Select the bearing with appropriate internal clearance, such as changing Bearing Replacement from standard grade to C3 or C3 to C4

4. Lubricant is affected by dirt and Bearing Replacement sand. Foreign matter pollution such as toner

Clean the bearing housing, replace with a new oil seal or improved oil Bearing Replacement seal, and inject fresh lubricant

5. The bearing housing is distorted or the inner hole is out of round Bearing Replacement and too small

Measure the hole size in the bearing box and turn it. Changing the non fixed end bearing from cylindrical bearing to deep groove ball bearing may lead to tight or small hole in the box

6. Water, acid, paint or other corrosive substances enter the bearing housing

Install protective damp proof cover or dust ring

7. The bearing housing was not cleaned before the bearing was assembled

Clean the bearing housing and add fresh lubricant

8. Air flow through the bearing causes oil leakage, such as the air flow of the fan through the bearing

Install the wind deflector to divert the air flow, and use grease if possible

9. Bearing cross positioning

Add a gasket between the bearing box and the box cover flange to release the preload on the bearing

10. There are two positioning bearings on one bearing. Excessive axial expansion leads to insufficient internal clearance of the bearing

Move the end cover of any bearing housing outward, and use the insert gasket to adjust the axial clearance of the bearing outer ring, so that the bearing can move freely in the axial direction

Causes And Solutions Of Frequent Bearing Replacement

11. The shaft diameter is too small or the stiffening sleeve is not locked enough

Spray the shaft diameter surface and grind it to the specified size or re lock the sleeve

12. The locking sleeve is over locked

Loosen the set screw and sleeve and re lock to sufficient tightening force, but ensure that the bearing can rotate freely

13. Excessive oil loss from bearing housing partition

Using a thin layer of sealing paint will help to prevent oil leakage. Do not use adjusting shims. Replace the bearing housing if necessary

14. The unbalanced load of the machine is too large or the bearing hole is too large

Rebalance the machine or replace the accurate bore bearing housing

15. The load distribution on the bearing is uneven due to the deformation of the shaft and bearing hole box

Reprocess the shaft and bearing housing bore to obtain the proper shape and fit, but it is usually necessary to replace the shaft or bearing housing with a new one

16. Improper abutment support causes bending of the shaft

Re machining the chamfer of the shaft to relieve stress may require adding a shoulder snap ring

17. The bearing is not supported enough in the bearing housing, resulting in the distortion of the outer ring

Reworking the chamfering of the bearing housing to relieve stress may require adding a shoulder snap ring

18. Friction between shaft shoulder and bearing seal

Rework the shoulder to eliminate friction

19. Deformation of bearing seal

Rework the shoulder of the bearing housing bore to avoid the bearing seal cover

20. Deformation of shaft and inner ring, uneven expansion of bearing inner ring

Re machine the shaft chamfer for proper support

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