How to choose bearing with right clearance?
PRODUCT
NSK bearings correct installation and adjustment of low noise method
by：Waxing
2020-09-24
1 NSK bearings, low noise, the installation and adjustment of also can imitate grouping method of long life bearings, makes the interference fit the size is consistent, NSK bearing clearance is relatively consistent, and hope to cooperate with interference within may take smaller values, to ensure the deformation of NSK bearing raceway is small, and rolling body caused by noise is smaller.
2, clearance on the relationship between the noise is very large, ideally when NSK bearings in the running state of the highest temperature, clearance value is zero.
Judgment methods of clearance is too large, stationary state make bearing axial displacement, the extent of the reciprocating is bigger, the big and heavy turbidity of a noise during operation.
3, if the hate sharp whistlers, NSK bearing preload is too big, then preloaded, bearing a large prestressing degree should have to relax.
If the clearance is too large, can make the two bearing ring along the axial relative offset slightly: both reduced clearance, and increase the axial rigidity, NSK bearings can reduce the noise.
4, rolling body around would not bite into the no-load area or channeling, that will not only increase the noise can also cause wear and tear, and the small clearance and large axial stiffness can eliminate the phenomenon.
But cannot too small clearance, lest cause high temperature and shorten the life.
5, sometimes because of the host operating temperature range is very large, or the size of the shaft and the bearing hole discreteness is very big, can't get a setting on a proper clearance, in this case, NSK bearings on the outer ring of the elastic constant pressure preload method.
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