The SKF Bearings mating role is such that the stationary bearing ring and the rotating ring and the stationary part of the installation site (usually the bearing housing) and the rotating section (typically axis) consolidation together to transfer loads and limited in order to achieve in the rotational state the movement of the system with respect to the basic tasks of the position of the stationary system.
In the shaft and bearing, the rolling bearing requires to fix its position in three directions, such as radial, axial and tangential direction. The positioning of the radial and tangential by NSK bearings rings tight with the mining realize, the axial positioning only in a few cases were a tight fit; commonly used the axial spacing parts, such as end caps and ring axial position limited in the range of clearance.
Choice of tie should be to focus on the following four points:
 (1) bearing ring circumference surface should have a good support, even by force, in order to minimize distortion and can give full play to the carrying capacity of the FAG bearings.
 (2) the ferrule in its complex surface can not be slid along the tangential direction, otherwise it will damage the mating surfaces.
 (3) The free end bearing must be capable of the change in length of the shaft and the bearing hole adapted, i.e. must have the ability to adapt the axial position within a certain range swimming.
(4) must pay attention to the the TIMKEN bearings installation and removal easy, saving time and labor expenditure.
The INA Bearings fever Remedy
 (1) Cause: bearing accuracy
Methods: specified levels of precision bearings.
 (2) the reasons: different spindle bent or cabinet hole heart
Methods: fix the spindle or the box.
 (3) The reason: the belt tight
Method: adjust the the belt tightness appropriate.
 (4) The reason: poor lubrication
Methods: provisions grades of lubricating material and properly cleaned.
 (5) The reason: low quality of assembly
Methods: improve the quality of assembly.
 (6) Reason: the bearing housing lap
Methods: replace the bearings and wear parts.
 (7) the axial force is too large
Methods: cleaning, align the seal ring clearance requirements between 0.2 ~ 0.3mm, static balance correct impeller balance hole diameter and the checksum value.
 (8) bearing damage
Method: replace the bearings.


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