Date: 2013-08-06

Application of Bearings (2)

Preload is the relationship of the bearing bore to the shaft diameter and bearing clearance. The formula for preload calculation is:

Preload in other words is the load generated from the axial interference within a bearing resulting in elastic deformation between rolling elements and the raceway. It is the axial load applied permanently to bearings to ensure proper operation under external load.



Rigid preload involves a gap between the faces of opposite bearings that is eliminated when bearings are locked axially. It may change due to thermal expansion.



Elastic preload, expansion is compensated for by the springs. Bearing preload variation is minimal in this case. Bearing preload influences speed limits, rigidity and other applicable workloads.
 

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