Importance of selecting correct clearance/preload

Performance and operating conditionsBearing type and arrangementBearing sizeLubricationOperating temperature and speedBearing interfacesBearing executionSealing, mounting and dismounting

The operating clearance or preload in a bearing influences, among other things, the friction, load zone size and fatigue life of a bearing. Diagram 1 shows the relationship between these parameters. The diagram is generalized and based on rolling bearings under radial load.
For general applications, the operating clearance range should be within the recommended zone shown in diagram 1.
Selecting initial internal clearance and Selecting preload describe the influencing factors that must be considered and provide the methods by which you can calculate the initial internal clearance needed to achieve the degree of clearance/preload required by your application.
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