SEED Guides Rolling element bearings Factors < >

2.3 Bearing quality and accessibility
The type of machine (precision, general purpose, aerospace, etc.) in which the bearing is to be fitted will affect the quality of the bearing chosen and the ease with which the bearing can be fitted, inspected, maintained, removed or replaced.

The space available for the bearing may determine the bearing type and will limit the performance for a given type. Machine dimensions may have tolerances which affect bearing installation. Potential misalignment of machine elements will gravely limit the life of most bearings. However some types are designed to absorb small amounts of misalignment.

Bearing dimensions are normally given in manufacturers' catalogues together with recommendations on fits between inner ring/shaft and outer ring/ housing.

For a given bearing type, a single housing diameter will be suitable for a range of shaft sizes, each bearing having given dimensions and load rating. Similarly for a given shaft diameter a range of housing diameters will give different dimensions and capacities. The recommended fit between machine parts and bearing rings will depend on which ring is rotating, on the material of the machine parts and on the nature of the loading.