What is the purpose of internal radial and internal axial clearance in the bearing?
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What is the purpose of internal radial and internal axial clearance in the bearing?
There are two reasons why internal clearance in the bearing is necessary.
Reason: -1 Due to interference fit between the bearing outer race and the housing, the outer race tries to shrink a little. Similarly, the interference fit between the shaft and the inner race, the inner race tries to expand a little. To accommodate the shrink and expansion of bearing races, internal clearances in the bearing are necessary.
Reason: -2 During operation due to friction between bearing components, internal clearances are required to accommodate the differential thermal expansion of bearing components.