Design of bearing arrangements

Shaft and housing fits

Shaft and housing fits can have a significant influence on the internal clearance and the operating characteristics of polymer deep groove ball bearings. Therefore, SKF recommends approximately 20 μm interference fit for one ring only. Depending on the application, the interference fit can be on the shaft or in the housing. The other ring should have a loose fit.
Never subject both bearing rings to an interference fit as it preloads the bearing, causing it to fail prematurely.
These recommendations are only guidelines to calculate a fit. Thermal expansion of the bearing components under operating conditions must be taken into consideration.
For additional information, contact the SKF application engineering service.
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