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Design of bearing arrangements

Abutment dimensions

The cage of needle roller bearings without flanges should be guided axially by the fine turned and polished surfaces of adjacent machine components. Appropriate abutment diameters are listed in the product tables.

Shaft and housing tolerances

The tolerances of raceways on shafts for machined needle roller bearings without an inner ring significantly influence the operating clearance of the bearing and, therefore, are provided under Operating clearance.
For additional information about raceways, refer to Raceways on shafts and in housings.
Table 1 provides suitable tolerance classes for the shaft for needle roller bearings with machined inner and outer rings.
The recommended housing fits for needle roller bearings with machined inner and outer rings are provided in table 2.
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