Recommended shaft and housing fits
Diameter tolerances for bearing seats
For recommendations for other super-precision bearings, refer to the relevant product section of:
- axial-radial cylindrical roller bearings
- angular contact thrust ball bearings for screw drives
The location of the commonly used tolerance classes relative to the bearing bore and outside diameter surface are shown in (fig. 1).
Selecting bearings to achieve preferred fits
Diameter deviations of the bearings are provided on the package of super-precision angular contact ball bearings.
For extreme conditions, such as very high speeds or heavy loads, contact the SKF application engineering service.
For double direction angular contact thrust ball bearings (BTM and BTW series), the outside diameter of the housing washer is manufactured to tolerances such that sufficient radial clearance in the housing seat is obtained. Therefore, for bearings in the BTW and BTM series mounted adjacent to an appropriate cylindrical roller bearing in the same housing seat, tolerances tighter than those recommended in table 2 should not be used. For additional information, refer to Double direction angular contact thrust ball bearings.