SKF spherical roller thrust bearings are separable, making it possible to mount the housing washer separately from the shaft washer, cage and roller assembly.
When a spherical roller thrust bearing with a machined cage (fig. 1) is to be replaced by an E design bearing with a stamped window-type steel cage, and axial forces are transmitted via the cage guiding sleeve, a spacer ring must be inserted between the shaft abutment and the shaft washer (fig. 2).
If an earlier B design SKF bearing, mounted with a spacer ring (fig. 3), is to be replaced, the spacer ring generally needs to be modified (fig. 4). The diameter db2 (→ product table) of the spacer ring needs to be reduced for almost all bearing sizes.
The spacer ring must be hardened and its side faces should be ground. Appropriate spacer ring dimensions for SKF spherical roller thrust bearings are listed in the product table.