Where a spherical roller thrust bearing with a machined metal cage (fig. 1) is to be replaced by an E design bearing with a stamped steel window-type 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).
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.