Typical shaft-bearing combinations

SNL plummer block housings in the 2, 3, 5 and 6 series can accommodate different shaft-bearing combinations:
Plain shaft with bearing on an adapter sleeve
This arrangement is standard for housings in the SNL 5 and 6 series. Housings, appropriate parts and dimensions are listed in the product tables for
Stepped shaft with bearing on an adapter sleeve
When using an SNL plummer block housing for this arrangement (fig. 3), the dimensions of the abutment ring and the spacer sleeve must fit the housing. Abutment rings and spacer sleeves are not supplied by SKF.
Stepped shaft with bearing on a withdrawal sleeve
When using an SNL housing for this arrangement (fig. 4), the withdrawal sleeve must be located axially on the shaft. This can be done using a spacer sleeve that is held in place by another component. Using a lock nut can be difficult because of the limited space in the housing. The outside diameter of the spacer sleeve must be the same as the shaft abutment diameter, db, (→ product tables for
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