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Typical shaft-bearing combinations

SNL and SE 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 and SE 5 and 6 series. Housings, appropriate parts and dimensions are listed in the product tables for bearings on an adapter sleeve and for bearings on a cylindrical seat (fig. 1).
Stepped shaft with bearing on a cylindrical seat

This arrangement is standard for housings in the SNL and SE 2 and 3 series, but can also be used for several housings in the SNL and SE 5 and 6 series. Housings, appropriate parts and dimensions are listed in the product tables for bearings on an adapter sleeve and for bearings on a cylindrical seat.

The bearing is located axially between a shaft shoulder and a spacer sleeve, which is held in place by another component on the shaft (fig. 2). The outside diameter of the sleeve must match the bore diameter of the seal. The spacer sleeve is not supplied by SKF.

Stepped shaft with bearing on an adapter sleeve
When using a SNL or SE 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 a SNL or SE 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 bearings on an adapter sleeve and for bearings on a cylindrical seat) and it should be in accordance with the h9Ⓔ tolerance class to fit the seal. The spacer sleeve is not supplied by SKF.
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