Typical shaft-bearing combinations
SNLN 30 housings can accommodate different shaft-bearing combinations:
Stepped shaft with bearing on a cylindrical seat
Housings, appropriate parts and dimensions are listed in the product table.
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 a withdrawal sleeve
When using an SNLN 30 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 table
) and it should be in accordance with the h9Ⓔ tolerance class to fit the seal. The spacer sleeve is not supplied by SKF.