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Typical shaft-bearing combinations

SONL plummer (pillow) block housings can accommodate different shaft-bearing combinations:
Plain shaft with bearing on an adapter sleeve
For this arrangement (fig. 1), housings, appropriate parts and dimensions are listed in the product table.
Stepped shaft with bearing on a cylindrical seat

For this arrangement (fig. 2), housings, appropriate parts and dimensions are listed in the product table.

The bearing is located axially by an inboard labyrinth seal shaft sleeve that abuts the shaft shoulder, and an outboard labyrinth seal shaft sleeve that is held in place by another component (not supplied by SKF). The outside diameter of this component must be at least as large as that of the sleeve.

Plain shaft with bearing on a cylindrical seat
When using an SONL housing for this arrangement (fig. 3), a /VZ643 seal kit must be used. The bearing and labyrinth seal shaft sleeves must be located axially on both sides by other components (not supplied by SKF) on the shaft.
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