Features of type 1

The outer ring is without ribs and the first and second rows of rollers are guided by a double comb cage, while the third row is guided by a single comb cage.

The rollers are guided axially by rib washers on the inner ring. The back-up rollers are supplied without seals.

Unsealed bearings are preferably lubricated by the rolling emulsion; the lubricant can flow uniformly and without hindrance out of the bearings.

Features of type 2 

These double row back-up rollers have an outer ring with three ribs. The rollers are guided by a brass double comb cage.

These bearings are suitable for all the lubrication methods described on page 7. They are supplied sealed or unsealed in accordance with the lubrication method selected.

Features of type 3

These double row, full complement back-up rollers have a central rib on the inner and outer ring.

The back-up rollers are supplied unsealed and are preferably lubricated by the rolling emulsion.