Basic design bearings
Depending on their series and size, SKF spherical roller thrust bearings are manufactured to two basic designs: bearings with no designation suffix and E design bearings.
Bearings with no designation suffix (e.g. 29272) are fitted with a machined prong-type brass cage as standard (fig. 1). The cage is guided by a sleeve held in the shaft washer bore. The shaft washer, cage and rollers form a non-separable unit.
Bearings with an E designation suffix have larger rollers and an optimized internal design for increased load carrying capacity. E design bearings up to size 68 are fitted with a stamped window-type steel cage (fig. 2), which forms a non-separable unit with the shaft washer and rollers.
E design bearings from size 72 and larger are fitted with a machined prong-type cage. This type of cage is guided by a sleeve held in the shaft washer bore. The shaft washer, cage and rollers form a non-separable unit.