The basic indexing rollers of SKF are two-row cageless cylindrical roller bearings. In certain cases they are based on four-row cageless cylindrical roller bearings. The thick-walled external ring of the bearing has three boards. The durable cylindrical external surface of an external ring of a zakruglyon to end faces or has transition to end faces in the form of a facet. The internal ring consists of two parts, each of which has a board that allows the bearing to perceive heavy axial loadings in addition to radial. The au-shaped rings inserted into flutes on boards of an internal ring prevent hit of dirt in a cavity of the bearing and an effluence of plastic greasing from it. Rings also do the bearing non-demountable.
The basic indexing rollers are initially developed for furnaces of continuous action aglofabrik and granulyatsionny plants. These knots, ready to installation, are also suitable for application where it is necessary to perceive heavy loadings where the direction of rotation, and also in the conditions of small frequencies of rotation often changes.