Rolling bearing and rolling bearing assembly

摘要

There is provided a rolling bearing (1) including an inner ring (2) having an inner ring raceway surface, an outer ring (3) having an outer ring raceway surface and a shoulder portion (3b) formed on one axial side of the outer ring raceway surface, a plurality of rolling elements (4) which roll between the inner ring raceway surface and the outer ring raceway surface, and a cage (5) adapted to hold the plurality of rolling elements at predetermined intervals in a circumferential direction and having a guided surface which confronts the shoulder portion of the outer ring in such a manner as to be brought into sliding contact therewith. The rotation of the cage is guided through sliding contact of the guided surface of the cage with a guiding surface of the shoulder portion of the outer ring. A guiding space (S1) which is a radial space between the guiding surface of the shoulder portion of the outer ring and the guided surface of the cage is made to increase as approaching the rolling elements