Tapered roller bearing

摘要

A tapered roller bearing device including an inner ring (2) having an inner ring tapered raceway surface and a large rib portion (11) which is located on a larger diameter side of the inner ring tapered raceway surface; an outer ring (1) having an outer ring tapered raceway surface; a plurality of tapered rollers (3) disposed between the inner ring tapered raceway surface and the outer ring tapered raceway surface; and a projecting portion (5) formed on an outer peripheral surface of the large rib portion (11) so as to project in a radial outer direction of the inner ring (2).