Tapered roller bearing, tapered roller bearing apparatus, and automotive pinion shaft support system with such bearing apparatus

摘要

A tapered roller bearing includes an outer ring (20), an inner ring (10), a plurality of tapered rollers (30) interposed between the outer ring (20) and the inner ring (10), and a cage (40) for the tapered rollers (30). Ra is smaller than Rb where Ra represents a radius of curvature of a large end face of the tapered roller (30) and Rb represents a radius of curvature of an end face of a large rib portion of the inner ring (10).