Patent ID: 11542982

Abstract:
A tapered roller bearing includes an inner ring having a tapered raceway surface and a large-collar surface on a large-diameter side of the raceway surface, and tapered rollers. Each of the rollers has a large end surface guided by the large-collar surface. When R represents a set curvature radius of the large end surface and RBASE represents a base curvature radius from a vertex of a cone angle of each of the tapered rollers to the large-collar surface, the base curvature radius RBASE is 100 mm or less, and a ratio R/RBASE of the set curvature radius R to the base curvature radius RBASE is set to 0.90 or less. When RACTUAL represents an actual curvature radius of the large end surface of each of the tapered rollers, a ratio RACTUAL/R of the actual curvature radius RACTUAL to the set curvature radius R exceeds 0.5.