Patent ID: 7175351

Claim:
A tapered roller bearing comprising: an outer race; an inner race; a plurality of tapered rollers interposed between the outer race and the inner race; and a cage that retains the tapered rollers; wherein the inner race includes a tapered raceway in which the tapered rollers are disposed and a small-diameter end portion and a large-diameter end portion which are formed at opposite ends of the raceway, wherein the small-diameter end portion of the inner race is formed with a small flange portion for limiting axial movement of the tapered rollers and a cylindrical portion which has a smaller diameter than that of the small flange portion, wherein the cage includes a small-diameter end portion which is positioned at the small-diameter end portion of the inner race and a large-diameter end portion which is positioned at the large-diameter end portion of the inner race, and wherein the small-diameter end portion of the cage includes a bent portion which is faced to and is out of contact with an outer surface of the cylindrical portion of the inner race with a predetermined clearance therefrom such that a labyrinth is formed between the small-diameter end portion and the inner race.