Patent ID: 9644672
Date: 2017-05-09
CPC Classifications: F16C

Claim:
1. A tapered roller bearing comprising: an outer ring having an outer-ring raceway surface that increases in diameter from a first side toward a second side in an axial direction; an inner ring having an inner-ring raceway surface facing the outer-ring raceway surface and having a cone back face rib that is located on the second side of the inner ring in the axial direction and that protrudes outward in a radial direction; a plurality of tapered rollers interposed between the outer-ring raceway surface and the inner-ring raceway surface and contacting the cone back face rib; an annular cage that holds the tapered rollers spaced at intervals in a circumferential direction; and a reservoir portion that is provided on the second side of the outer ring in the axial direction and having a recessed groove that is formed on an inner periphery of the reservoir portion and in which lubricant is stored, wherein the recessed groove has a recess and protrusion at its bottom.