Patent ID: 8801295

Claim:
A retainer for a tapered roller bearing, comprising: a first side having a first radius and a second side having a second radius, wherein the first radius is smaller than the second radius; a first ring portion at the first side of the retainer; a second ring portion at the second side of the retainer; a plurality of brace portions arranged between the first ring portion and the second ring portion; and a hook portion formed at the second side of the retainer, the hook portion being engaged with a second side of an inner race, the second side of the inner race having a radius that is larger than a radius of a first side of the inner race; wherein the retainer is made of a resin material and is configured to retain tapered rollers in pockets formed between the plurality of brace portions, wherein an outer diameter of each of the pockets at the first side of the retainer is larger than an inner diameter of the hook portion, wherein the hook portion comprises an outer end surface, a radially inner end, and a guide inclined surface extending from the outer end surface to the radially inner end so as to incline toward the first side of the retainer, and wherein an inclination angle of the guide inclined surface with respect to the outer end surface is within a range from 10° to 30°, and a radial length of the guide inclined surface is within a range from 20% to 40% of a radial length of the hook portion.