| 摘要 |
A tapered roller bearing of the type having a protrusion on the retainer that is axially brought into engagement with the flange of the inner race is provided, wherein no stress concentration occurs on the flange of the inner race, which guide the tapered rollers and which is small and has a large load bearing capacity. The inner race 2 has a flange 6 for guiding the tapered rollers 4 only at the large-diameter end of the raceway 2a. The retainer 5 has on the large-diameter side thereof a protrusion 7 radially inwardly extending and axially engaging the flange 6 of the inner race 2. The flange 6 of the inner race 2 is formed with a circumferentially continuous cutout groove 6a having a smoothly curved concave surface through which the radially outer surface and the outer end surface of the flange 6 are connected to each other, and the protrusion 7 of the retainer 5 has its inner side at its radially inner end portion in engagement with the cutout groove 6a, thereby making it possible to reduce the size of the tapered roller bearing and increasing its load bearing capacity, while preventing stress concentration on the flange 6 of the inner race 2 for guiding the tapered rollers 4.
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