| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of creep at a fitting surface of an inner ring and a shaft by engaging a projecting part provided on a side of one inner ring with a recessed part provided in a side of the other inner ring. SOLUTION: In a double row angular ball bearing, a plurality of same rectangular recessed parts 4a are provided in a side of one inner ring 4 with intervals in the circumferential direction. A plurality of same rectangular projecting parts 4b are provided on a side of the other inner ring 4 with interval in the circumferential direction, and engaged with the recessed parts 4a in the side of one inner ring. When a large load in the radial direction is applied to one inner ring 4, the inner ring 4 to which the load is applied slides on a shaft 5 in the circumferential direction. However both inner rings 4 are engaged due to rugged parts of the side of the inner ring 4, and the relative rotation in the circumferential direction of both inner rings 4 to the shaft 5 is prevented, and both inner rings are integratedly rotated. As a result, generation of a creep causing a problem on the bearing performance can be suppressed, and the service life of the bearing can be improved.
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