Patent ID: 8827566

Claim:
A thrust roller bearing with races, comprising: a circular ring-shaped cage having pockets that are long in the radial direction formed at a plurality of locations in the circumferential direction; a plurality of rollers that are arranged in the pockets so as to be able to roll freely; and a first thrust race and second thrust race that are combined so as to be able to rotate relative to the cage and so as not to be able to separate; the first thrust race which is formed by bending a hard metal plate comprising: a first thrust race section that has a flat circular ring shape; a cylindrical outer-diameter side flange that is formed by bending the outer circumferential edge of the first thrust race toward one side in the axial direction; and outer-diameter side locking sections that are formed at a plurality of locations in the circumferential direction of the tip-end edge of the outer-diameter side flange, and protrude toward the inside in the radial direction from the tip-end edge of the outer-diameter side flange; in which the height dimension in the axial direction of the outer-diameter side flange in portions where the outer-diameter side locking sections are not formed is less than portions where the outer-diameter side locking sections are formed, and the outer diameter of the outer-diameter side flange is 60 mm to 120 mm, the second thrust race which is formed by bending a hard metal plate comprising: a second thrust race section that has a flat circular ring shape; a cylindrical inner-diameter side flange that is formed by bending the inner circumferential edge of the second thrust race toward one side in the axial direction; and inner-diameter side locking sections that are formed at a plurality of locations in the circumferential direction of the tip-end edge of the inner-diameter side flange, and protrude toward the outside in the radial direction from the tip-end edge of the inner-diameter side flange; in which the inner diameter of the inner-diameter side flange is 40 mm to 80 mm; and in case that, with the outer-diameter side flange, the inner-diameter side flange and the cage concentrically arranged, the sum of the dimensions in the radial direction of the ring-shaped gaps that exist between the inner circumferential surface of the outer-diameter side flange and the outer circumferential surface of the cage and between the outer circumferential surface of the inner-diameter side flange and the inner circumferential surface of the cage is taken to be an internal gap inside the thrust roller bearing with races, this internal gap being within the range of 1 mm to 2 mm.