To provide a thrust bearing enabling reduction of wear of a bearing ring in the thrust bearing.
A thrust bearing includes a first bearing ring 11 having a first raceway surface 11a, a second bearing ring 12 having a second raceway surface 12a, a plurality of rolling elements 13 disposed rotatably between the first raceway surface 11a and the second raceway surface 12a, and a retainer 14 for retaining the plurality of rolling elements 13 circumferentially at substantially equal intervals, and is used in a hydraulic continuously variable transmission 30, and a contact surface 20 of the first bearing ring 11 or the second bearing ring 12 with which a nose piston 35 of the hydraulic continuously variable transmission 30 comes into contact is formed with a peripheral groove 21 with a cross section in an arc shape.
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Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
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