| 摘要 |
A roller bearing in which a plurality of pockets ( 3 ) parallel to an axial center line are formed in an outer peripheral surface ( 2 ) of a ring-shaped cage ( 1 ). Rollers ( 5 ) are rotatably assembled in the pockets ( 3 ), and an annular piece ( 7, 7 ) having a shape bent in an inner diametrical direction with respect to the outer peripheral surface ( 2 ) is formed in a side surface of the cage ( 1 ). A concave portion ( 9, 9 ) continuously provided in a circumferential direction of the cage ( 1 ) is formed in any one of an inner side of the outer peripheral surface ( 2 ) in the cage ( 1 ), an inner side of the annular piece ( 7, 7 ) and an inner side of a corner portion ( 8, 8 ) where they intersect, or astride any one of the inner side of the outer peripheral surface ( 2 ), the inner side of the annular piece ( 7, 7 ) and the inner side of the corner portion ( 8, 8 ) where they intersect.
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