Abstract: A pillar includes a radially outer projection that is formed at the radially outer side of a pillar's wall surface facing a pocket so as to project in the circumference direction and restricts radially outward movement of a roller. A radially inner projection is formed at the radially inner side of the pillar's wall surface facing the pocket so as to project in the circumference direction and restrict radially inward movement of the roller. Allowable distance Lo to which the roller can move radially outward from a pitch circle PCD of the rollers under the restriction of the radially outer projections and allowable distance Li to which the roller can move radially inward from the pitch circle PCD of the rollers under the restriction of the radially inner projections satisfy the relationship Lo>Li. The cage solves the problem that the rollers get caught by the roller retaining elongated projections.

Abstract: A pillar includes a radially outer projection that is formed at the radially outer side of a pillar's wall surface facing a pocket so as to project in the circumference direction and restricts radially outward movement of a roller. A radially inner projection is formed at the radially inner side of the pillar's wall surface facing the pocket so as to project in the circumference direction and restrict radially inward movement of the roller. Allowable distance Lo to which the roller can move radially outward from a pitch circle PCD of the rollers under the restriction of the radially outer projections and allowable distance Li to which the roller can move radially inward from the pitch circle PCD of the rollers under the restriction of the radially inner projections satisfy the relationship Lo>Li. The cage solves the problem that the rollers get caught by the roller retaining elongated projections.