| 摘要 |
A rolling bearing of the present invention includes an outer spacer arranged adjacent to an outer ring. On the outer spacer, a guide surface opposing a guided surface of a cage is formed such that the guide surface can slidably contact the guided surface. On the guided surface, an annular groove is provided. In the outer spacer, a flow path for oil air is provided. A discharge opening of the flow path in the guide surface opposes the annular groove within an opening width of the annular groove in the radial direction. The annular groove includes a pair of side wall surfaces inclined in opposite directions to each other so that a distance between the side wall surfaces is gradually decreased from an opening side toward a groove bottom side. The annular groove is formed such that the distance between the pair of opposing side wall surfaces is larger than a diameter of the discharge opening at a part closest to the opening side and is smaller than the diameter of the discharge opening at a part closest to the groove bottom side. |
