| 摘要 |
A rolling bearing unit includes: a rolling bearing having an inner ring, an outer ring arranged, multiple rolling elements, a cage and a cage guide member (50) that is formed integrally with the outer ring or formed as a member different from the outer ring, and that is fixed to the housing side. The cage guide member has a guide projection (53) projected into an annular space between the inner and outer rings having a peripheral face serving as the guide face, and a grease supply portion (61) having a grease reservoir portion in which the grease is reserved. A supply port through which the grease is supplied from the grease reservoir portion to the guide face is formed on the outer peripheral face of the guide projection, at a position closer to a base end portion of the guide projection than the guide face. |
