Patent ID: 7771122

Claim:
A cage for a rolling bearing, the cage comprising: a first annular portion; a second annular portion opposed to the first annular portion in an axial direction of the first annular portion; a plurality of pillar portions which are spaced from one another in a circumferential direction of the first annular portion, and interconnect the first and second annular portions, each of the pillar portions having a concave surface formed in an outer peripheral surface thereof; a plurality of first recesses which are formed in an outer peripheral surface of the first annular portion, and are spaced from one another in the circumferential direction, the first recesses being disposed axially outwardly of an axial inner end face of the first annular portion, and being disposed axially inwardly of an axial outer end face of the first annular portion; and first passageways which extend generally in the axial direction, each of the first passageways including an axially outward end which is open to the corresponding first recess and an axially inner end which is open to the axial inner end face of the first annular portion or to the concave surface of the pillar portion.