| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller bearing that can simplify greasing work. SOLUTION: The roller bearing 10 has a cage 20 for holding a multitude of rollers 15 arranged between an outer ring raceway surface 13 of an outer ring 11 and an inner ring raceway surface 14 of an inner ring 12. The cage 20 has a pair of annular portions 21 coupled by a multitude of post portions 22, and the external surface of each annular portion 21 is guided along the internal surface of a rib portion 16. The annular portions 21 have, at an opened end, a taper surface 24 spaced from the internal surface of the rib portions 16.
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