| 摘要 |
PROBLEM TO BE SOLVED: To increase the amount of grease filled into a rolling bearing and obtain an enhancing effect in lubricating performance corresponding to the increased amount.SOLUTION: An outer ring 3 of a rolling bering includes a plurality of rows of raceway surfaces 3a, and an inside inner peripheral surface 3b positioned between the plurality of rows of raceway surfaces 3a. A peripheral groove 15 is formed in the inside inner peripheral surface 3b of the outer ring 3, and a large diameter portion 13 is formed by a groove bottom surface 15a of the peripheral groove 15. An inner periphery of the outer ring 3 in a direction with the peripheral groove 15 extending is provided with a small diameter portion 14 having a smaller diameter than the large diameter portion 13 and smoothly connected to the large diameter portion 13. |
