| 摘要 |
PROBLEM TO BE SOLVED: To obtain a retainer for ball bearing that can stably supply the lubricating oil being supplied or filled up between an inner ring and an outer ring of bearing all the time to a clearance between a ball and an inside of retainer pocket. SOLUTION: In a retainer 19 for ball bearing with several pieces of pockets 31 that retains and accommodates several pieces of balls 17 that are equipped between an inner and an outer ring 13, 15 of ball bearing 11 to revolution free, it makes to enable the feeding of lubricating oil that is supplied between an inner and outer ring 13, 15 to the opening between balls 17 and pocket inside 31a through the communicating hole 35, notwithstanding the location of balls 17 in a pocket 31 by providing a communicating hole 35 that communicates an inside of the pocket 31 to the space 25 between an inner and an outer ring 13, 15 of a rear side of the pocket 31 on the circumference wall of each pocket 31. |
