| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radial ball bearing cage whose seizure is prevented and whose noises are reduced by sufficiently supplying lubricant between each pocket of the cage and each ball to improve the condition of lubricating the cage, and to provide a radial ball bearing. <P>SOLUTION: The radial ball bearing cage 20 is annularly formed as a whole to rollingly hold a plurality of balls arranged between the raceway surfaces of the radial ball bearing, where pockets 18 are provided at a plurality of positions in the circumferential direction. At the edges where concave portions 21-23 for the balls 5 in the pockets to be located cross side faces 27, 28 of the cage, lubricant introducing portions 35, 36 are provided so that the lubricant is introduced between the ball and the concave portion. <P>COPYRIGHT: (C)2009,JPO&INPIT |
