| 摘要 |
PROBLEM TO BE SOLVED: To easily reduce torque due to shear resistance of an lubricating oil by a ball. SOLUTION: A ball bearing retainer for which hemispherical pockets 12 which house balls are formed in multiple locations in the circumferential direction on the opposing surfaces 11 of two ring-shaped bodies 10 which oppose one another in the axial direction, and the opposing surfaces 11 are brought into contact and the two ring-shaped bodies 10 are connected by means of connections 18 provided at both circumferential ends of the pockets 12. Recessed grooves 19 for a lubricant are provided on the inner circumferential surface of the pockets 12. COPYRIGHT: (C)2013,JPO&INPIT |
