| 摘要 |
A retainer for rolling bearings 1 is made from a phenol resin in which graphite 11 and cotton fabric chips 12 are mixed, and an inner circumferential surface 7 and side surfaces 5, 6 other than inner circumferential surfaces 2A of the pockets of the retainer are made of a skin layer 8. Therefore, the strength can be ensured with this skin layer 8, while the skin layer 8 is absent in the inner circumferential surfaces 2A of the pockets serving as sliding surfaces, allowing the graphite 11 and the cotton fabric chips 12 to be exposed, so that the lubricating performance can be ensured. Thus, a retainer for rolling bearings, as well as a manufacturing method therefor, which allows lubricating performance and strength to be ensured at the same time can be provided. <IMAGE> |
