| 摘要 |
A ball bearing unit including two sets of retained balls (5) with inner and outer raceways (6, 8) for each set. At least one of the raceways is given a configuration in section of a concave portion (10) leading into a flattened portion (11) extending in a direction away from its adjacent concave portion beyond the balls. This construction is intended to act as an alternative to roller bearings in lightly loaded applications. <IMAGE> |
