| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball bearing that hardly causes seizure of a sliding part such as a raceway groove while enabling achievement of low torque by enabling reduction in the amount of fluent lubricant encapsulated in a ball arrangement chamber.SOLUTION: A ball bearing includes: an outer ring 1; an inner ring 2 that has a ring-shaped member attachment part having step parts 51 and 52 almost elongated in the radial direction of the outer ring 1, and an outer peripheral surface part 55; a ball 3 that is arranged between an inner peripheral raceway groove 11 of the outer ring 1 and an outer peripheral raceway groove 21 of the inner ring 2; and ring-shaped lubricant supply members 5 and 6 that are fixed to the ring-shaped member attachment part in the state of abutting on the step parts 51 and 52. |
