| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ball bearing which hardly causes the locking due to the biting of a separator.SOLUTION: A ball bearing includes: an inner ring; an outer ring; a plurality of balls arranged freely rollably between the inner ring and the outer ring; and an annular retainer along the inner ring and the outer ring. Therein, the balls are provided in a pocket which retains the balls in the retainer, and separators are provided in the pocket which retains the separators of solid lubricant in the retainer arranged between adjacent two balls. The separators are cylindrical-shaped members of which both edge surfaces (both bottom surfaces of a column) are confronted with the balls. Diameter b of the ball, diameter d of the separator and the total amount t of gaps between the balls and the separators in the circumferential direction satisfy the following relations: 0.6b≤d≤0.95b, 0.3b≤t≤2b.</p> |
