| 摘要 |
PROBLEM TO BE SOLVED: To increase service life in the case when foreign matter is mixed with lubricating oil on an automatic aligning roller bearing the outer diameter of an inner ring of which is larger on the central side than both side parts in the cross direction and to be lubricated by coil. SOLUTION: A cage 4 is constituted of a ring part 41 on which a pocket to hold a roller 3 is formed, a flange part 42 curved to the side of an inner ring 1 from an outer end part of this ring part 41 in the cross direction and a holding part 43 to hold and inside end surface of the roller 3. The flange part 42 has an inner peripheral surface 42a to face against each of end parts in the cross direction of an outer peripheral surface 11 of the inner ring 1. When an inner diameter (diameter) of the inner ring 1 is specified as da, an outer diameter (diameter) of an end part in the cross direction of the inner ring 1 is specified as d1, an inner diameter (diameter) of the inner peripheral surface 42a of the cage 4 is specified as d2 and (d2-d1)=t, these (t) and (da) are made to satisfy a following expression (1). 0.5<=(t/da)×100<=1.0...(1). |
