| 摘要 |
PROBLEM TO BE SOLVED: To provide a four-point contact ball bearing which can prevent a creep between an outer ring and a housing without increasing man-hours and the number of part items, and without causing directivity at the bearing.SOLUTION: When setting an angle from an axial center position of an outer ring raceway surface 11a with a center of a ball 13 as a center point P0 in which the outer ring raceway surface 11a and an inner ring raceway surface 12a contact with the ball 13 at two points, and up to a contact position of the outer ring raceway surface 11a and the ball 13 as a rest angle α, a wall thickness of an outer ring 11 along a linear line L extending to the rest angle αdirection as Hα, a diameter of the ball 13 as Da, a width in an axial direction between cross points Px of the linear line L extending to the left and right rest angle αdirection and the outer ring 11 as Bα, and a width of the outer ring 11 in the axial direction as B, relationships of 0.40Da≤Hα≤0.80Da, and Bα<B are satisfied. |
