| 摘要 |
PROBLEM TO BE SOLVED: To provide an angular ball bearing equipped with a retainer which can prolong a grease life, by stabilizing an amount of grease supplied to a rolling contact surface from the retainer.SOLUTION: In an angular ball bearing 10 grease-lubricated, a retainer 20 has a convex portion 24 whose inner diameter is smaller than a pitch circle diameter PCD of a ball 13, in a radial direction inner side and an axial direction center portion. In a cross section shape of the retainer 20, an axial direction distance A from an axial direction center portion of the retainer 20 to an uprise starting point 24a of the convex portion 24 is larger than an axial direction distance A' from a perpendicular line to a bearing rotation axis from a center point of the ball 13, to a position of a contact angle line L of the ball 13 in a radial direction position of the uprise starting point 24a.SELECTED DRAWING: Figure 1 |
