| 摘要 |
<p>There is provided a double-row angular contact ball bearing superior in circularity of a bearing ring. The double-row angular contact ball bearing is provided with an inner ring (1), an outer ring (2), balls (3) in two rows, a cage (4) for holding the balls (3) in the respective rows between the inner ring (1) and the outer ring (2), and non-contact sealing devices 5 each being made of a substantially disc-like member. The sealing device (5) is made of a metallic material such as steel, and radial outer end portions (5a) are respectively fit and swaged into grooves (2b) arranged at both of the axial end portions of the inner circumferential surface of the outer ring (2). The ratio Ts/Tr is equal to or lower than 0.07, where Ts is thickness of the sealing device (5) and Tr is thickness of the outer ring (2) at the bottom portion of the groove (2b). In addition, the diameter of the ball (3) is equal to or greater than 75 % of a half a bearing width to equal to or greater than 83 % thereof. Furthermore, an axial width Tc of the radial outer end portion (5a) having a substantially letter U shape is equal to or smaller than 2.7 mm.</p> |
