| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tandem type double row angular ball bearing in which creep hardly occurs and which can stably support a pinion shaft, when used for a pinion shaft bearing device. <P>SOLUTION: The tandem type double row angular ball bearing 1 includes a single outer ring 2 having a large diameter outer ring raceway surface 2a and a small diameter outer ring raceway surface 2b, a single inner ring 3 having a large diameter inner ring raceway surface 3a opposed to the large diameter outer ring raceway surface 2a in the radial direction and a small diameter inner ring raceway surface 3b opposed to the small diameter outer ring raceway surface 2b in the radial direction, a large diameter side ball group stored between the large diameter outer ring raceway surface 2a and the large diameter inner ring raceway surface 3a, a small diameter side ball group stored between the small diameter outer ring raceway surface 2b and the small diameter inner ring raceway surface 3b, and cages 8, 9 for holding balls 5, 6 each constituting the ball group at circumferential equally distributed positions. It rotatably supports a cylindrical rotary member to be fitted to the outer peripheral face of the outer ring 2. The outer ring 2 as a rotation side member is formed of carburized steel having a carbon content of 0.5-1.2%. <P>COPYRIGHT: (C)2009,JPO&INPIT |
