| 摘要 |
<p>A bearing (5, 5a) has a stationary-side raceway faces (11a, 11b) on stationary-side peripheries, a stationary ring (6) supported by and fixed to a suspension device in use condition, rotation-side raceway faces (14a, 14b) on rotation-side peripheries, a rotating wheel (8) to which a wheel and a rotating body for braking are fixed in use condition, and plural balls (17) arranged between the rotation-side raceway faces and the stationary-side raceway faces. The standard value for relative differences between the balls is set to 1.0 mum or less.</p> |
