| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a wheel bearing device that allows easily and efficiently managing bearing clearance and providing accurate clearance. <P>SOLUTION: A manufacturing method is provided for a wheel bearing device in which, of groups of double row balls 3, the group of outer balls 3 have their pitch circle diameters PCDo set to be larger than the pitch circle diameters PCDi of the group of inner balls 3, and in which an inner ring 5 is axially fixed in place by a tightening part 8 formed by the plastic deformation of an end of the small-diameter stepped portion 4b of a hub ring 4. The double-row outer rolling surfaces 2a, 2b of an outer member 2 are first ground by a formed grinding wheel and their touch diameters and touch-part pitch lengths are computed while the diameter of a prepared ball 3 is taken into consideration. This information is fed back to a grinding process for the respective inner rolling surfaces 4a, 5a of the hub ring 4 and the inner ring 5 and the inner rolling surfaces 4a, 5a are ground. <P>COPYRIGHT: (C)2008,JPO&INPIT |
