| 摘要 |
<p>In a vehicle bearing device hub spindle, annular first to third grinding undercut portions (19a-c) , each being a recess in sectional view, are formed in the same shape, through turning, at a large-rib-surface-side (12a) end portion of an inner raceway surface (13), a large-diameter-portion-side end portion of the inner raceway surface, and a large-diameter-portion-side end portion of an outer peripheral surface of an intermediate-diameter portion.</p> |
