Abstract: A vehicle hub unit includes: an outer ring; rolling elements; a hub wheel that is arranged radially inward of the outer ring via the rolling elements; and an inner ring member that is fixed to an end portion of a hub spindle of the hub wheel by clinching. A spline tooth portion that meshes with a tooth portion of a constant velocity joint that transmits driving force to the hub unit is formed at a clinched portion of the hub spindle. A protruding portion is formed at a radially inner side portion of a bottom of the spline tooth portion.

Abstract: In a wheel bearing assembly, the length of an annular protrusion in an axis direction, or the oscillation angle through which the center axis of a calk jig is oscillatingly turned relative to the center axis of a constant-velocity joint outer ring is restricted so that the annular protrusion and the calk jig do not interfere with each other when the constant-velocity joint outer ring is calk-fixed to the calk fixation portion of the wheel hub by radially outwardly bending a tubular protrusion formed on an end surface of the center shaft portion through the oscillating turn of the calk jig after the center shaft portion of the constant-velocity joint outer ring has been fitted to the hollow hole of the wheel hub.

Abstract: There is provided a manufacturing method for a vehicle hub unit in which a hub wheel is arranged radially inward of an outer ring via rolling elements, an inner ring member is fixed to an end portion of a hub spindle of the hub wheel by clinching, a spline tooth portion that meshes with a tooth portion of a constant velocity joint that transmits driving force to the hub unit is formed at a clinched portion of the hub spindle, and a protruding portion is formed at a radially inner side portion of a bottom of the spline tooth portion. The clinched portion is formed by plastically deforming a cylindrical end portion of the hub spindle outward with a clinching tool. The clinching tool includes a punch and an oscillating spindle to which the punch is non-rotatably attached.

Abstract: A vehicle hub unit includes: an outer ring; rolling elements; a hub wheel that is arranged radially inward of the outer ring via the rolling elements; and an inner ring member that is fixed to an end portion of a hub spindle of the hub wheel by clinching. A spline tooth portion that meshes with a tooth portion of a constant velocity joint that transmits driving force to the hub unit is formed at a clinched portion of the hub spindle. A protruding portion is formed at a radially inner side portion of a bottom of the spline tooth portion.

Abstract: In a wheel bearing assembly, the length of an annular protrusion in an axis direction, or the oscillation angle through which the center axis of a calk jig is oscillatingly turned relative to the center axis of a constant-velocity joint outer ring is restricted so that the annular protrusion and the calk jig do not interfere with each other when the constant-velocity joint outer ring is calk-fixed to the calk fixation portion of the wheel hub by radially outwardly bending a tubular protrusion formed on an end surface of the center shaft portion through the oscillating turn of the calk jig after the center shaft portion of the constant-velocity joint outer ring has been fitted to the hollow hole of the wheel hub.