Abstract: A reference setting tool for measuring a shape of a side face spline is used to measure the shape of driven teeth that are formed on an axial end face of a vehicle hub unit and that are meshed with drive teeth of a constant velocity joint. The reference setting tool includes: reference teeth that are formed so as to be aligned along a circular ring and so as to have the same shape as the drive teeth of the constant velocity joint; and a reference surface that has a predetermined correlation with the reference teeth, and that is used to set a reference position for measuring the shape of the driven teeth with the reference teeth in mesh with the driven teeth.

Abstract: A flaw detection testing device that carries out a flaw detection test on an outer peripheral surface of a clinched portion used to fix an inner ring member of a hub unit to a hub spindle includes: a flaw detection sensor; a clearance setting member that contacts the outer peripheral surface of the clinched portion to set a clearance between the flaw detection sensor and the outer peripheral surface of the clinched portion at a predetermined value; a fixing device that fixes a position of the flaw detection sensor with the clearance between the flaw detection sensor and the outer peripheral surface kept at the predetermined value; and an actuating device that moves the clearance setting member in such a direction that the clearance setting member is separated from the outer peripheral surface of the clinched portion with the position of the flaw detection sensor fixed by the fixing device.

Abstract: A reference setting tool for measuring a shape of a side face spline is used to measure the shape of driven teeth that are formed on an axial end face of a vehicle hub unit and that are meshed with drive teeth of a constant velocity joint. The reference setting tool includes: reference teeth that are formed so as to be aligned along a circular ring and so as to have the same shape as the drive teeth of the constant velocity joint; and a reference surface that has a predetermined correlation with the reference teeth, and that is used to set a reference position for measuring the shape of the driven teeth with the reference teeth in mesh with the driven teeth.

Abstract: A flaw detection testing device that carries out a flaw detection test on an outer peripheral surface of a clinched portion used to fix an inner ring member of a hub unit to a hub spindle includes: a flaw detection sensor; a clearance setting member that contacts the outer peripheral surface of the clinched portion to set a clearance between the flaw detection sensor and the outer peripheral surface of the clinched portion at a predetermined value; a fixing device that fixes a position of the flaw detection sensor with the clearance between the flaw detection sensor and the outer peripheral surface kept at the predetermined value; and an actuating device that moves the clearance setting member in such a direction that the clearance setting member is separated from the outer peripheral surface of the clinched portion with the position of the flaw detection sensor fixed by the fixing device.