Wheel supporting hub unit, and wheel support hub unit raceway ring member, and a manufacturing method thereof
2004
PROBLEM TO BE SOLVED: To provide an inexpensive wheel support hub unit capable of forming a positioning cylinder part integrally in a continuous cylindrical shape in the circumferential direction and forming it with a low load by cold forging without performing bending or the like on a mounting part. A bearing ring member is provided. A wheel support having a wheel or vehicle body mounting portion extending radially outward from a solid or hollow shaft portion, and a wheel or vehicle body positioning tube portion disposed concentrically with the shaft portion. This is a bearing ring member 6 of the hub unit for use, and the attachment portion 7 is integrally formed with the shaft portion 5 by cold side extrusion. [Selection] Figure 1
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