Patent ID: 8510955

Claim:
A process of producing an inner joint part for a constant velocity plunging joint, the process comprising: providing a preformed blank with a longitudinal axis, said preformed blank having an outer face with circumferentially distributed ball tracks, a central through-aperture, a first end face and a second end face opposed thereto, wherein the ball tracks each comprise a first track portion having a first track radius; in a cross-sectional view and a second track portion having a second track radius in a cross-sectional view, said first track radius being smaller than said second track radius; soft-machining the second end face to produce a soft-machined second front face into which the second track portions open, wherein the first end face into which the first track portions open remains unmachined and forms an unmachined first front face; hardening the preformed blank; hard-machining the outer face to produce a spherical guiding face; hard-machining the first track portion of said ball tracks, wherein the second track portions of said ball tracks remain unmachined; wherein, after machining, a first distance between the unmachined first front face and a plane, which extends perpendicular relative to said longitudinal axis and which contains a greatest diameter of a spherical guiding face, is longer than a second distance between the soft-machined second front face and said plane.