Patent ID: 7637819

Claim:
An inner joint part for a constant velocity plunging joint comprising: an outer spherical guiding face for guiding a ball cage of the constant velocity universal joint; a plurality of circumferentially distributed ball tracks formed into the spherical guiding face and provided for receiving torque transmitting balls; wherein the ball tracks each comprise a hard-machined first track portion for guiding the balls, and a second track portion which does not have a guiding function for the balls; a first front face in which the first track portions end; and an axially opposed second front face in which the second track portions end; wherein a plane (E) is defined which extends perpendicularly relative to a longitudinal axis (A) of the inner joint part and which contains the greatest diameter of the spherical guiding face, wherein a first distance between the first front face and said plane (E) is longer than a second distance between the second front face and said plane (E), and wherein the second track portion of the ball tracks and said first front face of the inner joint part start from a preformed forging and are unmachined.