Abstract: A process of producing an inner joint part for a constant velocity plunging joint is disclosed. The process includes providing a preformed blank, hardening the preformed blank, hard-machining first track portions, while second track portions remain unmachined. The preformed blank includes a longitudinal axis, an outer face with circumferentially distributed tracks, a central through-aperture, a first end face and a second end face opposed thereto. The tracks each comprise a first track portion having, in a cross-sectional view, a smaller track radius and a second track portion having, in a cross-sectional view, a greater cross-section.

Abstract: An inner joint part for a constant velocity universal joint, more particularly a constant velocity plunging joint. The inner joint part (2) includes an outer spherical guiding face (3) for guiding a ball cage (24) of the constant velocity universal joint; a plurality of circumferentially distributed ball tracks (4) formed into the spherical guiding face (3) and provided for receiving torque transmitting balls (25); wherein the ball tracks (4) each comprise a hard-machined first track portion (11) for guiding the balls (25) as well as an unmachined second track portion (12) which does not have a guiding function for the balls. A process of producing an inner joint part as well as a constant velocity universal joint with an inner joint part are also provided.

Abstract: A ball cage for a constant velocity plunging joint which having an outer joint part with a internally cylindrical guiding face and an inner joint part with an outer spherical guiding face and torque transmitting balls held in the ball cage. The ball cage includes a plurality of circumferentially distributed windows (3) for receiving the torque transmitting balls, and defining a central window plane (M); an outer free face (10) and an outer spherical control face (9) for guiding the ball cage relative to the outer joint part; and an inner spherical control face (16) for guiding the ball cage relative to the inner joint part. The center of the outer spherical control face (9) and the center of the inner spherical control face (16) are positioned at an axial distance from the central window plane (M). The outer spherical (9) is hard-machined and the outer free face (10) is soft-machined.

Abstract: An inner joint part for a constant velocity universal joint, more particularly a constant velocity plunging joint. The inner joint part (2) includes an outer spherical guiding face (3) for guiding a ball cage (24) of the constant velocity universal joint; a plurality of circumferentially distributed ball tracks (4) formed into the spherical guiding face (3) and provided for receiving torque transmitting balls (25); wherein the ball tracks (4) each comprise a hard-machined first track portion (11) for guiding the balls (25) as well as an unmachined second track portion (12) which does not have a guiding function for the balls. A process of producing an inner joint part as well as a constant velocity universal joint with an inner joint part are also provided.

Abstract: An inner joint part for a constant velocity universal joint, more particularly a constant velocity plunging joint. The inner joint part (2) includes an outer spherical guiding face (3) for guiding a ball cage (24) of the constant velocity universal joint; a plurality of circumferentially distributed ball tracks (4) formed into the spherical guiding face (3) and provided for receiving torque transmitting balls (25); wherein the ball tracks (4) each comprise a hard-machined first track portion (11) for guiding the balls (25) as well as an unmachined second track portion (12) which does not have a guiding function for the balls. A process of producing an inner joint part as well as a constant velocity universal joint with an inner joint part are also provided.

Abstract: A ball cage for a constant velocity plunging joint which having an outer joint part with a internally cylindrical guiding face and an inner joint part with an outer spherical guiding face and torque transmitting balls held in the ball cage. The ball cage includes a plurality of circumferentially distributed windows (3) for receiving the torque transmitting balls, and defining a central window plane (M); an outer free face (10) and an outer spherical control face (9) for guiding the ball cage relative to the outer joint part; and an inner spherical control face (16) for guiding the ball cage relative to the inner joint part. The center of the outer spherical control face (9) and the center of the inner spherical control face (16) are positioned at an axial distance from the central window plane (M). The outer spherical (9) is hard-machined and the outer free face (10) is soft-machined.

Abstract: A constant velocity universal ball joint has an outer joint part, an inner joint part and torque transmitting balls held in a cage. The cage has centers of curvature (M.sub.1, M.sub.2) of the outer spherical face (14, 44) and of an inner spherical face (14, 44) of the ball cage (4, 34) which are axially offset relative to a central cage plane (E), defined by the circumferentially extending center lines (L.sub.m) of the cage windows (12, 42). The center of curvature (M.sub.1) of the outer spherical face (13, 43) is positioned towards the aperture (8, 38) in the outer joint part (2, 32), and the center of curvature (M.sub.2) of the inner spherical face, (14, 44), is positioned towards the end of the outer joint part (2, 32) located axially opposite the aperture (8, 38).