Constant velocity universal ball joint

A constant velocity universal ball joint for a wheel hub/universal joint unit comprising:

• a wheel hub, a universal ball joint with an inner and outer joint part, a bearing assembly arranged on the wheel hub and tensioned relative thereto by the outer joint part of the universal joint;
• an unfastenable or disconnectable connection between the wheel hub and universal joint including a bolt/nut assembly comprising at least two parts;
• said outer joint part and the inner joint part having longitudinally extending ball tracks which are arranged radially opposite one another and torque-transmitting balls which are held in said radially opposite one another ball tracks and are held in one plane in individual windows of a ball cage positioned between the outer joint part and the inner joint part and which, upon articulation of the joint, are moved on to the angle-bisecting plane, with the outer joint part, at a wheel hub-turned end, being closed by a base part and the inner joint part being connected to a shaft, said base part being insertable from the wheel hub-turned end into an aperture at the wheel hub-turned end and forming one of the parts of the bolt/nut assembly for holding the wheel hub, the bearing assembly and the outer joint part relative to one another, said base part being unfastenable from an abutment means on said outer joint part for said base part in the axial direction and said outer joint part on the one hand, and one of said base part and said wheel hub, on the other hand, each of the base part, wheel hub and outer joint part having form locking means mutually engaging one another in a rotational direction and that the base part connected to the outer joint part permanently extends into a space inside the outer joint part occupied temporary by the ball cage or the inner joint part during assembling of the joint.