Patent ID: 7927220

Claim:
A constant velocity universal ball joint in the form of a counter track joint, comprising: an outer joint part with first and second outer ball tracks, an inner joint part with first and second inner ball tracks, wherein said first outer ball tracks and said first inner ball tracks form first pairs of tracks which widen (α) in a first axial direction (Ri 1 ) and wherein said second outer ball tracks and said second inner ball tracks form second pairs of tracks which widen (β) in a second axial direction (Ri 2 ), balls which are guided in said pairs of tracks and whose ball centres (Z) are positioned on a pitch circle radius (PCR) around a joint centre (M), a ball cage with circumferentially distributed cage windows in which said balls are held in a common central plane (E) and are guided on to an angle-bisecting plane when the joint is articulated, wherein between said outer joint part and said ball cage on the one hand and between said ball cage and said inner joint part on the other hand, there is provided an axial clearance which permits a relative axial displacement (S) between said outer joint part and said inner joint part, wherein when said joint is in an aligned condition, the ratio between said relative axial displacement (S) and said pitch circle radius (PCR) of said balls ranges between 0.01 and 0.09 (0.01<S/PCR<0.09).