the ball joint according to the embodiments consists of a housing 1 and the ball pivot 2 which is inserted with a joint ball 3 , provided on one of its ends , into the housing 1 by means of a joint cup 4 . the housing 1 can be connected by fastening means not recognizable in the drawing to a component of a motor vehicle , and a slightly tapered ( and slightly conical ) shaft part 5 of the ball pivot 2 can be connected to another vehicle part such as a bearing lug 6 of a motor vehicle . a sealing cuff 7 , made of an elastic material , is provided between the housing 1 and the ball pivot 2 , and one end of the sealing cuff is fastened to the housing 1 , and its other end is fastened to the ball pivot 2 . the fastening to the housing consists , for example , of a beaded edge at the end of the sealing cuff 7 , which engages with a circumferential groove on the housing 1 and is fastened therein by means of one or several retaining rings 8 . the edge profile 9 is fastened to the other end of the sealing cuff 7 in a positive - locking manner , so that movements between the edge profile 9 of the sealing cuff 7 and the ball pivot 2 are impossible in the axial direction and the radial direction alike . in this case , the width of the sealing cuff 7 and / or its elasticity are to be selected such that rotary movements around the longitudinal axis 2a of the ball pivot 2 and rocking motions of the ball pivot 2 relative to the housing 1 are compensated for by the sealing cuff 7 . the general representation in fig1 shows that the positive - locking connection can be achieved by both the ball pivot 2 , in the area of the inner end of its conical shaft 5 , and the inner cross section of the edge profile 9 of the sealing cuff 7 having a polygonal cross section . the inner cross section of the edge profile 9 is undersized relative to the outer cross section of the conical shaft part 5 , so that the edge profile 9 is pushed over the polygonal cross section part of the shaft part 5 widened area . a retaining ring 10 , e . g ., a spring ring , can additionally surround the edge profile 9 from the outside and thus provide for firm seating of the edge profile 9 on the shaft part 5 . with a support surface 11 on a circumferential lip of the edge profile , the latter is supported against the component 6 , to which the ball pivot 2 is fastened . in deviation from fig1 fig2 shows an embodiment in which the edge profile 9 of the sealing cuff 7 is connected , e . g ., by vulcanization , to a support ring 12 which is profiled corresponding to a polygonal cross section of the shaft part 5 and is undersized compared with the polygon of the shaft part 5 , so that it widens while undergoing elastic deformation when pressed onto this polygon . a retaining ring 10 is additionally able to support the firm seating of the support ring 12 made of sheet metal or the like , which [ support ring ] is fastened by vulcanization , in this case as well . fig3 shows a positive - locking connection between the edge profile 9 on the shaft part 5 of the ball pivot 2 with a fluted or knurled area 13 on the circumference of the shaft part 5 of the ball pivot 2 . into the depressions of the area 13 the material of the undersized edge profile 9 of the sealing cuff 7 penetrates . this also brings about positive - locking , firm connection between the edge profile 9 of the sealing cuff 7 and the shaft part 5 of the ball pivot 2 . this firm connection can be supported by embedding a retaining ring 14 in the material of the edge profile 9 of the sealing cuff 7 instead of an outer circumferential retaining ring 10 . the design of this positive - locking connection between the edge profile 9 of the sealing cuff 7 and a fluted area 13 provided at the inner end of the shaft part 5 of the ball pivot 2 is illustrated in fig3 a on an enlarged scale compared with the scale of fig3 . fig4 shows an embodiment in which the inner end of the shaft part of the ball pivot 2 is provided on its circumference with flattened zones 15 , chamfered zones or the like , so that a polygon , with which the undersized edge profile 9 of the sealing cuff 7 comes into contact while undergoing elastic deformation , is formed in the area of the fastening of the edge profile 9 of the sealing cuff 7 . also , in this embodiment , the positive - locking connection between the edge profile 9 and the shaft part 5 can be supported by a retaining ring 14 embedded in the material of the edge profile 9 or , if desired , also by an outer circumferential retaining ring 10 , as is shown in fig1 and 2 . fig4 a shows the cross section of the inner end of the shaft part 5 in the area of the flattened zones 15 . in the embodiment shown in fig5 annular grooves 16 , a helix or the like , are provided on the inner end of the shaft part 5 , so that the elastic material of the undersized edge profile 9 penetrates into the grooves or furrows in order to produce the positive - locking connection between the edge profile 9 and the shaft part 5 . the retaining ring 14 embedded in the material of the edge profile 9 ensures sufficient radial forces for the stability of the positive - locking connection . the retaining rings 10 and 14 described may also be replaced with other , known strap retainers . the positive - locking connection between the edge profile 9 and the inner end of the shaft part 5 can also be improved by introducing adhesives 20 between the edge profile 9 and the shaft part 5 or it may consist exclusively of such an adhesive connection . while specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention , it will be understood that the invention may be embodied otherwise without departing from such principles .