Ball draw-off apparatus for shaft prostheses

The invention relates to a ball draw-off apparatus for shaft prostheses with balls which can be placed onto the prosthesis neck. The invention relates to a ball draw-off apparatus for shaft prostheses with balls () which can be placed onto the prosthesis neck (). The apparatus has two rotary bodies (5a, ) which are rotatably supported in a housing (), which can in each case be rotated with a lever arm () and which with their axes of rotation () lie in a common plane and form an open gap S in the projection onto the plane F for the introduction of the prosthesis neck (). The rotary bodies have a profile which with increasing rotation decreases the gap S for clamping the prosthesis neck () and causes an increase of the distance of its upper edge () from the plane F in order to produce a draw-off force P at the placed on ball directly or indirectly via an intermediate body.