A current control system includes a first switch, a second switch, and a controller. The end piece 14, which is ideally embodied as a retaining claw, holds the inner ring and the roller body 10 together, but can be removed after or during the assembly by means of a predetermined rupture point 15, in order to make room for a further component, such as for example a sealing arrangement. The one component has a connection sleeve screwed thereon.