The system (1) has a milling cutter (2) that is arranged with circumferentially acting milling cutting edges (6). The cutting edges are arranged with a set of ends axially cooperating on a longitudinal axis (7). A longitudinal slot (12) is arranged with a set of slides (5). The set of slides is movable along a guide path that lies in a guidance plane between two end stops. The slides are allowed to receive the milling cutter transverse to the longitudinal axis such that the milling cutter is able to rotate freely around the longitudinal axis.
