Set of cutters for a canter head

A cutting tool adapted to deliver a peripheral cut at a constant radial distance, said cutting tool comprising a multi stage canter head (20), said canter head comprising a knife holder (22), a counter knife (30) mounted on said knife holder, said counter knife having a dorsal support (37), a cutting knife (50) mounted on said dorsal support and having a cutting edge (53), said cutting knife further having a pair of adjustment recesses (52) adapted to sustain means of adjustment device (58);

• said cutting knife further comprising a long face (51), a sharp cutting face (54), a short angularly oriented finishing face (57) and a curved face (56) laid out between said sharp cutting face (54) and said finishing face (57);
• said counter knife (30) also comprising an angularly orientated face (57′), a long face (51′) and an elbow (39), between said long face (51′) and said angularly oriented face (57′), said elbow (39) fitting said curved face (56), said elbow comprising an elbow slot (33),
• said cutting tool comprising means of clamping (48) said cutting knife onto said counter knife, said means of clamping (48) comprising an angled part (49) and a curved surface (47) installed over said elbow slot (33) onto said elbow in combination with a tightening screw (45) tightening said angled part,
• said angled part (49) comprising outside edges (59) tightened against said long face (51) and said finishing face (57),
• the tightening by said tightening screw (45) against said long face (51) and said finishing face (57) causing a spread of said outside edges and a firm holding of said knife,
• said means of clamping exerting a push against three elements namely two planes (51, 57), by the spreading of said outside edges (59), and a surface of an inner seat (41) against said curved surface (47), thereby forcing a cooperation of said three elements.