rotary tool chip removal comprising - a plate of trapezoidal section (1) having an upper face (10) and a lower face (11) and comprising - a first side of the trapezium (3a) with a first free surface (4a) and an active cutting edge (5a), - a second side of the trapezoid (3b) with a diametrically opposite the active cutting edge (5a) inactive edge (5b), and a second surface (4b), and - a base of the trapezium (2) provided with a guide recess (18) adjacent the underside (11) line, and - a tool body (22), which - in order to receive the cutting insert (1 ) comprises a seat for the insert (27) having a guide bar (29) corresponding to the guide recess (18) and located along one edge of base (31) of the seat for the insert (27) , parallel to the trapezium base line (2).
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