Abstract: A cutter plate (20) for a milling tool (10), has a top surface (26) with fastening hole and a bottom surface (28) with a thread cutting profile. Between these two faces (24, 26) and at a side surface (28), a cutting edge (32) is formed which is adjoined in the top surface (24) by a chip guide groove (34) with chip outlet edge (36). The cutting edge (32) and the chip outlet edge (36) are disposed on helicoidal paths (38, 40) which diverge in top view. Tooth edges (42) on the side surface form angles (b) with the top surface (24). The cutter plate (20) can be installed obliquely to the tool axis, for example the shaft of the tool in order to achieve a soft first cut, which has a higher degree of quiet running, longer tool life, and a lower cutting pressure of the tool and to effect higher stability of the tool, in particular with small shaft diameters.

Abstract: A cutting tool having a cutting plate with at least one blade and a central axial hole through which a head screw can be used to connect the cutting plate to a holder having an axial bore through its center for receiving the screw and a recess around the bore for receiving a complimentary projection located around the central hole of the cutting plate which is longer than the recess is deep. Alternate embodiments are provided in which the projection is located on the holder and the recess in the face of the cutting plate. In all embodiments, the recess and projection have contacting surfaces which substantially eliminate axial forces on the head screw.