Cutter head for cutting materials, and cutter therefor

The invention relates to a cutter (10) comprising a cutting edge (14), a rear (12), a cutting surface (11), a foot (13) and a longitudinal axis (L), as well as a transverse axis (Q), wherein a stop surface (15) is provided on the rear (12) pointing towards the cutting edge (14), said stop surface extending in the direction of the transverse axis (Q) and being provided at an angle (alpha) of between 92 DEG and 112 DEG in relation to the longitudinal axis (L). In addition, the cutter is suitable for use in a cutter head comprising a carrier body (1), in which at least one radially outwardly open recess (2) is provided for receiving a cutter (10) and a clamping jaw (4) which can be actuated by a clamping screw (3), and by means of which the cutter (10) can be clamped in a fixed position in the recess (2), wherein the recess (2) has a stop (5) with a stop surface that is directed radially inwards, and the cutter (10) can be introduced into the recess (2) against the force of at least one elastic element (20, 23,