of the cutting plate seat however this offset is shown clearly oversized here furthermore with its second counter stop side surface 114 running orthogonally to the first the plate 2 impacts against a point located on the second stop side surface 14 of the cutting plate seat and its position is thus determined by the surfaces 5 10 14 in all three coordinate directions it is clear that all replaceable cutting plates 2 for any nominal diameter always have a through hole 8 at a predetermined distance from the two counter stop side surfaces 114 110 this can be seen particularly clearly from fig7 which is explained further below it can also be seen from fig4 that the two stop side surfaces 10 14 are inclined at an angle u03b1 of 80 u00b0 with respect to one another whereas the two counter stop surfaces 110 114 span an angle u03b2 of 90 u00b0 in this case the cutting plate 2 preferably abuts against the stop surface 10 with the entire counter stop side 110 a linear stop would also be feasible as is shown by an inclined stop surface 10 u2032 with a dashed line the angular shaping of the stop ensures that inadequate abutment of the replaceable cutting plate 2 on the cutter carrier the drill head 1 does not occur as a result of tolerance deviations fig5 shows a modification where linear contact of the cutting plate 2.