Patent ID: 7575074

Claim:
A separate drilling head ( 1 ) for being forcelockingly secured in a thin-walled hollow anchor tube ( 3 ), the drilling head ( 1 ) comprising: a distal end; a proximal end; a longitudinal axis (A); a conical member at the proximal end and forming a circumferentially closed outer cone ( 5 ); hard metal cutter means ( 2 ) at the distal end; and an axial stop shoulder ( 4 ) at the proximal end, with the axial stop shoulder ( 4 ) axially oriented to the longitudinal axis (A), and with the axial stop shoulder ( 4 ) connected to the circumferentially closed, outer cone ( 5 ), wherein the hard metal cutter means ( 2 ) comprises at least one thin hard metal plate ( 6 ), and the drilling head ( 1 ) has a slot ( 7 ) with a slot width (X) of less than 3 mm and in which the at least one hard metal plate ( 6 ) is secured.