Patent ID: 6948574

Claim:
A core bit for an abrasive cutting of mineral components, comprising a cylindrical tube ( 3 ) provided at an end surface thereof with one of cutting bodies and abrasive bodies ( 2 ); and a cover ( 4 ) provided at an opposite end surface of the cylindrical tube ( 3 ) and secured thereto and having, along a central axis (A) thereof, a shank ( 5 ) to be received in at least rotary power tool, wherein cover ( 4 ) is dimensioned, with respect to a set excitation frequency, for forming a whole number of maximum amplitude oscillations of a concentric flexural oscillation, wherein the cylindrical tube ( 3 ) is dimensioned, with respect to said set excitation frequency, for forming a whole number of maximum oscillations of axial longitudinal oscillations, and wherein the cylindrical tube ( 3 ) has, solely in a axial region (X) of axial longitudinal amplitude oscillation nodes ( 10 ), a plurality of elongate recesses ( 11 ) oriented along the central axis (A) and equidistantly arranged over a circumference of the cylindrical tube ( 3 ).