| 摘要 |
A drilling head, with a cross-sectional dimension (E) in a direction normal to the drilling axis (A), includes two diametrically opposite, free-standing, prong-shaped support members ( 2 ) provided at a head-side of the drilling head, and a diametrically extending hard material element ( 3 ) connected with the two support members ( 2 ) and which forms at least one cutter ( 4 ) at its head, in an axial direction, side and which lies freely in a central region (Z) of the drilling axis (A) at a stem, in the axial direction, side of the drilling head ( 1 ).
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