Drilling head

Abstract

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 ).

1 . A drilling head having a drilling axis (A) and a cross-sectional dimension (E) in a direction normal to the drilling axis (A), the drilling head comprising, at a head side thereof, two diametrically opposite, free-standing, prong-shaped support members ( 2 ); and a diametrically extending hard material element ( 3 ) connected with the two support members ( 2 ), forming at least one cutter ( 4 ) at a head, in an axial direction, side thereof, and lying freely in a central region (Z) of the drilling axis (A) at a stem, in the axial direction, side thereof.  
   
   
       2 . A drilling head according to  claim 1 , comprising at a bottom formed between the two support members ( 2 ) at the head, in the axial direction, side of the drilling head, an opening ( 5 ) of a rinsing bore ( 6 ) coaxial with the drilling axis (A).  
   
   
       3 . A drilling head according to  claim 1 , wherein a diametrical free space (F) between the two support members ( 2 ) amounts to at least a fifth of the cross-sectional dimension (E).  
   
   
       4 . A drilling head according to  claim 1 , wherein the hard material element ( 3 ) is connected with the support members ( 2 ) in a material-locking manner.  
   
   
       5 . A drilling head according to  claim 1 , wherein the hard material element ( 3 ) is formed as a thin hard material plate having a thickness (D) less than a tenth of the cross-sectional dimension (E).  
   
   
       6 . A drilling head according to  claim 1 , wherein the hard material element ( 3 ) has a reduction of thickness (D) in a radial region (R) of the drilling axis (A).