A core bit having a spiral shank shaped drill shank, and a method for manufacturing a spiral shank shaped drill shank to a core bit

摘要

The present invention relates to a drill core (23) having a core diameter (d ₁ ) and a core bit (10) for manufacturing a drill hole (24) having a drill hole diameter (d ₂ ) in a workpiece (22). To release or release the cutting portion 11 having the above-described cutting segment 15, the drill shank portion 12 having the tubular drill shank 16, and the cutting portion 11 and the drill shank portion 12. It has a connecting device 13 which connects to one another inadvertently, wherein the tubular drill shank 16 is configured as a welded spiral tube.