Rock drill with hard metal drilling head

Details Rock drill with hard metal drilling head Rock drill with hard metal drilling head

E - Fixed Constructions

21

B

255/71

E21B 10/00 (2006.01)

Patent

CA 1095890

ABSTRACT A rock drill for rotary blow drilling with a drilling head arrang- ed at the free end of the drill shaft, which at least partially consists of hard metal. The drilling head, the end face of which is of circular disc or ring shape, comprises a formed piece of solid hard metal. Cutting bodies machined out of the end face of this piece of hard metal have the shape of pyramids or truncated pyramids and taper with increasing distance from the drill shank.

320831

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