Patent ID: 6742610
Filing Date: 2004-06-01
Classification: B23B,E21B

Abstract:
A rock drill for hand-guided rotary hammers, percussion drilling machines or rotary drilling machines, comprising:a drill head having at least one locating slot, a carbide insert, and a supporting region of the carbide insert; a single- or multi-start conveying helix having a flute and adjoining the drill head; and a clamping shank adjoining the conveying helix, wherein the carbide insert extends at least in a direction transversely across the drill head and is embedded in the at least one locating slot, the drill head has a support for the carbide insert in a region of the embedding of the carbide insert, the conveying helix extends into the supporting region of the carbide insert, and a core thickness of the conveying helix flute increases toward the drill head, and wherein the conveying helix is continued into a region of surface sections of the drill head, the surface sections being provided in the region of the embedding of the carbide insert; and further comprising a disposal flute, wherein a decrease in depth of the disposal flute is effected continuously before and in the region of surface sections of the drill head, a core thickness of the conveying helix increasing continuously toward the drill head.