device for senkrechtbohren with rotary drill string and hydraulic or pneumatic raising of bohrkleines

摘要

in a device for senkrechtbohren with rotary drill string and hydraulic or pneumatic raising of bohrkleines by at least one suction pipe, the mouth of the bohrachse arranged concentrically arranged tools, for example on inclined axes rotating cutter of a it is boring is arranged erfindungsgemu00e4u00df the head with a keilkranz errorthe flanks converge forward and outside the tools are occupied, with the mouth of the ansaugrohres in keilflanken) is arranged.