A blunt cutting device has a rotary drum, on the drum and the cutting bit holder mounted in corresponding bores of each holder for a rotation relative to this are attached. Each of the cutting bit has a shank with a pocket, which is formed in a front end of the same, and in which the the cutting bit is fixed by brazing, wherein an outer lip of the shaft is firmly an outer side surface of the cutting chisel with a heat shrinkage seat grips. The the cutting bit has a circular cutting edge which, by the section between sections of the front surface and the side surface of the cutting chisel is formed, surface section at an angle of 90 deg cutting. The front surface of the cutting chisel has raised radial ribs on the circumference by the same in the distance are arranged in order to a rotation of the cutting chisel during the cutting operation to induce.
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