Tool

Details Tool Tool

B - Operations, Transporting

23

B

77/35

B23B 51/02 (2006.01) B23B 51/00 (2006.01)

Patent

CA 1137338

ABSTRACT A tool, particularly a drill bit, with a working part and a shaft integral therewith extending coaxially to the longitudinal axis thereof for fastening in the receiving part of a drilling machine, etc. The longitudinal middle region of the shaft has a part with axis-parallel mantle lines. A conical part is arranged between the working part and the axis-parallel part, with the diameter of the conical part being greater than the diameter of the axis-parallel part, and the taper of the conical part extending in such a manner that that end face of the conical part having the smaller diameter adjoins the axis-parallel part. A conical piece adjoins at that end of the axis-parallel part located across from the conical part, and this conical piece tapers in the direction towards the free end of the shaft, with the greatest diameter of the conical piece equaling the diameter of the axis-parallel part, and the outer taper of the conical piece extending in a common plane with the taper of the conical part.

369567

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