B - Operations – Transporting – 26 – F
Patent
B - Operations, Transporting
26
F
B26F 1/32 (2006.01)
Patent
CA 2140327
A tool for cutting round holes in thin, soft or friable materials. In this invention, a tube with an open wall section and with a sharpened end such that the outer diameter is the cutting edge, is held against the material surface and rotated to cut circumferentially into the subject material to produce a round hole. The tool may be operated by manual rotation or by powered means. The cutting action of this tool does not cause surface splintering, tearing or splitting in soft or friable materials. The tool may include an additional internal cutter to provide the desired base surface in blind holes.
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