Rotatable cutting bit

B - Operations – Transporting – 23 – Q

Patent

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29/44

B23Q 3/00 (2006.01) E21B 10/56 (2006.01) E21C 35/183 (2006.01) E21C 35/18 (2006.01)

Patent

CA 1221820

ABSTRACT A rotatable cutting insert of the type having a shank depending from a head portion and having a hard insert mounted therein, includes an improved insert having a conically shaped tip section, a base section and an intermediate section with the maximum diameter of the tip section smaller than the diameter of the base section.

453079

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