Rotatable cutting bit

E - Fixed Constructions – 21 – C

Patent

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Details

94/50, 255/72, 2

E21C 35/18 (2006.01) E21B 10/56 (2006.01) E21C 35/183 (2006.01)

Patent

CA 1285266

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.

604471

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