One-piece rotary material removing tool of sintered hard metal

Details One-piece rotary material removing tool of sintered hard metal One-piece rotary material removing tool of sintered hard metal

B - Operations, Transporting

23

B

29/34, 77/35

B23B 51/06 (2006.01)

Patent

CA 1298495

ABSTRACT A one-piece rotary drill or end milling cutter is an extruded product made of sintered hard metal. The front end portion of its shank has one or more cutting edges and its rear end portion tapers in a direction away from the front end portion and is receivable with friction in a complementary conical socket of a rotary holder. The shank has one or more longitudinally extending coolant holes with a circular or triangular cross-sectional outline, and such hole or holes are formed in the course of the extruding step. The peripheral surface of the shank has one or more longitudinally extending chip evacuating grooves, and those portions of the grooves which are formed in the rear end portion of the shank contain fillers of bondable plastic material or solder. - 1 -

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