ROTATING CUTTING TOOL Russian patent published in 2007 - IPC B23B51/00 B23C5/16 B23D77/00 

FIELD: built-up cutting tool, reamers having changeable parts.

SUBSTANCE: in order to provide feed of cutting fluid to cutting edges of tool the last has cutting part, screw member and stem. Cutting part includes body and arranged behind it cone portion, through axial hole, large number of closing protrusions arranged in its lateral surface along axis and extending along radius inside closing protrusions. Each closing protrusion has inclined closing surface; axially arranged step extending from said protrusion and having stop surface turned in tangential direction. Screw member has at side of its leading end, large number of clamping protrusions arranged along axis and extending radially outside and outer thread behind said clamping protrusions. Each clamping protrusion has inclined surface and lateral bearing surface. Stem of tool has mounting opening with front cone portion and internal-thread portion. Outer thread of screw member engages with inner threaded portion of stem. Cone portion of cutting part is arranged inside cone portion of tool stem. Clamping and closing protrusions are arranged in pairs; closing and clamping surfaces of each pair are mutually engaged and each stop surface engages with each lateral bearing surface of each pair.

EFFECT: improved design of tool providing its simplified manufacture.

14 cl, 14 dwg