CUTTER INSERT Russian patent published in 1998 - IPC

FIELD: mechanical engineering, in particular, interchangeable inserts for cutting hard metals. SUBSTANCE: insert has upper, lower, and side surfaces, as well as cutting edges defined by intersecting upper and side surfaces. Upper surface has central part disposed in parallel with lower surface and inclined surfaces joined with lower surface and adjoining to cutting edges. Cutting edges are arranged in pairs joined at insert corners disposed in common diagonal of insert. Cutting edges of each pair and adjacent inclined surfaces are arranged at an angle to lower surface of insert in the direction of their common corner. Insert is made in the form of prismatic rhomb with four cutting edges, each making main cutting edge when insert is rotated in cutter receptacle. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 6 cl, 7 dwg