CUTTER Russian patent published in 2001 - IPC

FIELD: metal working, namely boring holes in bodies and parts of machines and instruments. SUBSTANCE: cutter includes body in the form of cylindrical rod and helical cuttings chute. In order to enhance cuttings removal out of cutting zone at boring holes, front surface of cutter in its end cross section is restricted by circle arc and it passes to helical cuttings chute of the same profile in body of cutter along distance no more than its three diameters. EFFECT: enhanced quality of cutting, increased useful life period of cutter, reduced cost of regrinding cutter. 5 dwg, 1 tbl