PT Journal AU Mrkvica, I Adamec, J Hyvnar, T TI Comparison of Drill Cutting Efficiency from Different Tool Materials SO Manufacturing Technology Journal PY 2009 BP 86 VL 9 IS 1 DI 10.21062/ujep/x.2009/a/1213-2489/MT/9/1/86 DE Drilling; Tool Materials; High-speed Steel; Wear of Tool AB Development of cutting tools is basic condition for rationalization of process cutting because it goes out from need of processing new constructional materials. From view of tool it takes application progressive cutting materials. Cutting tools so relevantly make for accomplishment main demand on methods of cutting; it is provision of high productivity production and attainment of desideration of finish surface. It is known, that cutting property of cutting tool is influence by many factors. ER