This paper compares the cutting process characteristics depending on the extent of the tool flank wear. The research was executed with Finite Element Method analysis. The researched cutting process was hard turning, when case hardened steel 16MnCr5, 62±2 HRC was cut by a cubic boron nitride tool insert (CBN). The examined data were the main cutting force, the passive force, the cutting temperature and the chip segmentation morphology.
