This paper deals with the benefits of PVD coatings applied to HSS three edges end milling cutter. Three types of PVD coatings ((Al,Ti)N, (Al,Ti,Cr)N and nanocomposite nACo) were used to extend the tool life. The coatings were synthesized by a cathodic-arc deposition process. Machining was carried out on the vertical milling machine FB 32V without using process liquid. Set up cutting conditions were constant throughout the machining and tool steel called as Stabil steel DIN 90MnCrV8 (W. Nr. 1.2842) was used as workpiece material. The aim of this experiment was to compare coated and uncoated HSS milling cutters and find out the benefits of PVD coatings during groove milling. The monitored parameters were force loading measured by piezoeletrical dynamometer Kistler 9257B and flank wear measured by tool microscope Alicona.