Abstract In the work, the Mathematical model and the results of the experimental researches performed, are shown, in order to establish the partial and global tool cutting capacities. They enable the most adequate tools to be chosen, according to the imposed requirements. At the same time, the best cutting conditions can be chosen depending on the concrete priority requirements, so that both the reasonable tool exploitation and respectively, the attaining of best figures of the imposed parameters and technical-economical indices could be assured. Finally, some results of the experimentally performed researches are presented, in the case of cutting: with metallic carbide tips armed turning tools, with twist drills, having different forms of the active part, and with metallic carbide plates armed and milling cutters. The results obtained, emphasize new methods and ways to increase the tool cutting capacity.