The article presents results of engineering research carried out for the purpose of hard-alloy cutters testing and commissioning. The end grooves of these components were machined with hard-alloy cutters at the "Energia " Corporation. The calculations and analysis showed that the cutters are functional, cutting is fulfilled without chattering. The machined surface quality meets the requirements. There were no cutter breakages registered during manufacturing testing. In spite of this fact there are some breakages under the workshop conditions. This points out to the necessity of strength calculation to be carried out. Cutting part stress condition has great tension stress. The limit value of certain nodes tension is approximate to hard-alloy strength. It is necessary to increase the cutter face angle or to apply high strength hard-alloy for cutter making. According to the research we developed technological recommendations and grooving carbide cutters were implemented in the production of parts of space hardware.