Specialized stainless 09Kh17N7Yu steel becomes more usable in various fields of mechanical engineering due to its unique properties, but recommendations for parameters of the cutting mode and for rational tool materials are out of date. Due to this, excessive consumption of tool materials is observed. It is necessary to develop new recommendations with adaptation to high-performance processing on CNC machines. The recommendations of foreign tool manufacturers are insolvent for choosing their tool, because there are no direct foreign analogues of this steel. Researches are carried out to reduce the consumption of hard tool alloys of VK, ТК and ТТК groups, as well as number of foreign tool materials. The possibility of using VК8 alloy with coatings for turning by removable standard hard alloy plates is established. Rational coatings are chosen from the number of known coatings. New coatings are developed for specified operating conditions

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Studies have been carried out to reduce the consumption of the ВК8 grade tool hard alloy due to the use of new coatings. The possibility of using such a tool for turning with replaceable standard carbide plates has been established. Rational coatings are selected from among the known coatings. New coatings have been developed for the specified operating conditions.