Along with the increase in the use of stainless steels in the world, the application of new processing technologies and instruments, as well as the development of materials and coatings of cutting tools, the research and prediction of the distribution of wear and temperature fields has become relevant. It is important to study the modes of the processing process and their effect on the result. Since stainless steel itself is a strong and difficult-to-process material and contains several alloying elements, which in turn complicate processing and cause significant inconvenience in the chipping process (chips must be broken, sharpened) because these alloying elements increase the plasticity and hardness of the steel, which in turn creates difficulties for processing by cutting. As a result, we get flowing chips, which is not acceptable in modern automated production of large series of parts, so it can be concluded that the study of the chip formation process is very relevant. One of the problems is that tools from different manufacturers for the same material group will give different quality of the turned surface. In the turning process, the influence of factors such as the structure of different workpiece materials can lead to an invalid machining result. In this case, AISI 304 and AISI 420 stainless steels with martensite and austenite structure were compared. For the first time, the wear-resistant nanocoating with Duratomic technology has been studied at increased cutting speeds and other variable machining regimes that normally affect the machining result. This coating is characterized by higher wear resistance