Abstract
It is possible to assume physical properties or stress-strain characteristics of material as a basis of diagnostics of a machine tool system state on the basis of which to forecast a level of engineering process updating for product blank machining and to optimize tool parameters and other equipment components ensuring efficient machining processes economically and technically. 
 The purpose of the work: according to the measurement results of the mass of replaceable hard-alloy cutting plates of a metal-cutting tool to draw a conclusion of their operational capability under those or other operational conditions at a standard engineering enterprise. There are considered standard designs of cutting and chip breaking plates. The mass measurements of more than 250 plates are carried out. The procedure for the plate selection according to quality is developed. The results obtained are tabulated and illustrated. A share ratio of suitable and scrap plates is shown. There are formulated recommendations regarding suitable plates use depending on their quality grade.
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