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The questions considering cutting treatment of the shaped details with chromium-nickel coatings by lathe instruments, equipped polycrystalline ultra hard materials on the basis of cubic boron nitride of the coniferous forest. The features of technologies of lathe treatment of details are rotined with coverages at the improvement of structural descriptions of cutting plate, technological parameters of process of cutting and coverages on an instrument. It is set that application of sheeting allows to promote firmness of polycrystalline instruments on the stage of earning extra money due to diminishing of adhesive contact between the processed and instrumental materials.