This work is based on the analysis of vibrations generated during the classical shooting. The main objective is to improve the surveillance of the cutting device usury during its three phases of life. This analysis aims to demonstrate if there is a relation between the evolution of the usury and the measured length(vibrations)during the machining. To succeed , we have made many great campaigns by using tools in platelet and the monobloc in metallic carbureted engine. Thus, generated vibrations during the machining operations have been registered, following two axes on the machine tool thanks to the mono axial accelerometer situated on the turret. The first is oriented following the vertical direction x (radial), the second following z(axial) and parallel to cut effort. These directions have been qualified of privileged directions . however signals have been treated via two methods ; temporal method based on statistic indicators (RMS, kurtosis, skewness, variance, variance, average) and frequential method. Furthermore,, we’ll measure the electrical power and we have visualized and measured the width of the usury thanks to an optic microscope. Finally, the proposed methods in this work have permitted to determine the vibrating level of the signal and pertinent indicators permitting a surveillance of the tool usury of the classical turning cut.