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The shaping process of surface texture is complicated and depends on many factors and phenomena accompanying them. This article presents the author's test stand for the measurement of relative displacements in a tool-workpiece system during longitudinal turning. The aim of this study was to determine the influence of edge radius on the relative displacement between the tool and workpiece. The cutting process was carried out with inserts with different edge radii for X37CrMoV5-1 steel. As a result of the research, vibration charts of the tool-workpiece system were obtained. In the range of feed 0.03-0.18 mm/rev, the values of the standard deviation of relative displacements in the x -axis were obtained in the range of 0.36-0.78 μm for the insert with an edge radius of r n  = 48.8 μm. As a result of the work, it was determined that for the feed value of 0.12 mm/rev for all inserts, the relative displacements are the smallest. As the final effect, the formula for forecasting the Ra roughness parameter was presented.

Influence of Relative Displacement on Surface Roughness in Longitudinal Turning of X37CrMoV5-1 Steel