Effect of Cutting Speed on Surface Roughness: Face Milling of Steel with a Parallelogram Insert

In the study, the roughness characteristics of the surfaces produced with symmetrical milling experiments of steel were analyzed. The cutting speed was changed while the chip cross-section remained constant. The tool was equipped with a single insert with κ r =90°. In this article the 2D and 3D roughness characteristics are investigated; the average roughness (R a , S a ) and the profile height parameters (R z , S z ) were taken into account. The roughness measurements were made in five parallel planes, the change in roughness parameters was analyzed in different planes and the inhomogeneity of topography was shown in planes parallel to the direction of feed.