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Effect of the Working Diameter to the Surface Quality in Free-Form Surface Milling

The article presents the changing of the working diameter (effective diameter) and its effect to the surface roughness based on milling experiments of a test part in 3D milling of free-form surfaces. The position of the surface and the step depth determine the effective diameter, in case of constant revolution of the tool, the actual cutting speed and the minimal removable chip thickness will change. The article presents the result of the application of the constant cutting speed and feed per tooth.