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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Simulation results of the Ra surface roughness parameter (a) for the variable cutting speed vc and feed per tooth fz, and (b) for the variable cutting speed vc and axial depth of cut ap.