Hamdani, Doni, Irzal Irzal, Nofri Helmi, and Rifelino Rifelino. “Effect of Cutting Condition on the Surface Roughness Level of ST 42 Steel in Conventional Lathe Processes”. MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 2, no. 3 (September 1, 2020): 11-20. Accessed May 6, 2026. http://motivection.imeirs.org/index.php/motivection/article/view/64.