Akhmadi, A.N., Usman, M.K. and Sanjaya, F.L. 2024. A Effect of Rotation Speed and Feed on the Surface of ST 41 Steel on a Lathe Machine. IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA). 3, 3 (Dec. 2024), 31–41. DOI:https://doi.org/10.56862/irajtma.v3i3.157.