Ferdian, Syahrizal Rafli, Jenni Ria Rajagukguk, and Ajat Zatmika. “Analisis Pengaruh Variasi Kecepatan Spindel Terhadap Kekasaran Permukaan Material Scr420h Hasil Pemesinan CNC Turning Mazak Quick Turn Smart 250”. SENTRI: Jurnal Riset Ilmiah 5, no. 7 (July 30, 2026): 3528–3545. Accessed October 4, 2026. https://ejournal.nusantaraglobal.ac.id/index.php/sentri/article/view/6974.