Analisis Coolant Dromus Beserta Variasi Coolant dari Minyak Kelapa dan Jagung terhadap Kekasaran Permukaan Material Baja ST-60 pada Pembubutan Konvensional

Rony Irawan
Nurhadi Nurhadi
Fendy Kussuma

Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer
Vol. 3 No. 3 (2025): Juni : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer

Product quality is affected by the conventional turning process that requires coolant to maintain surface smoothness and reduce tool wear. Vegetable oils such as coconut, corn, and palm oil are environmentally friendly alternatives to chemical coolants (dromus). This study tested the effect of vegetable coolants on the surface of ST 60 steel using an experimental method with variations in a mixture of oil, water, and liquid soap. Turning was carried out at a depth of 0.5 mm, a rotation speed of 1035 rpm, and a cutting speed of 65 mm/min. The results showed that the lowest roughness was in variation 7 (80% corn oil + 10% water + 10% liquid soap) with an initial roughness value of 2.438