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Journal : IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)

Paralelisme Konsumsi Bahan Bakar Pertalite Dengan Bahan Bakar Gas LPG 3 Kg Pada Mesin Bensin Pompa Air Starke Gwp50 Akhmadi, Amin Nur; Usman, Mukhamad Khumaidi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.83

Abstract

A fuel is a compound that contains hydrocarbon elements. Pertalite is a fuel quality that has an Octane Research Number 90. LPG is made from petroleum gas material formed from Propane and Butane. The water pump drive engine is a pertalite-fueled internal combustion motor but may replace with LPG. The main reason is the cheap purchase price. Using LPG gas as a substitute for pertalite fuel is interesting research that will be conducted to conduct experiments testing pertalite fuel consumption with LPG gas. The results obtained in this study, namely using rice field water pumps with LPG gas fuel, resulted in lower consumption than pertalite fuel by 32% when without load and 28% when with the load.
Pengaruh Kecepatan Putaran dan Pemakanan terhadap Permukaan Baja ST 41 pada Mesin Bubut Akhmadi, Amin Nur; Usman, Mukhamad Khumaidi; Sanjaya, Firman Lukman
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i3.157

Abstract

This study discusses the effect of feed rate and machine rotation speed on the surface roughness of ST 41 steel in the flat turning process. The aim is to determine the relationship between variations in rotation speed (100 rpm, 300 rpm, and 500 rpm) and feed rate on the final surface results of the workpiece. The method involves cutting tests on ST 41 steel specimens with a diameter of 25 mm and a length of 400 mm with various rotation speed variations. The results show that at low rotation speed (100 rpm), the surface of the workpiece tends to be rough. The surface becomes better at medium speed (300 rpm), while at high speed (500 rpm), the surface results are smoother. These findings indicate that increasing rotation speed contributes to a decrease in surface roughness. Thus, higher rotation speeds can improve the quality of turning results.