Pengaruh Kecepatan Putaran Spindle dan Feed Rate terhadap Tingkat Kekasaran Permukaan Material AISI 4140 pada Proses Bubut

Sanwily; Yano Hurung Anoi; Rosmiati; Siti Norhidayah

doi:10.52158/jamere.v6i2.1685

Authors

Sanwily Sekolah Tinggi Teknologi Industri Bontang
Yano Hurung Anoi Sekolah Tinggi Teknologi Industri Bontang
Rosmiati Sekolah Tinggi Teknologi Industri Bontang
Siti Norhidayah Balikpapan University

DOI:

https://doi.org/10.52158/jamere.v6i2.1685

Keywords:

Turning, AISI 4140, Spindle Speed, Feed Rate, Surface Roughness.

Abstract

Spindle speed and feed rate are factors that significantly influence the turning process in the manufacturing industry. One of the main indicators of turning quality is surface roughness, as it affects the service life, performance, and reliability of machine components. In machining workshop practice, particularly in the turning of AISI 4140 alloy steel, inconsistent surface quality often occurs due to the determination of cutting parameters that still depend on operator experience and have not been technically standardized. This study aims to analyze the effect of variations in spindle speed and feed rate on the surface roughness of AISI 4140 material in conventional turning processes and to determine the combination of cutting parameters that produce the most optimal surface roughness value. The research method used is a quantitative method with an experimental approach. The turning process was carried out using a TOS TRENCIN SN 71 C lathe with spindle rotation speed variations of 250 RPM, 360 RPM, and 500 RPM, and feed rate variations of 0.09 mm/rev, 0.16 mm/rev, and 0.23 mm/rev. Other cutting parameters were kept constant, namely a cutting depth of 0.5 mm and the use of Sandvik Coromant carbide insert chisels. Surface roughness measurements were carried out using a TIME 3200 surface roughness tester with Ra parameters. ANOVA analysis showed that feed rate was the most dominant parameter affecting surface roughness (p-value 0.02 < 0.05). The best average surface roughness value obtained was 0.945 µm with a roughness class of N6 using a spindle speed of 500 RPM and a feed rate of 0.09 mm/rev.

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