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All Journal Infotekmesin IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Setijo Budi, Sigit
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Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Karakteristik Material Camshaft AISI 8620 dan Besi Cor Kelabu menggunakan Metode Metalografi dan Spektrometri Optik Setijo Budi, Sigit; Hendrawan, Andre Budhi; Akhmadi, Amin Nur; Nashrudin, Hafidz
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.261

Abstract

The demand for non-OEM camshafts is increasing, but this raises concerns about material quality. This study analyses the material characteristics of AISI 8620 and grey cast iron camshafts used in 125cc automatic motorcycles. Testing was conducted using Metallography and Optical Emission Spectrometry. AISI 8620 exhibits a fine ferrite-pearlite microstructure and alloying elements such as chromium and molybdenum, which support heat treatment. Cast iron exhibits a pearlite structure with flake graphite, providing superior damping but less toughness. The results indicate that AISI 8620 is more suitable for high-load applications, while cast iron is suitable for lightweight and cost-effective applications. This study provides important insights into material selection for motorcycle camshaft manufacturing.
Analisis Tegangan City Electric Car Torsi Beam Suspension Menggunakan Metode Finite Element Model (FEM) Setijo Budi, Sigit; Suprihadi, Agus; Syarifudin, Syarifudin
Infotekmesin Vol 12 No 1 (2021): Infotekmesin: Januari 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i1.463

Abstract

The torsion beam is one of the most important parts of an electric car. The torsion beam can accept the loading of vehicle structures statically and dynamically. The movement of the vehicle, such as turning, turning with a bumpy road contour, affects the stress limit that the torsion beam can support. This study aims to simulate the effects of shifts such as deflection and stress on the use of a torsion beam suspension. The method used is a loading simulation using the Finite Element Model (FEM) model. The results showed that the maximum deflection effect occurred in the 2000N loading of 1.5347 mm, while the maximum stress effect occurred in the 2000N loading of 2342.57N.
Karakterisasi Metalurgi Camshaft Non-OEM Menggunakan Uji Komposisi Kimia dan Kekerasan Surface Hardening Setijo Budi, Sigit; Hendrawan, Andre Budhi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.366

Abstract

This study aims to evaluate the metallurgical characteristics of Non-OEM camshafts through chemical composition analysis and surface hardness testing, and to compare them with a reference camshaft manufactured from VCN150 steel. All samples were tested in the as-received condition to represent actual manufacturing quality in the market. Chemical composition was analyzed using Optical Emission Spectroscopy (OES), while surface hardness distribution was measured using the Rockwell C method in accordance with ASTM E18. The results show that the Non-OEM A camshaft exhibits the highest surface hardness (≈60–61 HRC) with a steep decrease toward the core, whereas the Non-OEM B camshaft reaches approximately 56–57 HRC with a more uniform hardness profile. The reference camshaft demonstrates a surface hardness of about 60 HRC with a gradual decrease toward the core. Variations in carbon and alloying elements contribute to differences in hardening response. These findings indicate variable material quality among Non-OEM camshafts compared with industrial-grade materials.
Co-Authors Amin Nur Akhmadi, Amin Nur Hendrawan, Andre Budhi Nashrudin, Hafidz Raden Mohamad Herdian Bhakti Syarifudin Syarifudin