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All Journal Infotekmesin Jurnal Masyarakat Indonesia IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Andre Budhi Hendrawan
Universitas Harkat Negeri
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pendampingan Dasar Autodesk Inventor dan 3D Printing Untuk Penguatan Keterampilan Siswa Kelas XI Teknik Kendaraan Ringan SMK Muhammadiyah Larangan Brebes Sigit Setijo Budi; Andre Budhi Hendrawan
Jurnal Masyarakat Indonesia (Jumas) Vol. 4 No. 03 (2025): Jurnal Masyarakat Indonesia (Jumas)
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jumas.v4i03.344

Abstract

Digital technology-based design and fabrication skills are essential for Vocational High School students, particularly in the Light Vehicle Engineering competency. Initial identification results indicate that 11th-grade students of Muhammadiyah Larangan Brebes Vocational High School do not yet have adequate experience in three-dimensional modeling and the use of 3D printing technology. This community service activity aims to provide basic assistance in the use of Autodesk Inventor and 3D printing as an effort to strengthen students' technical skills. The implementation of the activity is carried out through the delivery of introductory material, simple component modeling practice using Autodesk Inventor, an introduction to the working principles and materials of 3D printing, and assistance in the printing process of designed objects. Evaluation is carried out by comparing students' initial and final abilities and observing practical skills during the activity. The results of the activity show an increase in students' understanding of 3D design concepts, the ability to create simple component models, and basic knowledge of the three-dimensional printing process. This activity has a positive impact on improving student competencies and can support the readiness of vocational high school graduates in facing developments in manufacturing technology.
Komparasi Paduan Ethanol dan Dietyl Ether (DEE) pada Gasoline Terhadap Performa Spark Ignition (SI) Engine Firman Lukman Sanjaya; Faqih Fatkhurrozak; Nur Aidi Ariyanto; Sigit Setijo Budi; Andre Budhi Hendrawan; Syarifudin
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.3105

Abstract

The limited availability of fossil fuels and the growing demand for energy have led to a global energy crisis. Ethanol and DEE can be used as alternative energy to replace fossil fuels. Ethanol and DEE have high RON and oxygen content, as well as low viscosity, which accelerates the flame, thereby increasing torque and SI engine power. DEE is still rarely used as a gasoline blend, but its chemical characteristics can improve engine combustion. This study aims to compare the use of gasoline-ethanol and gasoline-DEE blends on SI engine performance. The test results prove that the DEE15 blend produces the highest torque value of 4.37 N.m or an increase of 28% compared to pure gasoline. The E15 blend produces the highest SI engine torque value of 4.31 N.m or an increase of 26% compared to pure gasoline. In addition, SI engine power increases by 28% in DEE15 and 26% in E15 compared to pure gasoline. From these test results, the use of a gasoline-DEE blend can improve SI engine performance better than gasoline-ethanol.
Karakterisasi Metalurgi Camshaft Non-OEM Menggunakan Uji Komposisi Kimia dan Kekerasan Surface Hardening Sigit Setijo Budi; Andre Budhi Hendrawan
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 Faqih Fatkhurrozak Firman Lukman Sanjaya Nur Aidi Ariyanto Sigit Setijo Budi Syarifudin