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All Journal Prosiding Semnastek Turbo : Jurnal Program Studi Teknik Mesin JURNAL INTEGRASI Manutech : Jurnal Teknologi Manufaktur JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Journal of Telenursing (JOTING) jurnal syntax admiration Integrated Science Education Journal COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan Jurnal Teknologi Manufaktur dan Industri Jurnal Polimesin
Eko Yudo
Politeknik Manufaktur Negeri Bangka Belitung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Social Sciences Other

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Effect of Heat Treatment and Tempering Process on the Hardness of S55c Steel as A Cutting Blade Material for Plastic Shredding Machines Eko Yudo; Ariyanto Ariyanto; Erwansyah Erwansyah; Zaldy Sirwansyah Suzen; Sugiyarto Sugiyarto; Yuli Dharta; Zulfitriyanto Zulfitriyanto
Integrated Science Education Journal Vol 7 No 1 (2026): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v7.i1.2461

Abstract

Purpose of the study: This study aims to optimize the heat treatment process of S55C medium-carbon steel by examining the combined effects of austenitizing temperature, quenching media, and tempering temperature on impact toughness. Methodology: An experimental approach was employed using quenching and tempering treatments. Quenching was performed at three austenitizing temperatures (950°C, 1000°C, and 1050°C) with three different cooling media—salt water, oil, and seawater—followed by tempering at 100°C, 200°C, 300°C, and 400°C. All heating processes were conducted in an electric furnace. Parameter optimization was carried out using the Taguchi method with an L9 orthogonal array. Mechanical performance was evaluated through Charpy impact testing, and confirmation experiments were conducted to validate the optimal parameter combination. Main Findings: The Taguchi analysis identified the optimal quenching condition at an austenitizing temperature of 1050°C with salt water as the cooling medium, yielding the highest impact toughness. Confirmation tests supported the reliability of this result. Additionally, the tempering process showed that increasing the tempering temperature decreased hardness while significantly improving toughness, indicating effective stress relief and improved ductility in the steel microstructure. Novelty/Originality of this study: The novelty of this study lies in the integrated optimization of quenching temperature and diverse cooling media, including seawater, using the Taguchi method, with a specific focus on toughness rather than hardness alone. This research provides new insights into tailoring heat treatment parameters for S55C steel to achieve superior impact resistance, offering practical guidance for more efficient and application-oriented heat treatment strategies in manufacturing industries.
Cooling Media–Driven Shift in Dominant Machining Mechanisms: A Taguchi-Based Optimization of Surface Roughness in CNC Milling of S45C Steel Fatullah Faing; Eko Yudo; Zaldy Kurniawan
Integrated Science Education Journal Vol 7 No 1 (2026): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v7i1.2643

Abstract

Purpose of the study: Is to optimize the surface roughness in CNC milling of S45C steel using two types of cooling media: Dromus and radiator water. Methodology: This study employed the Taguchi experimental design method to compare cooling media. Three main machining parameters, namely spindle speed, depth of cut, and feed rate, were examined at three levels using a Taguchi L9 orthogonal array. In addition, two different cooling media, namely radiator water and Dromus, were applied to investigate their effects on surface integrity. Surface roughness values ​​were measured using a standard surface roughness tester and analyzed using the Signal-to-Noise (S/N) ratio, with the results supported by Analysis of Variance (ANOVA). Main Findings: The results demonstrate that cooling media play a decisive role not only in reducing surface roughness but also in shifting the dominant machining parameter. Under radiator water cooling, spindle speed was the most influential factor, contributing 45.67% to surface roughness variation. In contrast, when Dromus was applied, depth of cut became the dominant parameter with a contribution of 63.40%. Dromus consistently produced lower surface roughness values and higher S/N ratios, indicating improved thermal control and process stability. The optimal machining condition was identified at a spindle speed of 1910 rpm, a depth of cut of 0.2 mm, and a feed rate of 330 mm/min. Novelty/Originality of this study: The novelty of this study lies in revealing how cooling media fundamentally alter surface formation mechanisms and parameter dominance, offering new insights for adaptive and efficient CNC milling optimization strategies.
Analisis Pengaruh Parameter Pemesinan CNC Milling terhadap Material Removal Rate pada Dudukan Cetakan Kampas Rem Hadi Usman; Eko Yudo; Sukanto Sukanto
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.402

Abstract

This study investigates the influence of CNC Milling parameter variations on the Material Removal Rate (MRR) of S45C steel brake lining mold holders using the Taguchi method. Three parameters—spindle speed, feed rate, and depth of cut—were tested at three levels through an L9 experimental design. Data were analyzed using the signal-to-noise ratio, ANOVA, and normality testing. Results indicate that none of the parameters significantly affect MRR at the 5% level (Fcount < Ftable = 19.00). Depth of cut showed the highest relative contribution (7.39%), while spindle speed and feed rate contributed negatively. A high error value (92.99%) suggests unobserved external factors. The optimal combination is 2388 rpm, 191 mm/min, and 2.67 mm, yielding a predicted MRR of 90.0766 (CI ±0.4126). Normality assumptions were met (p > 0.150).
Analisis Perbandingan Pengaruh Media Pendingin Dromus dan Air Radiator Terhadap Kekasaran Permukaan Baja S45C Pada Proses CNC Miliing Fatullah Faing; Eko Yudo; Zaldy Kurniawan
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.430

Abstract

This study aims to analyze the comparative effect of Dromus and radiator water cooling media on the surface roughness of S45C steel in the CNC Milling machining process. The quality of the machined surface is a critical indicator in the manufacturing industry, necessitating parameter optimization to achieve maximum efficiency. The Taguchi method with an L9 orthogonal array experimental design was used to evaluate the influence of three process parameters: spindle speed, depth of cut, and feed rate. Tests were conducted with three replications for each combination, and data were analyzed using the Signal-to-Noise (S/N) ratio calculation with the "smaller-is-better" category and ANOVA to determine the contribution of each factor. The results showed that Dromus cooling media consistently provided lower and more stable surface roughness values compared to radiator water. The optimal parameter combination found was a spindle speed of 1910 rpm, a depth of cut of 0.2 mm, and a feed rate of 330 mm/min. Contribution analysis revealed that when using Dromus, the depth of cut was the most dominant factor (63.40%), whereas with radiator water, spindle speed was the primary factor influencing surface roughness (45.67%).
Analisis Kelayakan Mesin Frais Horizontal Ajax Model 2A Mark V Berdasarkan Ketelitian Geometrik Muhammad Rizqi Pratama; Yudi Oktriadi; Eko Yudo; Erwansyah Erwansyah
Manutech : Jurnal Teknologi Manufaktur Vol. 18 No. 01 (2026): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v18i01.641

Abstract

The modern manufacturing method revolves on making high-quality items using a machine tool. Several variables, such as the condition of the equipment utilized in the operation, make it impossible to distinguish between the two. An example of a machine that is utilized for both student practicums and production at the Bangka Belitung State Manufacturing Polytechnic is an ajax horizontal milling machine type 2a mark v, which is almost 30 years old. So, using the machining results on the workpiece to verify the machine's geometry is essential. Machines that don't follow the specifications in the handbook need to be tested to make sure they're geometrically correct. Using experimental data analysis, this research will compare the machine table measurements with the outcomes of the machining process to establish the machine's practicality. Spindle speed (RPM) with three levels (100, 110, and 120 RPM) and depth of feed (mm) with three levels (0.4, 0.6, and 0.8 mm) are some of the characteristics that are used.  It was found that all of the workpieces had an unevenness variation ranging from 0.048 mm to a maximum of 0.169 mm. The level of flatness exceeds the table's tolerance of 0.03 mm. It is clear that the Ajax 2a Mark V horizontal milling machine is not up to snuff. It will be necessary to make changes going forward.
Multi - Response Optimization of MRR and Surface Roughness in CNC Turning of S45C Steel Using Taguchi - GRA Andra Ardiansyah; Muhammad Subhan; Eko Yudo
TURBO [Tulisan Riset Berbasis Online] Vol 15 No 2 (2026): TURBO: Jurnal Program Studi Teknik Mesin (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v15i2.5609

Abstract

The CNC Turning machining process is one of the widely used manufacturing processes due to its ability to produce components with high tolerance and precision, one example being the stepped shaft. Surface roughness and Material Removal Rate (MRR) are two important parameters that determine the quality and productivity of the machining process, particularly for S45C steel, which is widely applied in machine components such as gears, shafts, and others. However, the simultaneous optimization of these two responses remains a challenge, as they exhibit conflicting characteristics. This study aimed to determine the optimal process parameters for CNC Turning of S45C steel using a CNMG 120408 insert, and to investigate the effect of process parameters (spindle speed, feed rate, and depth of cut) on MRR and surface roughness. The method used was the Taguchi method with an L9(3³) orthogonal array, combined with Grey Relational Analysis (GRA) to transform the multi-response problem into a single Grey Relational Grade (GRG) value. The results showed that the optimal parameter combination consisted of a spindle speed of 1528 RPM, a feed rate of 0.252 mm/rev, and a depth of cut of 0.15 mm, yielding a confirmation test GRG value of 0.8137, higher than the predicted value of 0.7018. Meanwhile, the most influential machining process parameter was depth of cut, contributing the largest proportion at 36.396%.
Co-Authors Adam Maulana Adha, Adha Adhe Anggry Afgi Finofal Aisyah, Ratu Andra Ardiansyah Angga Satria Angga, Muhammad Angga Pratama Ardiansyah Ardiansyah Ariyanto Ariyanto Ariyanto, Aariyanto Arya Danutirta Bimas E Saputra Dersi Julianto Dharta, Yuli Dimas putra utama Eko Sulistyo Erni Chaerani Erwansyah, Erwansyah Erwanto Erwanto Fadel Ramiro Fahrizal Fahrizal Faing, Fatullah Fatullah Faing Febriyansa, Agus Feriadi, Indra Gilbran, Adin Hadi Usman Husman Husman ibnu salikin Idiar Ihwan Mukhtari Arifin Ikhya Naufal Izdihar Hirzani Jondi Supriyandi Khairun Nisah mahdan, zio eldi Mahendra, Anan Mar'i Akbar, Firzan Muhamad Fikri Burli Muhammad Haritsah Amrullah Muhammad Reza Mukhib Muhammad Rizqi Pratama MUHAMMAD SUBHAN Muhammad Yunus Nanda Pranandita Nicola, Adyu Nicola, Adyu Arya Nugraha, Amelia Oktafia Odidio Pratama Odidio Oktriadi, Yudi Pernanda, Gustian Ramli Ramli Ridho Rosmansyah Rina Melati Robert Napitupulu Rodika S Suzen, Zaldy Saputra, Aldi Yusuf Sateria, Angga SUBHAN, MUHAMAD Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sukanto Sukanto Sunding, Alang Suzen, Zaldy Sirwansyah Trisna Fitri Mutiari widyaastuti, eny erlinda yanto, Zulfitri Yuli Dharta Yuliyanto Yuliyanto Yuliyanto Zakdi Sirwansyah Suzen Zaldy Kurniawan zio eldi mahdan Zulfitri yanto Zulfitriyanto Zulfitriyanto Zulfitriyanto, Zulfitriyanto