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Journal of Mechanical Engineering and Applied Technology
Published by Politeknik Negeri Semarang
ISSN : -     EISSN : 30252725     DOI : http://dx.doi.org/10.32497/jmeat.v2i1
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Journal of Mechanical Engineering and Applied Technology (JMEAT) provides online media to publish scientific articles from research and development in the field of Mechanical Engineering and Applied Technology. The scope of Journal of Mechanical Engineering and Applied Technology (JMEAT) is as follows: Manufacture Maintenance Automotive Renewable Energy Agriculture Health Mechatronics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 86 Documents
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Uji Performa Kendaraan Motor Listrik Transmisi Chain dan Van Belt Wahyu Isti Nugroho; Ahmad Hamim Su’udy; Muhammad Showi Nailul Ulum; Slamet Priyoatmojo; Atikah Ayu Janitra; Ahmad Mamba'udin
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 1 (2026): VOLUME 4 ISSUE 1 YEAR 2026 (MARCH 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i1.7511

Abstract

The purpose of this study is to compare the performance of chain and belt timing transmission on a 2 kW electric motorcycle used in an electric conversion vehicle. This research is based on the popularity of electric motorcycles as an environmentally friendly transportation alternative and the need for more efficient transmission systems to improve vehicle efficiency. Although electric motors are highly efficient, it is important to choose the right transmission system to transmit power to the wheels. This study analyzes the effect of transmission type on the torque and power generated using dynotest testing to compare the performance of each. For this study, the transmission system was designed with a chain and timing belt with the same ratio. Then, using a dynotest, tests were conducted at various rotation speeds. The test results showed that the chain and timing belt produced greater torque and power at certain ratios, and the chain produced lower torque and power at other ratios. This study found that the transmission ratio affects the efficiency of torque and power transfer in chain and timing belt transmissions. By identifying the components that affect the performance of the transmission system, this study provides important information for the development of electric motorcycles. Ultimately, this will help electric vehicles become more efficient and reliable.
Front Matter Journal of Mechanical Engineering and Applied Technology, 4 (1) March 2026 Jmeat Jmeat
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 1 (2026): VOLUME 4 ISSUE 1 YEAR 2026 (MARCH 2026)
Publisher : Politeknik Negeri Semarang

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Abstract

Back Matter Journal of Mechanical Engineering and Applied Technology, 4 (1) March 2026 jmeat jmeat
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 1 (2026): VOLUME 4 ISSUE 1 YEAR 2026 (MARCH 2026)
Publisher : Politeknik Negeri Semarang

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Abstract

Uji Kinerja Mesin Perajang Daun Tembakau Sistem Conveyor Kapasitas 120 Kg/Jam Menggunakan Motor Listrik 1 Hp Harry Prayitno; Ampala Khoryanton; Gunawan Widodo; Erwan Tri Efendi; Mohammad Ragil Nur Huda; Desna Syarif Syawaludin; Indra Surya Al Muhith; Gutomo; Eni Safriana
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7503

Abstract

A Small and Medium Enterprise (SMEs) located in Jragung Village, Karangawen, Demak, is engaged in tobacco slicing with a harvest capacity of 400–600 kg. However, the production process is still performed manually using a conventional knife, yielding only 40 kg per day with four employees. This method is inefficient in terms of time, labor, and production output. Additionally, employees have reported health issues due to the prolonged slicing process. To address these challenges and improve productivity, the use of an automatic tobacco slicing machine is necessary. The purpose of this study is to design and develop a tobacco leaf slicing machine utilizing a conveyor system powered by two drive motors. The methods used include a literature review to obtain theoretical foundations and interviews to gather information from relevant sources. The developed machine has dimensions of 530 mm × 810 mm × 1,015 mm and is equipped with two electric motors: one rated at 0.75 HP and 1,400 rpm, and the other at 0.25 HP and 1,420 rpm. Based on test results, the machine achieved an actual slicing capacity of 124.76 kg/hour. The best slicing result was obtained at speed level 2, with slicing uniformity ranging from 2.4 mm to 3.0 mm and an accuracy of 92.29%.
Perancangan Mesin Sangrai Kacang Kulit Dengan Sisitem Pengluaran Tanpa Pengerukan Serta Analisis Simulasi Termal Selfi Herrani; Rani Puspita Dewi
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7601

Abstract

Peanut is one of the agricultural commodities commonly utilized by Micro, Small, and Medium Enterprises (MSMEs) as raw material for roasted peanut products. In general, the roasting process in small-scale industries is still carried out conventionally using manual stirring over an open stove. This condition often causes operator fatigue, uneven roasting quality, and inefficient heat usage. Several previous studies have developed roasting machines to improve productivity; however, the product discharge process still requires manual scraping and the heating system tends to consume relatively high fuel energy. Therefore, this research aims to design a peanut roasting machine equipped with an automatic discharge mechanism without manual scraping and supported by a single-burner heating system. The study applied an engineering design method combined with numerical simulation using SolidWorks 2024 software. The research stages consisted of literature review, component calculation, three-dimensional modeling, mechanical simulation, thermal analysis, and evaluation of simulation results. Mechanical analysis was conducted to determine the structural performance of the roasting cylinder under rotational loads, while thermal simulation was used to evaluate heat distribution from the heat source to the roasting drum. The simulation results indicated that the designed machine was able to reduce operator workload, simplify the discharge process, and provide more stable heat distribution during roasting. Consequently, the proposed machine design is expected to increase productivity and operational efficiency in household-scale roasted peanut industries.
Desain Rekayasa Mesin Pemisah Kulit Ari Kedelai Menggunakan Silinder Pengupas Dan Tenaga Blower Kapasitas 15 Kg/jam Eva Shandy Ratu Aliyyu; Rany Puspita Dewi
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7606

Abstract

Soybean (Glycine max) is an important food commodity widely used as raw material for tempeh and tofu production. However, the process of peeling and separating soybean skin in small and medium industries is still commonly performed manually, resulting in low efficiency and high processing time. This study aims to design a soybean skin peeling and separating machine using a dry process method with a capacity of 15 kg/hour. The research method used is quantitative, including literature study, numerical calculation, 3D design using SolidWorks, and simulation analysis. The machine utilizes a toothed peeling cylinder driven by a 0.25 HP electric motor and a blower system to separate soybean skin from seeds. The test results showed that the 2 mm gap variation produced the most optimal peeling result with 86% peeled soybeans and 93% intact seeds. The blower operated effectively at approximately 980 rpm with an airflow velocity of 6.76 m/s without causing seed loss. Simulation results showed a maximum stress of 35.74 MPa, displacement of 0.481 mm, and Factor of Safety (FOS) value of 6, indicating that the frame structure is safe for operation. Frequency analysis also confirmed that the machine is safe from resonance during operation. Therefore, the designed machine is considered effective, stable, and suitable for soybean processing in small and medium industries.
Model Regresi Kuadratik pada Pengepresan Biji Kemiri Dita Anies Munawwaroh; Abdul Syukur Alfauzi; Adhy Purnomo Purnomo; Ali Sai’in Sai’in; Elfrida Rizky Riadini
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7642

Abstract

Vegetable oil (seeds oil) is produced from seeds. To obtain vegetable oil, a seed extraction machine is required. Seed pressing machines have specifications based on their extraction method. In this study, candlenut seed oil was produced using an extraction machine using the extrusion method. This process uses a combination of heating, friction, and high pressure. A quadratic regression model was used to predict the effect of temperature on the volume of oil produced. The results showed that the optimal temperature for producing candlenut oil is 95.96 degrees Celsius.
Analisis Turbin Hidrokinetik Savonius Biomimetik Berbasis Kontur Tubuh Ikan Haruan (Channa striata) pada Kecepatan Aliran Rendah Rendi; Ahmandi Amin
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7659

Abstract

This study aims to investigate the effect of a biomimetic blade design based on the body contour of the snakehead fish (Channa striata) on the torque characteristics of a Savonius hydrokinetic turbine. The biomimetic concept was applied to the turbine blade geometry to evaluate its potential for improving hydrodynamic performance compared with a conventional Savonius turbine. The research was conducted using Computational Fluid Dynamics (CFD) simulations by comparing the moment coefficient (Cm) distribution as a function of rotor angular position for both biomimetic and conventional turbine configurations. The analysis was performed over a complete rotor revolution to identify torque generation characteristics and the influence of blade geometry on turbine performance. The results show that both turbine configurations exhibit similar moment coefficient distribution patterns, with the maximum moment coefficient occurring at rotor angles of approximately 30°–40° and the minimum moment coefficient occurring at rotor angles of approximately 110°–130°. However, the conventional Savonius turbine demonstrated superior performance compared with the biomimetic design. The maximum moment coefficient of the conventional turbine reached approximately 0.35, whereas the biomimetic turbine achieved only about 0.20. In addition, the biomimetic turbine produced a more negative minimum moment coefficient of approximately −0.40 compared with −0.30 for the conventional turbine. These findings indicate that the snakehead fish-inspired blade geometry employed in this study has not yet enhanced the rotor's torque-producing capability nor effectively reduced the adverse effect of the returning blade. Nevertheless, the proposed biomimetic concept remains promising and warrants further investigation through optimization of blade profile, blade orientation, overlap ratio, aspect ratio, and operating conditions to achieve improved hydrokinetic turbine performance
Analisis Simulasi Struktur Mesin Penggiling Ketela Menggunakan Sistem Rotary screw Berbasis SolidWorks Simulation Nazwa Naufal Noviantoro; Rany Puspita Dewi
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7681

Abstract

Cassava is one of the important agricultural commodities widely processed into various food products. The grinding process is a crucial stage that affects product quality and production efficiency. However, most small-scale cassava processing industries still utilize conventional grinding equipment with limited capacity and low operational efficiency. Various studies have been conducted to develop cassava processing machines, including slicing, peeling, grating, and grinding machines. Nevertheless, previous research has mainly focused on machine design and performance testing, while structural strength evaluation prior to manufacturing has received limited attention. Therefore, this study aims to analyze the structural characteristics of a cassava grinding machine frame using a rotary screw system through Finite Element Analysis (FEA) based on SolidWorks Simulation. The research was conducted by developing a three-dimensional machine model and performing static structural Simulations using SolidWorks Simulation. The frame material was modeled as alloy steel, while a static load of 1000 N was applied to represent the combined weight of machine components and cassava material during operation. The evaluated parameters included displacement, stress distribution, and factor of safety. The Simulation results showed a maximum displacement of 1.95 mm, indicating that the frame deformation remained relatively small and did not affect machine performance. The maximum stress obtained was 108 MPa, which was significantly lower than the material yield strength of 620 MPa, indicating that the structure operated within the elastic region. In addition, the minimum factor of safety was 5.7, demonstrating that the frame possessed a high level of structural safety under the applied loading conditions. Based on the Simulation results, the designed cassava grinding machine frame using a rotary screw system is structurally safe and feasible for manufacturing because it is capable of withstanding the intended operational loads.
Analisis Kinerja Turbin Angin Savonius Dengan Profil Sudu U, Sudu Helix Tanpa End Plate Dan Menggunakan End Plate Mitra Hari Ramadhan; Muhammad Firman; Heri Irawan
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 2 (2026): VOLUME 4 ISSUE 2 YEAR 2026 (JULY 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i2.7691

Abstract

This study aims to analyze the performance of a Savonius-type wind turbine through variations in blade profile and the addition of an end plate. Experimental testing was conducted using a wind tunnel across three configurations: Model A (U-profile), Model B (helical profile without end plate), and Model C (helical profile with end plate). Wind speed was varied at 3.0 m/s, 4.0 m/s, and 5.0 m/s to evaluate turbine performance, including rotor rotational speed, torque, mechanical power, Tip Speed Ratio (TSR), and power coefficient (Cp). The results demonstrate that blade geometry modification combined with end plate addition significantly improves turbine performance. Model C exhibited the best performance, achieving a maximum mechanical power of 0.36 W and a maximum torque of 0.0135 Nm at a wind speed of 5.0 m/s. Furthermore, Model C attained the highest power coefficient (Cp), with a maximum Cp of 0.16 at a wind speed of 3.0 m/s, indicating the most optimal aerodynamic efficiency. In conclusion, the combination of a helical blade and an end plate effectively reduces tip losses while maximizing energy conversion. This design is therefore strongly recommended for the development of micro-scale wind power generation in regions characterized by low wind speeds.

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