Journal of Applied Mechanical Engineering and Renewable Energy
The Journal of Applied Mechanical Engineering and Renewable Energy (JAMERE) at https://journal.isas.or.id/index.php/JAMERE) is a blind peer-reviewed journal dedicated to the publication of quality research results in the field of Mechanical Engineering and Technological Innovation. Articles published in the JAMERE Journal include original scientific research results (top priority), while for scientific review articles that are new (not top priority) and also comments that are critical of the results of scientific papers published by the JAMERE journal. All publications in the JAMERE journal are open access that allows articles to be freely available online without subscribing to anything.
Comparative Analysis Study of Corrosion Rate on the Surface of 1100-0 Aluminum Plate Material Using Epoxy Paint Inhibitor Diton 9120 Primer Grey in Seawater Solution K3Fe 9.0%, NaOH 4.76%
Corrosion is a material whose process is slow. Various factors can influence corrosion, including the environment of the metal mixture and others. Aluminum is easily formed, can be forged into sheets, drawn into wires, and extruded into rods with various cross-sectional shapes. Inhibitors are generally chemical substances. The use of three different types of solutions has a significant effect on the corrosion rate on the surface of the 1100-0 aluminum plate. HCl solution shows the highest level of corrosivity because it is a strong acid that can dissolve the protective oxide layer of aluminum, thereby accelerating the electrochemical reaction and significantly increasing the corrosion rate. The use of inhibitors in the form of epoxy paint is necessary to protect the surface of 1100-0 aluminum because this material is susceptible to corrosion when directly exposed to acidic, oxidative, or basic solutions. Epoxy paint functions as an effective barrier layer to prevent direct contact between the aluminum surface and the corrosive environment.
Copyright (c) 2026 Yuliana Simons, Fransye Joni Pasau, Muhammad Syarif, Yosua Lau Yalla, Dwi Yusprasetyo https://creativecommons.org/licenses/by/4.0/
Perancangan Model Turbin Air Dengan Sistem Sirkulasi Tertutup
Modern society is very closely related to technological advances, with community technologycan easily meet energy needs, one example is the electrical energy processing of energy conversion machines using turbine energy. The purpose of this design as a problem solving faced in areas with no stream or waterfall to make a water turbine with closed circulation model. The methodology in this design is an experiment that is supported by the 2010 autocad program. From the design results obtained turbine power of 1.56 watts with a tank as a benchmark design and the use of the pump (positive displacement pump) as a means of circulation
Copyright (c) 2026 Muh Anhar, Yudhi Chandra Dwiaji https://creativecommons.org/licenses/by/4.0/
Rancang Bangun Mesin CNC Painting Berbasis Mach 3
This study presents the design and development of a CNC Painting machine based on Mach3 software, aimed at enabling automated Painting processes with controlled and uniform results. The project was motivated by the need for a system that can replace manual Painting methods, reduce operator dependency, and ensure consistent coating quality. The methodology involved the mechanical design of the X, Y, and Z axes, the integration of a pneumatic system to actuate the spray gun trigger, and the implementation of a Mach3-based control system to regulate stepper motor movements according to programmed trajectories. Comprehensive testing was conducted on all subsystems, including mechanical axis motion and spray functionality. The experimental results demonstrate that the machine is capable of operating across all axes and performing Painting tasks effectively. The pneumatic trigger mechanism responded reliably to program commands, enabling fully automated Painting operations. In conclusion, the CNC Painting machine developed in this project successfully achieved its intended function and shows potential for applications requiring repetitive Painting tasks with consistent outcomes
Copyright (c) 2026 Rudi Kristianto, Y AstomoD.S, Chatarina Adjeng Aprilliasari, Benedictus Bimo Kurniawan, Dionicius Wijang Fenandy Esa, Muhammad Rosyid Wijaya, Reza Andhika Sudiyoko https://creativecommons.org/licenses/by/4.0/
Pengaruh Pembersihan Biogas Menggunakan Larutan NaOH terhadap Performa Motor Bensin: Studi Komparatif RPM, Torsi, Konsumsi Bahan Bakar, dan Emisi Gas Buang
This study investigates the effect of biogas purification using sodium hydroxide (NaOH) solution on the performance of a four-stroke gasoline engine. Biogas is a promising renewable energy source, but the presence of contaminants such as CO₂, H₂S, and water vapour reduces its calorific value and can cause corrosion in engine components. In this research, biogas is purified using NaOH solution with four concentration levels (0%, 10%, 20%, and 30%), and then supplied to a gasoline engine as an alternative fuel. The measured parameters include engine speed (RPM), torque, brake specific fuel consumption (BSFC), exhaust gas temperature, and exhaust emissions (CO, CO₂, HC, O₂) under several load conditions. The results indicate that a NaOH concentration of 20% is optimal, reducing CO₂ content by about 70% and significantly increasing CH₄ purity, which leads to an improvement in torque by approximately 8–12% and a reduction in BSFC compared to untreated biogas. Furthermore, the purified biogas lowers CO and HC emissions and slightly reduces CO₂ emissions relative to raw biogas, demonstrating better combustion quality and environmental performance while maintaining engine operation that is comparable to gasoline fuel.
biogas, NaOH purification, four-stroke gasoline engine, engine performance, exhaust gas emissions
Copyright (c) 2026 Yudhi Chandra Dwiaji https://creativecommons.org/licenses/by/4.0/
Pengaruh Kecepatan Potong dan Kecepatan Pemakanan terhadap Kekasaran Permukaan Baja ST42 pada Proses Pembubutan Konvensional
This study analyses the effects of cutting speed, feed rate, and depth of cut on the surface roughness produced during the turning of ST42 carbon steel. The experiments were conducted using a conventional lathe with ST42 steel specimens of 30 mm in diameter and 50 mm in length. The machining parameters were varied at cutting speeds of 100–500 rpm, feed rates of 2.25–2.50 mm/rev, and depths of cut of 1.5 mm and 2.5 mm. Surface roughness measurements were performed using a Mitutoyo SJ-310 surface roughness tester. The results indicate that increasing the cutting speed reduces surface roughness, whereas increasing the feed rate leads to higher surface roughness values. The lowest surface roughness value of 3.792 µm was obtained at a cutting speed of 500 rpm, a feed rate of 2.25 mm/rev, and a depth of cut of 2.5 mm
ST42 steel; conventional turning; cutting speed; feed rate; surface roughness
Copyright (c) 2026 Budha Maryanti, Fransye Joni Pasau, Veryyon Harahap, Lia Pongsapan, Renaldi Putra https://creativecommons.org/licenses/by/4.0/
Effect of Varying Mixtures of Distilled Water and Mineral Water in Electrolyte Solution on Battery Voltage
Accumulator/battery is a type of battery that is widely used for motorized vehicles. Motorcycle batteries are generally divided into two types, namely wet batteries and dry batteries. Inside a wet battery there is a liquid called electrolyte, this electrolyte is made from acid and water. However, the acid content produced is sometimes not the same due to the inappropriate selection of the water mixture used. The aim of this research is to find out the most effective electrolyte mixture for battery voltage performance by comparing the use of distilled water and mineral water. This research method is experimental by comparing variations in electrolyte solutions in two batteries with a capacity of 35Ah and 45Ah. The output used for comparison is the measurement of the voltage value produced by the two batteries being tested. Testing was carried out within a period of 15 minutes to 120 minutes before and after charging. Measurements on a car with a capacity of 1200 cc with a rotation of 1000 rpm to 3000 rpm, the electrolyte solution in distilled water obtained a higher voltage value than mineral water, with the voltage during the first pour after 120 minutes being 12.9 volts and after being charged it rose to 13.6 volts. The conclusion of this research is that for long-term use, distilled water electrolyte is better than mineral water electrolyte which heats up easily when used for long periods of time and at high rpm.
Copyright (c) 2026 Siti Norhidayah, Hildar Saputra, Yano Hurung Anoi, Ratnawati Ratnawati https://creativecommons.org/licenses/by/4.0/
Perawatan Dan Perbaikan Fruit Elevator Pabrik Kelapa Sawit
The palm oil plantation and processing industry is a key industry for Indonesia's economy. Palm oil exports are an important source of foreign exchange earnings, and this industry provides employment opportunities for millions of Indonesians. According to data from the Indonesian Ministry of Agriculture, the total area of palm oil plantations in Indonesia currently reaches around 8 million hectares, twice the area in the early 2000s, with around 30% located on the island of Kalimantan. In an analysis of the factors affecting Indonesia's palm oil exports (Ditjenbun, 2018). This research method is a qualitative research that emphasizes more on the process and results, how a treatment and care occurs and how to handle it effectively. Conclusion, Preventive maintenance is carried out on bucket bolts, bucket chains, transmission chains, and buckets. Preventive corrective maintenance is carried out on gearboxes, transmission chains, sprocket bearings, buckets, and bucket chains. Preventive breakdown maintenance is carried out during the replacement of bucket chains, sprocket bearings, and transmission gears. There are various types of damage that commonly occur in Fruit Elevators, including: damage to buckets, sprocket bearings, gearboxes, oil seals, and bucket chains. The causes of damage generally come from wear and tear, lack of lubrication, or mechanical wear due to high workload. Daily, weekly, monthly, and annual maintenance has been carried out with respective procedures such as lubrication, component checks, replacement of spare parts, and overhaul. The implementation of this maintenance schedule has proven effective in reducing the frequency of damage. Component replacement history data shows that components such as liners, sprockets, buckets, and gearboxes have the highest damage rates, thus requiring special attention and periodic monitoring to prevent repeated damage.
Keywords: Fruit Elevator, Preventive Maintenance, corrective maintenance, overhaul
Copyright (c) 2025 Ismael Marjuki, Epriyandi Epriyandi, Rafly Miftakhul Sasti https://creativecommons.org/licenses/by/4.0/
Analisisi Penelitian Performansi Pompa Air Pada Divisi Persemaian Di Kalimantan Timur
The engine pump is used to move fluids by converting mechanical energy into fluid energy and pressure, then transporting the fluid through the piping system. The use of pumps to meet clean water needs. The method with the working principle or how the pump flows fluids or provides fluid power, the results of the study show that the pump capacity with a water discharge of 15 L / m, the total head is 4.807 m, and after knowing the curve where there is an increase in pressure at the outlet (discharge pressure) there will be a decrease in the amount of flow and the higher the amount of flow that comes out, the higher the pressure capacity of the fluid. In the demin water transfer pump, it is known that the available NPSH (6.7 meters) is greater than the required NPSH (6.2 meters), so the pump can. So to fill the water reservoir at the Permanent Nursery Service, the pump operates for 8.5 hours per day. Data analysis and discussion can be concluded that the pump capacity with a water discharge of 15 L/m, the total head is 4.807 m, In the demin water transfer pump it is known that the available NPSH (6.7 meters) is greater than the required NPSH (6.2 meters), so the pump can work without experiencing cavitation. So to meet the needs of the water reservoir in the Permanent Nursery Division, the pump operates for 8-5 hours per day.
Copyright (c) 2025 Marsius Ferdnian,Fransye Joni Pasau
Analisa Performa Dessicant Dehumidifier Terhadap Bukaan Damper Pre-Cooling Dengan 10 – 100% Bukaan Pada Aplikasi Clean Room PT Marin Liza Farmasi
Indonesia is a country that has a tropical climate, so the content of water vapour in the air is very high, therefore many industrial products are damaged due to high humidity, such as products with hygroscopic material characteristics, for example powder products, medicine tablets, sugar, fertilisers or products with other similar applications. The product will experience clumping so that the resulting product quality is not optimal. On the other hand, high air humidity in a controlled room is certainly very detrimental to the continuity of the production process as well as in clean room applications. Effervescent’s production room at PT Marin Liza Farmasi is an example of a clean room with temperature and RH controlled at 23°C and a water vapour content of 3.47 g/kg with RH less than 20%. If the temperature and water vapour content are not met, production cannot be carried out. The room is positively pressurised with 1177 CFM of fresh air. Damper in pre-cooling is a part that is very influential on the performance of desiccant dehumidifier. Pre-cooling dampers with openings of 10% - 100% openings will affect the value of the bypass factor and air contact factor against the evaporator cooling coil on the pre-cooling AHU, this will also affect the amount of water vapor partial pressure which is influenced by the large temperature coming out of the pre-cooling AHU due to the influence of the evaporator coil temperature. Each damper opening will be tried and analyzed to get the best water vapor content out of the dehumidifier without disturbing the performance of other systems. The damper openings selected for the Effervescent production clean room project at PT Marin Liza Farmasi are the 50% and 60% openings that produce the best dehumidifier performance without interfering with the performance of other systems, which at these openings produce a dehumidifier outlet water vapor content of 1.12 g/kg at the 50% opening with a bypass factor in pre-cooling of 12.26% and 1.2 g/kg at the 60% opening with a bypass factor in pre cooling of 12.90%.
Copyright (c) 2025 Ade Maulana, Yudhi Chandra Dwiaji
Pengaruh Variasi Suhu Pirolisis terhadap Karakteristik Bio-Oil dari Limbah Batang Tembakau sebagai Bahan Bakar Alternatif
Limbah batang tembakau memiliki potensi sebagai bahan baku alternatif untuk produksi bio-oil melalui pirolisis. Pirolisis adalah metode termokimia yang mengubah biomassa menjadi bio-oil, biochar, dan gas pirolitik, dengan suhu yang berbeda memengaruhi karakteristik produk. Namun, kualitas bio-oil yang dihasilkan bergantung pada parameter proses, terutama suhu pirolisis, yang memengaruhi tingkat pH, Total Padatan Terlarut (TDS), dan kadar alkohol. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi suhu pirolisis terhadap karakteristik bio-oil yang berasal dari limbah batang tembakau guna mengoptimalkan pemanfaatannya sebagai bahan bakar alternatif. Eksperimen dilakukan dengan menggunakan suhu pirolisis 290°C, 390°C, dan 490°C selama 60 menit, kemudian dianalisis sifat bio-oil melalui pengukuran pH, TDS, dan kadar alkohol. Hasil penelitian menunjukkan bahwa peningkatan suhu pirolisis menyebabkan peningkatan keasaman bio-oil, yang membatasi penggunaannya pada mesin konvensional namun membuatnya cocok untuk pembakaran langsung di boiler. Tingkat TDS meningkat hingga suhu 390°C sebelum sedikit menurun pada 490°C, yang mengindikasikan degradasi termal senyawa terlarut pada suhu tinggi. Selain itu, kadar alkohol dalam bio-oil menurun seiring meningkatnya suhu pirolisis karena volatilitas yang lebih besar pada tingkat panas yang tinggi. Penelitian ini memberikan wawasan mengenai karakteristik bio-oil dari pirolisis batang tembakau, yang dapat menjadi referensi dalam mengoptimalkan teknologi konversi biomassa untuk aplikasi energi yang lebih efisien dan berkelanjutan.
Bio-oil, Karakteristik bahan bakar, Pirolisis, Suhu pirolisis, Limbah batang tembakau
Copyright (c) 2025 Bagus Dwi Kurniawan, Asroful Abidin , Kosjoko
Desain dan Analisis Pengujian Statik pada Chassis Mobil Golf Menggunakan Software Solidworks
Perkembangan kendaraan listrik sebagai solusi transportasi ramah lingkungan mendorong inovasi dalam desain kendaraan ringan, termasuk mobil golf yang digunakan di lingkungan terbatas seperti kampus. Penelitian ini bertujuan untuk merancang dan menganalisis chassis mobil golf yang sesuai untuk digunakan di lingkungan Universitas Muhammadiyah Jember. Desain dilakukan dengan tipe ladder frame menggunakan dua jenis material baja karbon rendah, yaitu AISI 1015 dan AISI 1020. Proses desain dan simulasi dilakukan menggunakan software SolidWorks 2018 dengan fokus pada tiga parameter utama: tegangan (stress), perpindahan (displacement), dan faktor keamanan (Factor of Safety/FOS). Desain chassis diuji menggunakan beban statik yang merepresentasikan penumpang dan komponen kendaraan. Hasil simulasi menunjukkan bahwa desain terbaik diperoleh pada material baja AISI 1020, yang menghasilkan nilai tegangan maksimum sebesar 111,924N/mm², displacement maksimum 0,934mm, dan FOS sebesar 3,1. Penelitian ini menunjukkan bahwa pemilihan desain dan material sangat berpengaruh terhadap performa struktural chassis, serta menegaskan bahwa SolidWorks dapat digunakan secara efektif untuk simulasi awal dalam pengembangan kendaraan ringan.
chassis mobil golf, SolidWorks, AISI 1015, AISI 1020, stress, displacement, factor of safety
Copyright (c) 2025 Gilang Purnawan, Nely Ana Mufarida, Kosjoko, Nurhalim
Perancangan Mesin Pengolah Sampah Plastik Jenis Polyehthylene Terephthalate (PET) Menjadi Biji Plastik Dengan Metode Ekstrusi
A plastic extrusion machine is a tool that can be used to process plastic waste into plastic pellets which can be reused to produce plastic products. Therefore, learning and applying these tools is useful for reprocessing plastic waste which is currently increasing. However, it is a shame that the tools currently on the market are relatively uneconomical for institutional scale processing, because the majority of tools on the market are intended for industrial scale. The output of this design produces a prototype tool with dimensions of 1005x350x830 mm and a capacity of 376 grams/hour. Maximum total energy consumption is less than 1 kW. The design of this plastic extrusion machine uses a screw conveyor, a 200Watt band heater and has 2 functions in 1 machine. The first function is to extrude chopped PET plastic and the second function is to cut the extrusion product so that the output of this machine is plastic pellets.
Plastic Extrusion, Design, PET Waste, Plastic Seeds, Waste treatment
Copyright (c) 2025 Devi Eka Septiyani Arifin, Rudy Yuni Widiatmoko, Muhammad Ihda Alwan
Composite Material Impact Test With Resin Matrix And Kenaf Fiber Reinforcement Using The Hand Lay Up Method
The purpose of this study was to obtain the results of impact testing on composite material with the arrangement of kenaf fibers in woven with volume variations of 0%, 10%, 20%, 30%, 40%, and 50%. The value obtained from impact testing with 0% fiber variation has an average energy absorption yield of 1.730623009 J and an average impact price of 0.01273547 J/mm², 10% fiber has an average absorption energy yield of 1.468150063 J and an average yield of 1.468150063 J The average impact price is 0.01080396 J/mm², 20% fiber has an average energy absorption yield of 1.730623009 J and an average impact price is 0.01273547 J/mm², 30% fiber has an average energy absorption yield of 1.214516698 J and the average yield is 1.214516698 J The average impact price is 0.008937499 J/mm², 40% fiber has an average energy absorption yield of 1.993095955 J and an average impact price is 0.01466698 J/mm², 50% fiber has an average energy absorption yield of 2.264328531 J and an average yield of 2.264328531 J Average Impact Price 0.016662952 J/mm². This composite material is made with epoxy resin as a binder and kenaf fiber as a reinforcing material. The method used is hand lay-up and specimen testing using charpy impact. After testing, a micro photo will be taken to see the best specimen fracture results.
composite, kenaf fiber, epoxy resin, hand lay-up, impact, micro photo.
Copyright (c) 2023 Ferry Setiawan, Akmal, Dhimas Wicaksono, Muh Anhar
Analysis Of Tensile Strength And Microphotograph Of Corn Fiber Specimen Using Lycal Resin With Variations Of Vacuum Infusion And Vacuum Bagging Methods
Along with the development of drone technology, the development of technology in the field of materials also plays a role in advancing drone technology, where the use of materials for making drones must meet certain criteria. The natural fiber as a composite material used in this study is corn husk fiber. The type of matrix used in this study is lycal resin. And making it using the vacuum infusion and vacuum bagging methods. In addition, microstructure testing is carried out to determine the content of the content contained in the low-carbon steel specimen to be tested. By using a test specimen that has been refined so that the content in the test object can be seen. The method in this study was made of a specimen of corn fiber with lycal resin using the vacuum infusion and vacuum bagging methods, then it will be tested using tensile and microstructure tests. The results of the characteristics of the corn fiber composite material with the vacuum infusion manufacturing method, from the tensile test obtained an average value of 7.3 MPa, and in the microstructure test it can be seen that the fracture occurred due to air bubbles trapped in the specimen and the uneven weaving distance so that it affects the tensile strength. Characteristics of corn fiber composite material with vacuum bagging manufacturing method: from the tensile test results obtained an average value of 15.13 MPa, and in the microstructure test it can be seen that the fiber density level and the vacuum bagging method can produce higher specimen quality compared to vacuum infusion.
Copyright (c) 2025 Feryy Setiawan, Gilang dina prasetia , Indreswari suroso, Muh anhar
Transformasi Teknologi dalam Sel Surya Film Tipis Generasi Kedua
Efficiency and cost are important points in the development of the renewable energy industry, especially solar cells. While the first generation of crystalline silicon-based solar cells had the biggest constraint in cost, the second generation of thin-film solar cells is trying to offer innovations with relatively lower cost but high flexibility compared to the first generation. This article explores the essential developments in the invention of second-generation thin-film solar cells, including materials, performance, and technology. Through their respective fabrication processes, ultra-thin-film solar cells based on various materials such as amorphous silicon, Cadmium Telluride/Cadmium Sulfide (CdTe/CdS), and Copper Indium Gallium Selenide/Copper Zinc Tin Sulfide (CIGS/CZTS) were discovered. With these types of thin-film cells as well, the use of solar cells is more flexible for various applications mainly due to their lighter weight. Although the efficiency of their photovoltaic effect or light-to-electricity conversion is generally lower than that of crystalline silicon solar cells, these thin-film solar cells are efficient in absorbing light in dimmer conditions.
Copyright (c) 2025 Shakila Anandia Putri, Arini Dini Farhani, Alena Shania Anjani, Albert Daniel Saragih, Putri Nuri Nilam Sari, Noto Susanto Gultom
Pengelolaan Operasional Water Treatment Sebagai Upaya Peningkatan Proses Pengolahan Air Sungai
Water sources such as rivers, lakes, and reservoirs often have quality issues, making them unsuitable for daily human use. Despite ongoing government and societal efforts to control waste and reduce pollution, water treatment remains critical to ensure its suitability for consumption. Effective water resource management requires specialized skills, including design, technical implementation, operational capabilities, and maintenance. Post-construction, water treatment projects frequently face issues such as substandard operations and inadequate maintenance. This study explores methods to enhance river water quality through improved operational management and maintenance. Key improvements involve regular equipment inspections, planned operations, and diligent maintenance control. Findings indicate that equipment performance is within acceptable ranges, with average motor vibration at 0.25, engine temperature at 49.3°C, and engine speed at 1230 rpm. Water quality after treatment shows a pH of 7.71 NTU, demonstrating that operational and maintenance standards are being met effectively.
water quality, treatment, operational management, maintenance, resource management
Copyright (c) 2025 Aris Puja Widikda, Farid Mujayyin
Analisis Unjuk Kerja Pompa P-8340A Pada Motor Listrik Dan Motor Diesel Di Tangki T-8320A/B
This research aims to analyze the performance of the pump P-8340A operated by an electric motor and a diesel motor in the tank T-8320A/B. Apart from focusing on the performance of the two types of motors as pump drivers, this study also evaluates the time to fill the fire fightine water tank and the factors that influence the operational efficiency of the pump.The research methods used include taking field data at the operating location, analyzing flow capacity, pressure head and speed head, as well as calculating pump power and efficiency. The analysis results show that pumps with electric motors have a longer charging time compared to diesel motors, namely 38 hours for electric motors and 29 hours for diesel motors, with flow capacities of 239.68 m³/h and 310.54 m³/h respectively.From this research it was also identified that the total head losses in the pump were influenced by friction factors in the piping system and the characteristics of the fluid being transferred. The conclusion of this research is that although electric motors are more efficient in energy consumption, diesel motors are still superior in capacity and speed in operating the P-8340A pump. Recommendations for future operations include closer monitoring of the piping system and considering modifications to the drive system according to operational needs.
filling pump, electric motor, diesel motor, pressure drop, tank
Copyright (c) 2025 Siti Norhidayah, Herdi Kusmianto, Yano Hurung Anoi, Arief Muliawan
Pengaruh Jenis Pahat Terhadap Nilai Kekasaran Permukaan Material Baja Carbon S45C
In the turning process, the surface finish of a workpiece can influence the level of visual quality of a workpiece. CNC machine cutting parameters include feed speed, feed depth, and cutting speed. The aim of this research is to determine the effect of carbide insert tool types ZCC WNMG 060408 – DM and VBMT 160408 – HM on the average roughness value in the turning process with a rotational speed of 500 rpm and feed speed variations of 0.10 mm/rev, 0.15 mm/ rev and 0.20 mm/rev on S45C steel material. This research is located at PT. Bin Smeer Jaya with the research sample, namely S45C steel material. This research will be carried out with 3 samples of surface roughness testing each with varying feeding, where the turning process will be carried out on a CNC lathe machine first using ZCC WNMG 060408 – DM and VBMT 160408 – HM carbide insert chisels. The desired roughness standard is 1.8 µm – 2.2 µm. Based on the results of testing the surface roughness value of S45C steel material, the data obtained using the Handysurf E-35 surface roughness measurement tool, the roughness value using the ZCC WNMG 060408 – DM specimen 3 feeding 0.20 mm/rev carbide insert chisel was 2.38 µm, whereas for specimen 3 feeding 0.10 mm/rev is 4.11 µm. Then for the VBMT 160408 – HM carbide insert chisel, specimen 1 feeding 0.10 mm/rev is 1.48 µm, while for specimen 2 feeding 0.20 mm/rev it is 4.41 µm. So it can be concluded that the lowest roughness value occurs in the VBMT 160408 – HM carbide insert chisel compared to the ZCC WNMG 060408 – DM carbide insert chisel type. Therefore, the best level of surface roughness results occurs in the VBMT 160408 – HM carbide insert with the desired roughness standard and optimal visual quality
Variasi feeding, S45C, Pahat insert carbide, CNC, Nilai kekasaran permukaan
Copyright (c) 2025 ezaldy, Budha Maryanti , Fransye Joni Pasau
Analisis Uji Bending Pada Spesimen Serat Kulit Jagung Fiberglass Dengan Perpaduan Resin Lycal Menggunakan Variasi Metode Pembuatan Vacuum Bagging Dan Vacuum Infusion
This research aims to analyze the bending strength of composite materials based on corn fiber and fiberglass with Lycal resin, which are produced using two methods, namely vacuum bagging and vacuum infusion.Composite materials are increasingly being used in various industries because of their light and strong haracteristics. In this research, corn fiber was chosen as a natural reinforcement material because of its abundant availability and economic potential, while fiberglass was used as additional reinforcement to increase the strength of the material.The composite manufacturing process is carried out using two different methods, namely vacuum bagging and vacuum infusion, which are then tested using the ASTM-D 790 standard to determine the mechanical characteristics of the material, especially in terms of its ability to withstand bending loads. Apart from the bending test, material density calculations were also carried out to compare the weight and density of the two manufacturing methods.The test results show that the vacuum infusion method producescomposites with higher flexural strength than vacuum bagging. This is caused by a more even distribution of resin and minimal air trapped in the material structure during the vacuum infusion process. The composite produced from this method also has a lower density, making it lighter but still mechanically strong.It is hoped that this research can contribute to the development of natural fiber-based composite materials that are environmentally friendly and efficient, and have the potential to be applied to the aerospace industry, especially in the manufacture of UAV structures
Serat Jagung, Fiberglass, Resin Lycal, Vacuum Infsuion, Vacuum Bagging, Uji Bending.
Copyright (c) 2025 Ferry Setiawan, Chairul Amri, Indreswari Suroso, Muh Anhar
Pengaruh Jenis Bahan Bakar Terhadap Emisi Gas Buang Injection Otto Engine System
The use of motorized vehicles currently experiences a very significant increase, this has an impact on increasing air pollution due to exhaust gas emissions from combustion. One of step to minimize the level of air pollution due to exhaust emissions is to choose the right fuel, so that the combustion in the combustion chamber is perfect. Based on this, a problem was formulated related to the influence of fuel’s type on exhaust gas emission values in vehicles with injection otto engine system technology. The research object is the 2017 Toyota Sienta 1.5 G M/T car using electronic fuel injection. The types of fuel used in this research are Pertalite, Pertamax, and Pertamax Turbo. The Test results from the use of Pertalite, Pertamax and Pertamax Turbo fuel types show that the exhaust gas emission values for CO, HC and CO2 content will decrease when the engine speed is higher. The best type of fuel from the test results is Pertamax Turbo RON 98, because almost all test results for CO, HC and CO2 content at various types of engine speed show the lowest results. In accordance with the Minister of Environment Regulation No.06 of 2006 concerning Exhaust Gas Emission Thresholds for Old Motor Vehicles, the vehicle tested was declared to have passed the exhaust emission test. Minister of Environment Regulation, 2006 determines the maximum threshold values for CO = 1.5% and HC = 200 ppm.
Copyright (c) 2025 Bayu Aji Sudikna, Puji Saksono, Marsius Ferdnian, Sadat N.S. Sidabutar
Pengaruh Kapasitas Cavitation Air Flotation Terhadap Penurunan Total Suspended Solid Berdasarkan Baku Mutu Air Limbah di PT. X
Effluent Treatment Plant (ETP) is an environmentally based regional waste treatment system that aims to treat liquid waste so that it can produce waste that meets quality standards. Liquid waste that cannot be treated properly can result in environmental pollution. The research methodology used is a method of observation study by direct observation including the processing process in the ETP plant, the data collected is calculated based on the parameters of liquid waste before and after processing. From the data, there are several days that show that only 80% of waste can be treated on ETP from the total waste sent from the production plant. This has an impact on the quality of TSS (Total Suspended Solid) parameters treated at CAF experiencing outspec of 20.79% of the operational standards of TSS parameters in PT X. Based on the results of research found that CAF (Cavitation Air Flotation) capacity is less maximal when the flowrate of waste to be treated is high so that the treatment capacity in ETP cannot keep up with the amount of waste sent from the production plant. This can cause the level in the accident pond and equalization pond high and eventually result in wastewater overflowing into the environment so from this analysis process is obtained the proposed improvement of the process to improve the performance of IPAL is to add CAF to the pre-treatment process.
Copyright (c) 2025 Monika Tio,Yudhi Chandra Dwiaji
Analisis Crack Pada Robot Exoskeleton Lower LIMB
Failure due to material fatigue can be potentially fatal as it may lead to fractures without any initial detectable deformation. Factors such as high maximum load and large stress cycles accelerate the material fatigue process. In the design of a lower limb exoskeleton robot, the strength and safety of the robot are primary focuses, particularly in the Link Joint mechanism. The comfort and safety of the structure are determined by the geometry and type of material used. Analysis using Fracture Mechanics is employed to evaluate cracks in the Link Joint mechanical structure, with the calculation of the Stress Intensity Factor (SIF) value as an indicator of the stress intensity on the crack due to load. This research aims to identify critical stress and estimate the service life of the mechanism through testing using Finite Element Method-based software, specifically Solidworks 2020.
Robot Exoskeleton Tungkai Bawah, retak, SIF (Stress Intensity Factor)
Copyright (c) 2025 Muhammad Fadhil Al Fadjri, Daniel S Pamungkas, Hanifah Widiastuti
Airflow Velocity Measurement Of Turbular Test Section Based On Rpm Setting Configuration In Open Circuit Subsonic Wind Tunnel
Speed measurements in the test section based on the RPM setting configuration of the open-type subsonic wind tunnel with a turbular test section to obtain the properties of the airflow in the test section based on the RPM setting configuration in the open-type subsonic wind tunnel. The simulation process is carried out using software Computational Fluid Dynamics (CFD) , ANSYS Fluent. The simulation process is carried out by the method Moving Reference Frame (MRF) that the fluid phenomenon is moved to move the fan in the wind tunnel to obtain airflow properties in the turbular test section, open-type subsonic wind tunnel. In the testing process, airflow velocity measurements were carried out in the turbular test section of the open-type subsonic wind tunnel using an air velocity measuring instrument, namely anemometer and hotwire. The software Computer Aided Design (CAD), Solidworks, serves to create the geometry of the open-type subsonic wind tunnel and has a turbular test section inspired by the Didacta Italia PN21 D open-type subsonic wind tunnel. The properties that occur in the test section based on the configuration of the RPM setting in the open-type subsonic wind tunnel turbular test section are expected to achieve results to obtain the value of the velocity distribution, pressure distribution and turbulence intensity value so that it is useful and supports the operation and testing process to be carried out in an open-type subsonic wind tunnel with a turbular test section.
wind tunnel, fluid computation, fan simulation, moving reference frame, test section.
Copyright (c) 2024 Nanda Syifa Fauziah Rahmani, Sugianto, Deden Masruri
Design of a Water Tower Building in a Sea Water Reverse Osmosis System
Water tower buildings using the SWRO (Sea Water Reverse Osmosis) system are needed as part of processing sea water into clean water. So that it can be used by the local community to meet their daily needs. In this research we designed a water building in the SWRO system by analyzing it using the FEM method. The upper frame is made from gray cast ATM A48 material with grade 25 with a C channel type profile measuring 80x8 mm. Meanwhile, the supporting frame is made of gray cast ATM A48 material with grade 25 with an L type profile with dimensions of 40x40x3 mm and 30x30x3 mm. The largest stress load stimulation was obtained at 415.8 MPa on the upper frame, which indicates it is in the safe category. Meanwhile, the largest displacement value was 60.46 mm for the upper frame. This shows that the design of water structures in the SWRO system in this research can be classified as safe.
Copyright (c) 2024 Frenki Imanto, Auliana Diah Wilujeng, Misbakhul Fatah, Abdul Hamid, Septian Dwi Wijaya
Rancang Bangun Mesin Poles untuk Material Logam
The polishing machine is widely used as an instrument to shine or smooth the surface of an object, one of which is a specimen before and after the electroplating process. The objects polished with this machine become shinier and perfectly clean. This research includes several stages: (1) Design, (2) calculation and component selection, (3) fabrication and assembly of components, and (4) functional testing of each component. The results showed that the polishing machine can function well according to standards. The polishing machine that has been made works using electrical energy from a 1 HP 1 Phase motor with a power of 0.75 kW and a rotational speed of 2800 Rpm. It was concluded that this polishing machine had succeeded in restoring function and performance with several aspects of change which increased tool performance. The results on steel material show that corroded steel can turn clean and shiny after the sanding process is carried out with the polishing machine.
polishing machine, design, drive motor, steel material
Copyright (c) 2024 Devi Eka Septiyani A, Zidan Afriansyah , Destri Muliastri, Ilham Azmy, Albert Daniel Saragih
Prediction of Airflow Velocity in Wind Tunnel Test Section Based on Blade Pitch Angle
This study was conducted in an open-circuit subsonic wind tunnel at the Aeronautics Hangar of Bandung State Polytechnic with the aim of obtaining the airflow velocity distribution in the test section and determining the blade pitch angle configuration that produces the greatest velocity. The wind tunnel has a total length of about 6 m with an octagonal test section measuring 40 cm x 40 cm x 155 cm and 7 cm chamfers at each corner. The research method involved numerical simulation using ANSYS and 3D modeling with Solidworks. Simulations were conducted at 500 RPM with blade pitch angles of 40°, 50°, 60°, and 70°. The results showed the highest speed at 50° blade pitch angle (16 - 18 m/s), with the lowest speed at 70° blade pitch angle (9 - 13 m/s). Tests at a blade pitch angle of 50° with variations in fan rotational speed (300 RPM, 500 RPM, and 700 RPM) also showed similar speeds (16.2 m/s at 500 RPM). It was found that the 50° blade pitch angle produced significant vortex strength which was influenced by the high airflow velocity. During the test, to improve the accuracy of airflow velocity measurement, it is necessary to ensure that all parts of the wind tunnel are closed.
wind tunnel, fluid computation, fan simulation, moving reference frame, test section
Copyright (c) 2024 Windy Maryani Pandiangan, Sugianto, Deden Masruri
Pengaruh Kuat Arus Dan Variasi Sudut Kampuh Pengelasan SMAW Pada Sambungan Pelat Baja AISI E 2512 Terhadap Ketangguhan Serta Uji Anova
Welding is a process of joining two metals where the metals become one due to heat with or without pressure. In this research, the welding process was carried out using a SMAW (Shield Metal Arc Welding) welding machine or electric arc welding using wrapped electrodes to determine the effect of seam type and current on toughness as well as an anova test. The base metal used is AISI E 2512 steel. The welding variables chosen are seam angles 600, 700, and 800, while the current variables used are 100A, 90A and 80A, then impact testing and anova tests are carried out. From the research results obtained. The highest impact strength is at a seam angle of 800 and a current of 100A, namely 1,802 joules/mm2, for the 700 seam angle group, the highest tensile strength value is 1,793 joules/mm2, while the lowest value is at a seam angle of 600, a current of 80A is 1,717 joules/mm2 and at Anova test shows that the mechanical properties of the weld will depend on the shape of the weld and the current chosen, so the seam angle and current strength have a significant influence on the impact strength or toughness of the steel..
SMAW welding, current, seam type, toughness, Anova.
Copyright (c) 2024 Markus Tato, Mangando, Suwarto, Harsman Tandilittin
Study of the Effect of Machining Parameter Variations on the Surface Roughness of AISI 1045 Steel Track Link Pins
The track link pin is an important part of the excavator undercarriage which often experiences wear due to continuous friction. Excessive load is often the cause of increased track link pin wear. Therefore, this research makes a replacement material for AISI 1045 steel excavator track link pins by varying the machining parameters using the Taguchi method. In this research, track link pins were made using a conventional lathe. The manufacturing process is carried out by varying nine combinations of machining parameters, namely cutting depth (a), cutting speed (Cs), and feed motion (f). Each parameter is organized into three factor levels. Determination of the variation values ​​of these parameters is carried out based on the maximum limit conditions of the machine and the specifications of the tools used. The research results show that there is an influence of machining parameters on surface roughness. The surface roughness of the original material of the track link pin is N9. Of the nine levels of machining parameter combinations, there is one combination that produces a surface roughness of N8 (NOT GOOD), so that 88.89% of this research is rated GOOD.
Copyright (c) 2024 Auliana Diah Wilujeng, Bayu Angriawan, Mohammad Anas Fikri
Studi Perbandingan Nilai Konduktivitas Termal Gypsum dan Sandwich Panel Sebagai Material Dinding Paint Dry Room
PT. XYZ is a company engaged in manufacturing guitar musical instruments. One of the processes in making guitars is the process of painting the guitar body which aims to give color to the guitar body and protect the guitar body from damage to external elements. After the painting, the guitar body must be dried at a certain temperature to get a nice and shiny color result. To fulfill these results, a paint dry room is needed to maintain a room temperature of 42.1°C - 42.5°C, but also does not have a heat impact on the outdoor environment. Currently, there is no standard wall material that can be used as a paint dry room wall. This study uses an experimental method to determine the thermal conductivity of gypsum and sandwich panels, then calculates the thermal conductivity and simulates a comparison with the software. The calculation result based on the thermal conductivity formula is that gypsum has a thermal conductivity of 0.059 [W/m°C] and a sandwich panel thermal conductivity of 0.142 [W/m°C]. This proves that gypsum has better insulating properties than sandwich panels. This study found that gypsum walls are more profitable to be used as paint dry room wall materials.
Copyright (c) 2024 Rizka Hazizah, Yudhi Chandra Dwiaji
Pengaruh Temperatur Temperring Pada Proses Heat Treatment Baja ST 60 Dengan Media Pendingin Oli Terhadap Kekerasan Dan Struktur Mikro
Steel that has been hardened is brittle and not suitable for use. Through the tempering process, the hardness and brittleness can be reduced until it meets the requirements for use. Hardness decreases, tensile strength will also decrease while the ductility and toughness of steel will increase. This research aims to determine the effect of tempering temperature in the heat treatment process of ST 60 steel with oil cooling media on hardness distribution and microstructure. The tempering process is carried out at temperatures of 500°C, 400°C, and 300°C with a hardening temperature of 950°C using Mesran SAE 40 Oil Quenching. The method used in this research is experimental research for the specimen is ST 60. The composition test results show that the material The base is included in the medium carbon steel group or medium carbon steel with a carbon content of 0.452%. Hardness testing used a Micro Hardness Tester where the hardness of the tempered specimen was 255.5, and the hardness of the hardened specimen was 189.7 which decreased. Microstructure testing shows that the microstructure of the raw material consists of ferrite and pearlite with balanced crystal shape and size according to the carbon content of 0.452
Hardening, Tempering, Quenching,. Hardness, Tensile strength, Steel ST.60
Copyright (c) 2024 Agus Hariyanto, Suwarto, Wajilan