NOZEL Jurnal Pendidikan Teknik Mesin最新文献

{"title":"Pengaruh Penggunaan Step Up Voltage Dan Variasi Bahan Bakar Terhadap Konsumsi Bahan Bakar Pada Motor Honda Beat","authors":"Ali Akbar Fillayati, D. Wijayanto, Ngatou Rohman","doi":"10.20961/nozel.v3i3.62968","DOIUrl":"https://doi.org/10.20961/nozel.v3i3.62968","url":null,"abstract":"The purpose of this study: (1) To investigate the effect of step up voltage on fuel consumption on Honda Beat motorcycles. (2) Investigating the effect of variations in the use of pertalite and pertamax fuels on the use of step up voltage on fuel consumption on Honda Beat motorcycles. (3) Investigating the best configuration on the use of Step Up Voltage on fuel consumption on a Honda Beat motorcycle. The research method used is descriptive investigation. The data obtained from the experimental results are entered into a table displayed in the form of a graph for later analysis. The descriptive research that will be used is a comparative study. The independent variables in this study: (1) The use of step up voltage (2) Variations in the use of pertalite and pertamax fuels (3) Variations in engine speed of 1500 rpm, 2000 rpm, and 2500 rpm. (4) Voltage variations are 13.7 V, 13.9 V, 14.1 V, 14.3 V, 14.5 V, and 14.7 V. The dependent variable in this study is fuel consumption under standard conditions and those who have used step-up voltage. The control variable used was a 2013 Honda Beat motorcycle and a 50 ml measuring cup. The results of this study: (1) The use of step up voltage affects the fuel consumption of Honda Beat motorcycles in 2013 because there is a difference in fuel consumption before using step up voltage and after using step up voltage. The use of this tool has been proven to be able to reduce fuel consumption by 0.87 ml/minute at 1500 rpm, with these results, the use of step up voltage affects the combustion quality of the fuel and air mixture in the combustion chamber of a motor vehicle which becomes more perfect due to a decrease the fuel consumption of the tested motor vehicle. (2) The use of Pertamax fuel can reduce fuel consumption. The average fuel consumption produced is 6.59 ml/minute, a decrease of 2.33 ml/minute from pertalite fuel. (3) The best configuration to obtain the lowest fuel consumption is to use a step up voltage with Pertamax fuel at a voltage of 14.3 V. This configuration is the best than the other configurations, with a fuel consumption of 3.76 ml/minute at 1500 rpm.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128573497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengaruh Penggunaan Set Up Voltage dengan Varian Bahan Bakar terhadap Torsi dan Daya Pada Motor Honda Beat","authors":"Misbah Alfi Yusrian, D. Wijayanto, Ngatou Rohman","doi":"10.20961/nozel.v3i3.62966","DOIUrl":"https://doi.org/10.20961/nozel.v3i3.62966","url":null,"abstract":"The purposes of this study are: (1) To determine the effect of using Step Up Voltage on torque and power of Honda Beat 2013 motorcycles. (2) To determine the effect of using Pertalie and Pertamax fuel variations on torque and power of Honda Beat 2013 motorcycles. (3) Knowing the best configuration of Step Up Voltage and fuel variations on the torque of the 2013 Honda Beat motorcycle. The research method used is experimental. The data of this research was obtained by measuring the sample of Honda Beat 2013 motorcycle. The independent variable was the use of Step Up Voltage with a voltage variation of 13.7 V to 14.7 V with a range of 0.2 V with Pertamax and Pertalite fuel. The dependent variable is the maximum torque of the axle and the maximum power of the axle which is measured using a dynamometer. The data obtained were then analyzed using a comparative descriptive technique by describing the data in the form of graphs, statistics and tables. From these data, a comparison is made between groups of data. The results of this study are: (1) The use of Step Up Voltage can increase the torque and power of the Honda Beat 2013 motorcycle. The largest increase in torque is at a voltage setting of 13.9 V with an average increase of 0.44 N.m from standard conditions. The average maximum power increase of the largest axle is at a voltage setting of 14.1 V, which is 0.30 HP from standard conditions. (2) The use of Pertamax fuel can increase the torque and power of the Honda Beat 2013 motorcycle. The average torque produced is 19.98 Nm, an increase of 0.26 Nm from pertalite fuel and produces an average power of 7.47 HP, an increase of 0.34. HP of pertalite fuel. (3) The best configuration is obtained from the use of a 13.9 V Step Up Voltage combined with Pertamax fuel. Torque increased by 0.44 N.m from standard conditions to 20.41 N.m and power increased by 0.20 HP from standard conditions to 7.67 HP","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126568162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Natural Weathering pada Komposit Recycled Polypropylene dan Serat Bambu","authors":"Arianti Ramadhani, Indah Widiastuti","doi":"10.20961/nozel.v3i3.62967","DOIUrl":"https://doi.org/10.20961/nozel.v3i3.62967","url":null,"abstract":"Abstract. The main objective of this study was to analyze the effect of Natural Weathering on the tensile strength and microstructure of recycled polypropylene (rPP) composites with bamboo fiber reinforcement. The rPP-bamboo composite specimens were made using extrusion molding and injection molding machines. The weight fraction used in making the specimens was 10% bamboo fiber and 90% rPP. The rPP-bamboo samples were tested with 3 variations of exposure time, 0 months (without exposure), 1 month and 2 months according to ASTM D1435-05 standard. From the 3 variations of exposure, a tensile test was carried out with the ASTM D638 type V standard to evaluate the value of tensile strength, modulus of elasticity and elongation. Then SEM (Scanning Microscopy Electrone) was performed to see the microstructure of the composite. The results showed that the tensile strength at exposure time of 0 months, 1 month and 2 months was 18.1 MPa with an elongation of 5%, 19.5 MPa with an elongation of 6.4% and 19.3 MPa with an elongation of 6.6%. Young's modulus values showed a decrease with increasing exposure time, ranging from 222 MPa in the sample without exposure to 141 MPa at an exposure time of 2 months. With SEM it is known that, the microstructure of the composite at the beginning of exposure shows a strong bond between the fiber-matrix even though there are some voids in the specimen. At 2 months of exposure, it was seen that there was a gap between the matrix and bamboo due to the hydrophilic nature of bamboo fiber.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134466216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penggalian Data Bengkel Untuk Basis Data Awal Aplikasi Mybengkel Menggunakan Location Based Service","authors":"R. H., Nugroho Agung Pambudi, Yuyun Estriyanto","doi":"10.20961/nozel.v1i1.63589","DOIUrl":"https://doi.org/10.20961/nozel.v1i1.63589","url":null,"abstract":"Abstract: Motorcyclists and cars have difficulty finding a repair shop when it breaks down on the road, because of the lack of information on the location of the workshop around. In the end, it raises the need for vehicle users to find out information about the workshop and the location of the workshop. The purpose of this study is to present data on the operational characteristics of the workshop. This study uses a quantitative survey method. Collecting data in this study using a questionnaire with a resource person, namely the owner of the workshop. The research instrument was compiled in the form of a questionnaire that had been tested for instrument validity by experts. The results of the questionnaire data obtained from the respondents were then tabulated using Microsoft Excel into a bar chart. This study took a sample of 70 workshops in Solo Raya. The results of this study indicate that the average operating hours of workshops in Solo Raya are at 08.00 WIB. The average closing hours for workshop operations in Solo Raya is 16.00 WIB. The types of workshops are divided into 2, namely general workshops there are 62 workshops while specialist workshops have 8 workshops. The average type of workshop work that can serve consumers is light service. There are 43 mechanics who can be called out of the workshop, while 27 workshops cannot be called out. The average number of mechanics for motorcycle and car repair shops in Solo Raya is 1 and 2 mechanics. The average estimated cost of a light motorcycle service is Rp. 30,500, the average estimated service cost for motorbikes is Rp. 136,500, the average estimated cost of a light car service is Rp. 175,500, the average estimated service cost for the weight of the car is Rp. 1,987,500, the average estimated cost of motorcycle tires is Rp. 10,200, the average estimated cost of washing a motorbike is Rp. 22,500, the average estimated cost of body repair is Rp. 300,000, the average estimated cost of repairing the dynamo is Rp. 550.000, the average estimated cost of car AC service is Rp. 125,000, the average estimated cost of repairing a car radiator is Rp. 300,000, the average estimated cost of car carburetor service is Rp. 187,500, and the estimated average cost of a chassis specialist is Rp. 375,000.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"198200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115187020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementasi Pengetahuan, Persepsi, Dan Penerapan Kesehatan Dan Keselamatan Kerja (K3) Pada Pembelajaran Praktik Program Keahlian Teknik Pemesinan Dan Teknik Ototronik Di SMK Negeri 2 Karanganyar","authors":"Tomy Adam, Husin Bugis, Ngatou Rohman","doi":"10.20961/nozel.v1i1.63595","DOIUrl":"https://doi.org/10.20961/nozel.v1i1.63595","url":null,"abstract":"Abstract               This study aims to determine the level of knowledge, perception, and application of Occupational Health  and Safety(OHS) in class XII students of the Mechanical Engineering and Autotronic Engineering expertise program. This research used descriptive quantitative research methods. Retrieval of data using test instruments and questionnaires. The population of this study was 135 students of class XII,  67 students of mechanical engineering and 68 students of autotronic engineering.              The results showed that the level of OHS knowledge of class XII students of Mechanical Engineering, 76.12%, was in the good category, 19.40% was good enough and was 4.48% not good enough. Meanwhile, in class XII,  Autotronic Engineering which was included in the good category was 75%, 17.65% was good enough, and 7.35% was not good. The highest average gain lies in the OHS Terms and Principles indicator, namely for the engineering department, 98.51% of students are in the good category and 98.53% for the auto-electronics department, 98.53% of the students are in the good category.For the level of student perception, in class XII Mechanical Engineering which is in the good category is 95.52%, 4.48% is quite good, and there are no students in the poor category. Meanwhile, the level of students' perceptions in class XII of Autotronic Engineering  which was in the good category was 98.51%, 2.99% was quite good, and no student was in the poor category. The highest average gain lies in the OHS Terms and Principles indicator, namely for the engineering department, 98.51% of students are in the good category and 98.53% for the auto-electronics department, 98.53% of the students are in the good category.For the level of application, the highest percentage of students in mechanical engineering always did 72.14%, sometimes 26.37% and students did not do 1.49%. Meanwhile, there were 70.59% of students in autotronic engineering who always did it, 27.94% of the students did sometimes, and 1.47% did not. The highest average gain lies in the indicators of cleanliness and health of the work environment where for the engineering department, 72.14% of students always apply OHS measures. Meanwhile, for the autronic department, 70.59% of students always apply OHS actions.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121990252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Indikator Proses Pembelajaran Praktek Pengelasan Di SMK","authors":"Muhamad Dwi Ariyanto, Yuyun Estriyanto, Budi Budi Harjanto","doi":"10.20961/nozel.v1i1.63578","DOIUrl":"https://doi.org/10.20961/nozel.v1i1.63578","url":null,"abstract":" Abstract The objectives of the study are: (1) to find the indicators of welding teaching and learning process which is appropriate to the characteristics of welding ability, (2) to know the ideal magnitude of every indicator in qualified SMAW welding teaching and learning process.The approach of the survey which is used in this research is the combination of qualitative and quantitative with sequential exploratory model of descriptive method. The first step applied is qualitative method and the second step is quantitative method. The technique of collecting data were interview and questionnaire. The respondents of the study was chosen by certain consideration.The results of the study are: (1) the indicators of welding process in teaching and learning practice are teaching and learning model, students’ character, physical condition, psychological condition, duration of the practice session, and teaching and learning practice frequency. (2) Satisfied result was found when the teaching and learning held once in a week, one meeting is 8 teaching hours. (3) The material delivery within 16 meetings is enough to be understood by students. (4) The mastering position of welding is ideally for 1G or 1F needs 3 meetings, 2G or 2F needs 5 meetings, and 3G or 3F needs 8 meetings. (5) 16 meetings for welding teaching and learning practice is not enough to master the SMAW welding competency.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124800989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studi Perbandingan Bahan Bakar Minyak Dengan Bahan Bakar Gas LPG (Liquified Petroleum Gas) Terhadap Konsumsi Bahan Bakar Sepeda Motor 4 Tak 125 CC","authors":"Windia Pebrianto, Husin Bugis, Ranto , Ranto","doi":"10.20961/nozel.v3i4.63124","DOIUrl":"https://doi.org/10.20961/nozel.v3i4.63124","url":null,"abstract":"Liquified Petroleum Gas is a gaseous hydrocarbon produced from gas and oil with the main components being propane and butane. The use of LPG gas fuel was chosen because it is able to reduce the amount of fuel consumption by up to 30% more efficient than fuel oil in general. The use of LPG fuel can be optimized by modifying the size of the pilot jet, the size of the main jet and the gas flow valve opening on the regulator. The purpose of this study was to investigate how big the ratio of fuel consumption between LPG fuel and pertalite fuel is. This study used Honda Supra 125 D as a sample. The variables used in this study include: variations in the size of the pilot jet (40, 42, 45), variations in the size of the main jet (72, 98, 120) and the gas flow valve opening on the regulator (10%, 15%, 20%). The results showed that the lowest LPG fuel consumption value was obtained at 156.5 grams per 10 kilometers, while the pertalite fuel consumption value was obtained at 232.9 grams (after converting from liters to grams). The most influential factor is the replacement of the main jet size on the use of LPG fuel.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125973842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluasi Kinerja Lulusan Program Studi Pendidikan Teknik Mesin Universitas Sebelas Maret Di Dunia Kerja","authors":"Agus Hardika, Yuyun Estriyanto, I. Widiastuti","doi":"10.20961/nozel.v3i4.63018","DOIUrl":"https://doi.org/10.20961/nozel.v3i4.63018","url":null,"abstract":"Evaluation of the performance of study program graduates in the world of work is one indicator of higher education quality. The high performance of graduates and their relevance to the needs of the world of work indicate a good quality higher education. The purpose of this study is to evaluate the performance of graduates of Sebelas Maret University Mechanical Engineering Education (PTM UNS) in the world of work. So that the results obtained as a priority reference for learning development in study programs and students. This research is quantitative descriptive. It is carried out through a tracer study of graduate data and a survey of graduate users. The subjects of this research include UNS PTM graduates who graduated in 2016, 2017 and 2018 as a source of tracking data for graduates and 80 graduate users as a source of satisfaction survey data and the level of importance of the formulated Graduate Learning Outcomes (CPL). Data collection techniques were carried out through the method of filling out the questionnaire instrument questionnaire. The analysis was carried out using quantitative descriptive statistical analysis techniques using the SPSS V.21 data processing application. The results of this study show profile data for PTM UNS graduates, namely the average graduate with a very satisfactory predicate (GPA 3.46) with an average study period of 4 years and 2 months. Most (56%) work as educators, with a high level of suitability of work with the field of science 47.5%; 38.9% moderate and the remaining 13.6% low. The average waiting time for the first job after graduation is less than 6 months (76.5%). Furthermore, for the results of the graduate user satisfaction survey, the average total satisfaction is 4.28 (very satisfactory). With an importance level of 12 Graduate Learning Outcomes (CPL), 11 of them are in the very important category and one is in the important category (T8). Objectively, users are satisfied with the performance of graduates, but subjectively researchers need to propose development priorities for study programs based on the value of the level of satisfaction which is below the total average value. The conclusion in this study shows that the performance of graduates of the PTM UNS study program has been good or satisfactory. However, there is a need for a program to improve the quality of graduate performance in the communication and professional aspects. It is hoped that the study program will be able to improve the quality of these two aspects through improving the quality of learning, infrastructure and learning facilities as well as improving the quality of educators/lecturers.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"41 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125708959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengaruh Variasi Jumlah Sudu Dan Jarak Sudu Dengan Saluran Keluar Terhadap Daya Output Listrik Turbin Vortex","authors":"Yusron Nur Faizal, D. Wijayanto, Yuyun Estriyanto","doi":"10.20961/nozel.v3i4.63123","DOIUrl":"https://doi.org/10.20961/nozel.v3i4.63123","url":null,"abstract":"Hydroelectric power is one of the options in utilizing renewable energy. The generators that are made usually use waterfalls. Low water flows such as rivers have not been utilized optimally. This becomes a reference for utilizing river flow by turning it into a whirlpool or vortex flow. This study analyzes the effect of variations in the number of blades and the distance between the blades and the outlet on the electrical output power of a vortex type water turbine. The research method used is experimental. The independent variables are variations in the number of blades 2, 3, and 4 and variations in the distance between the blades and the outlet 4 cm, 6 cm, 8 cm, and 10 cm. The dependent variable of the research is the output power and efficiency of the vortex type water turbine. Data analysis techniques using quantitative descriptive analysis techniques. The results showed that the maximum data for calculating the electrical output power and efficiency with a water discharge of 6.34 L/s was obtained at the number of blades 4 and the distance between the blades and the outlet 6 cm, namely 9.72 Watt and 65.77%. Based on these results indicate that the more the number of blades, the higher the electrical output power produced. Meanwhile, the variation of the distance between the blade and the outlet increases at a height of 6 cm and relatively decreases at a height of 8 cm and 10 cm.","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128122015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studi Penelitian Panjang Kritis Serat Alam Dengan Perlakuan Perendaman Natrium Hidroksida","authors":"Rangga Yanuarestu Ramadhan, Yuyun Estriyanto, Budi Harjanto","doi":"10.20961/nozel.v3i4.63009","DOIUrl":"https://doi.org/10.20961/nozel.v3i4.63009","url":null,"abstract":"The purpose of this study was to determine the critical length of palm fiber, kenaf fiber, pineapple fiber, agave fiber, and coconut fiber with NaOH immersion treatment. This study was determine the effect of NaOH immersion treatment on the critical length of fiber. This research is an experimental exploratory research. The independent variables in this study were palm fiber, kenaf fiber, pineapple fiber, agave fiber, and coconut fiber with the dependent variable is the critical fiber length. To find the critical length of fiber using single fiber tensile test and single fiber pull out test. The data obtainde from the test results are then analyzed using formula equation to determine the critical length of each fiber. Data analysis techniques using quantitative descriptive analysis techniques. The results showed that the critical length of palm fiber, kenaf fiber, agave fiber, and coconut fiber with NaOH immersion treatment was shorter than the critical length of fiber without NaOH immersion treatment. Agave fiber has the shortest critical fiber length. The critical length of the fiber with NaOH immersion treatment are palm fiber 4.6 mm, kenaf fiber 5.4 mm, pineapple fiber 3.6 mm, agave fiber 2.2 mm, and coconut fiber 3.0 mm. ","PeriodicalId":233393,"journal":{"name":"NOZEL Jurnal Pendidikan Teknik Mesin","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128536101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}