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Nozel : Jurnal Pendididikan Teknik Mesin
Published by Universitas Sebelas Maret
ISSN : -     EISSN : 2656713X     DOI : https://doi.org/10.20961/nozel
Core Subject :
NOZEL : Jurnal Pendidikan Teknik Mesin is a national forum for the publication and dissemination of original work which contributes to greater scientific understanding of the main disciplines underpinning the mechanical engineering and vocational education. This international journal is dedicated to the latest advancements in mechanical engineering and vocational education. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of mechanical engineering and vocational education. This journal is published in the online journal, which publishes research articles, reviews, and letters in all areas of mechanical engineering and vocational education. It is a blind peer-reviewed journal, aims to provide the most complete and reliable source of information on current developments in the field. The emphasis will be on publishing quality papers rapidly and available to researchers worldwide.
Arjuna Subject : -
Articles 158 Documents
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ANALISIS KESIAPAN MENGHADAPI DUNIA KERJA SETELAH PRAKTIK INDUSTRI MAHASISWA PENDIDIKAN TEKNIK MESIN FKIP UNS Kasanah, Addin Nur; Akhyar, Muhammad; Rohman, Ngatou
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 4 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i4.42467

Abstract

The aims of this study are (1) to describing the work readiness of Mechanical Engineering Education students of Sebelas Maret University in dealing with the industrial sector after carrying out industrial training in terms of each indicator; (2) to describing the highest and lowest indicators of work readiness of industrial sector after industrial training owned by Mechanical Engineering Education students of Sebelas Maret University. The population in this study were all of Mechanical Engineering Education students who had carried out industrial training. The selected samples were 99 students of Mechanical Engineering Education. Instrument validity and reliability tests were carried out on 30 UNS Mechanical Engineering Education students who had carried out industry training and were chosen randomly. The results of the instrument validity test resulted in 51 valid statement items and 16 invalid statement items of 67 instrument items. Instrument reliability test used IBM SPSS Statistics version 21, this test resulted that the reliability value of 0.935. The results of the study revealed that work readiness of Mechanical Engineering Education students of Sebelas Maret University  in terms of the overall indicators in the medium category. The highest category of work readiness indicator of Mechanical Engineering Education students is on emotional indicator with a value of 20,7%. The lowest category of work readiness indicator of Mechanical Engineering Education students is on skill indicator with a value of 20,7%.
Analisis Perbandingan Efisiensi Kinerja Mesin Pencacah Rumput 6.5 Hp dan 5.5 Hp menggunakan 4 Mata Pisau Sripratama, Eki; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 8, No 2 (2026)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v8i2.117552

Abstract

This study aims to analyze the comparative performance efficiency of grass chopper machines powered by 6.5 Hp and 5.5 Hp using four blades under constant rotational conditions of approximately 2300 rpm. The research employed an experimental method with a comparative design. Data were collected through direct testing of both machines, focusing on effective capacity, fuel consumption, time efficiency, and chopping quality. Each test was repeated five times using measuring instruments including a scale, stopwatch, measuring cup, and ruler. The results show that the 6.5 Hp machine achieved a higher average effective capacity of 196.27 kg/h and time efficiency of 3.26 kg/min compared to the 5.5 Hp machine, which produced 194.7 kg/h and 3.24 kg/min. However, the 5.5 Hp machine demonstrated better fuel efficiency at 0.066 liters/kg, while the 6.5 Hp machine consumed 0.080 liters/kg. The chopping quality of both machines was relatively uniform with no significant differences observed. These findings indicate that engine power affects capacity and working speed, while lower power engines tend to be more fuel efficient. Therefore, machine selection should consider operational needs, scale of use, and fuel efficiency.
STUDI KESIAPAN MAGANG INDUSTRI (MI) MAHASISWA PROGRAM STUDI PENDIDIKAN TEKNIK MESIN FKIP UNS Rohman, Ngatou; Saputro, Herman
Nozel : Jurnal Pendididikan Teknik Mesin Vol 5, No 1 (2023)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v5i1.72282

Abstract

The FKIP UNS Mechanical Engineering Education study program is one of the clusters in vocational education that produces vocational teacher candidates. To equip the competencies required to become a SMK teacher in the field of Mechanical Engineering and Automotive Engineering, it is necessary to gain experience in the industry. Industrial Internship is one of the subjects that must be taken by students of the Mechanical Engineering Education Study Program FKIP UNS as a graduation requirement. To examine the extent to which students carry out industrial apprenticeship programs in terms of the aspects of students and study programs, it is necessary to conduct research on the analysis of Industrial Internship readiness of students of the Mechanical Engineering Education Study Program FKIP UNS which can then be used as a basis for making policies regarding industrial apprenticeships. The design in this research is descriptive quantitative. The data collection technique was carried out in a survey using a questionnaire. The respondents in this study were all students of the Mechanical Engineering Education Study Program FKIP UNS class of 2020 or semester IV who will carry out the Industrial Internship program in 2022. The research data were analyzed descriptively with the help of the SPSS program. The results showed that 1) the readiness for industrial internships for students of the Mechanical Engineering Education Study Program FKIP UNS class of 2020 was 3.93 which was in the good category. 2) in providing industrial apprenticeship services for students, the Mechanical Engineering Education study program FKIP UNS makes an industrial apprentice manual and appoints an industrial apprentice coordinator.
ANALISIS PENGARUH DAYA, TINGKAT KEBISINGAN, DAN TORSI SEPEDA MOTOR 4 TAK PADA PENGGUNAAN KNALPOT DENGAN BUSI RACING DAN MODEL FREE FLOW Akhya, Ridho; Bugis, Husin; Basori, Basori
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 2 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i2.31412

Abstract

The objective of this study to specify the effect of the use of model variation free flow exhaust and spark plug racing against torque, power and the noise level generated. This research is descriptive quantitative experimental method. The sample used is the Supra X motorcycle 125d which uses exhaust components and the plugs are standard. Data obtained from the measurement of torque, power and noise levels using a tool Sportdyno V3.3 and Sound Level Meter to perform replacement treatment models as well as the free flow exhaust racing spark plugs compared to standard conditions. The research show that use of exhaust and spark plugs have signification variations were tested. Of all the test results obtained torque decreases from all experimental treatments. Lowering the lowest torque obtained on the use variations of free flow exhaust and spark plug racing. At the same usage also generated the increase in power and the noise level of the most significant.
UJI EKSPERIMEN PENGARUH JUMLAH SUDU DAN DEBIT TERHADAP DAYA DAN EFISIENSI TURBIN AIR TIPE VORTEX Kurniawan, Miftakhul Na'im; Estriyanto, Yuyun; Wijayanto, Danar Susilo
Nozel : Jurnal Pendididikan Teknik Mesin Vol 6, No 4 (2024)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v6i4.62763

Abstract

The electrification ratio in Indonesia is currently still 87%. This means that there are still 8.5 million residents or the equivalent of 2500 villages that have not received electricity. Indonesia has a lot of potential for renewable energy such as water energy. 7 GW capacity from renewable energy, 66% of which comes from hydropower. The manufacture of pico-hydro scale power plants can be a cheap alternative. Pico-hydro can be applied to irrigation canals so that it can produce small-scale electrical energy. One type of water turbine that can be utilized is a vortex type water turbine. The study used experimental methods. The independent variables are variations in the number of blades 2, 4, and 6 and the distance between the blades and the outlet is 1 cm. The dependent variable of the research is the power and efficiency produced by the vortex water turbine. The data analysis technique in this study used quantitative descriptive analysis techniques. The basin used is a conical basin type with the upper diameter is 40 cm, the lower/oulet diameter is 6.5 cm, and the height is 32 cm. The water discharge in this test has 7 variations, that is 1,12 l/s, 1,26 l/s, 1,54 l/s, 1,68 l/s, 1,82 l/s, 1,96 l/s, and 2,11 l/s. This test produced the highest electrical output power of 9.66 Watts, at a total of 2 blades, the discharge is 1,86 l/s. At the number of blades 6 at a discharge of 1.96 l / d is the highest efficiency value of 6.3%.
Pengaruh Variasi Jumlah Sudu Dan Jarak Sudu Dengan Saluran Keluar Terhadap Daya Output Listrik Turbin Vortex Faizal, Yusron Nur; Wijayanto, Danar Susilo; Estriyanto, Yuyun
Nozel : Jurnal Pendididikan Teknik Mesin Vol 3, No 4 (2021)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v3i4.63123

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.
HUBUNGAN KONSEP DIRI DAN KEMANDIRIAN BELAJAR DENGAN KESIAPAN KERJA SISWA KELAS XI SMK NEGERI 2 PENGASIH Aditiya, Aditiya
Nozel : Jurnal Pendididikan Teknik Mesin Vol 3, No 2 (2021)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v3i2.52117

Abstract

The purpose of this research are to finds: (1) the relationship of self concept with work readiness of the 11st class student in SMK Negeri 2 Pengasih, (2) the relationship of self regulated learning with work readiness of the 11st class student SMK Negeri 2 Pengasih, and (3) the relationship of self concept and self regulated learning with work readiness of the 11st class student SMK Negeri 2 Pengasih. The hypothesis of this research are: (1) true positive and significant relationship between self concept with work readiness of the 11st class student SMK Negeri 2 Pengasih, (2) true positive and significant relationship between self regulated learning with work readiness of the 11st class student SMK Negeri 2 Pengasih, and (3) true positive and significant together relationship between self concept and self regulated learning with work readiness of the 11st class student SMK Negeri 2 Pengasih. The kind of this research is ex-postfacto. The population of this research are 502 students. The method of sample taking over use Slovin formula with 5% significant level so that it got 222 sample member. The technics of sample taking over have done according to precipitate (Simple Random Sampling). The result of this research analyzed with product moment correlation analyse technics for first and second hypothesis, and double analyse technics for third hypothesis. Before hypothesis test have done, firstly do analyse condition test that used normalitas test, linieritas test, and multikolinieritas test. The result of the research show that: (1) directly, self concept has positive and significant relationship with work readiness of the 11st class student SMK Negeri 2 Pengasih that shown with 0,601 correlation coefficient (rx1,y), where 0,601 rhitung > 0,138 rtabel on 5% significant level, (2) directly, self regulated learning has positive and significant relationship with work readiness of the 11st class student SMK Negeri 2 Pengasih that shown with 0,679 correlation coefficient (rx2,y), where 0,679 rhitung > 0,138 rtabel on 5% significant level, and (3) together, self concept and self regulated learning has positive and significant relationship with work readiness of the 11st class student SMK Negeri 2 Pengasih that shown with 0,674 Rhitung and 132,54 Fhitung > 3,04 Ftabel on 5% significant level. That’s means if the self concept and self regulated learning more high so the work readiness high too, likewise the opposite if the self concept and self regulated learning more low so the work readiness low too
ANALISIS POTENSI ANGIN DI KECAMATAN JATEN KABUPATEN KARANGANYAR BERBASIS INTERNET OF THINGS (IoT) Adiputra, Reynaldi Fajar; Saputra, Taufik Wisnu; Wijayanto, Danar Susilo
Nozel : Jurnal Pendididikan Teknik Mesin Vol 5, No 3 (2023)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v5i3.77034

Abstract

Penelitian ini bertujuan untuk mengidentifikasi rekomendasi turbin angin yang sesuai untuk pengukuran berdasarkan potensi angin di Kabupaten Jaten. Penelitian ini menggunakan metode eksperimen. Sumber data untuk penelitian ini meliputi pengukuran kecepatan dan arah angin yang diperoleh menggunakan mikrokontroler berbasis IoT. Purposive sampling digunakan untuk mengumpulkan sampel. Alat yang digunakan untuk pengambilan data terdiri dari anemometer untuk mengukur kecepatan angin dan wind vane untuk menentukan arah angin. Data dianalisis secara deskriptif dan kuantitatif. Hasil kajian menunjukkan kecepatan angin rata-rata tertinggi teramati pada ketinggian 10 meter Di Kabupaten Jaten kecepatan angin rata-rata 0,47 m/s, dengan kecepatan tertinggi 3,38 m/s. Arah angin dominan bertiup dari Tenggara ke Barat. Potensi angin di daerah ini tidak cukup tinggi untuk dimanfaatkan secara efektif sebagai sumber energi angin yang signifikan karena besarnya yang rendah. Dalam konteks Kabupaten Jaten, kincir angin Savonius vertikal direkomendasikan untuk memanfaatkan kecepatan angin rendah. Jenis turbin Savonius yang dapat digunakan seperti turbin Savonius tipe Helical 2 bilah dengan end plate memiliki kecepatan potong 1,906 m/s dan turbin Savonius tipe S 2 bilah dengan penambahan 4 sirip memiliki kecepatan potong 1,8 m/s.
PENGARUH VARIASI UKURAN DIAMETER LUBANG MAGIC RING PADA EXHAUST MANIFOLD TERHADAP TORSI DAN DAYA SEPEDA MOTOR YAMAHA VEGA RR Yazid, Muhammad Mirwan; Ranto, Ranto; Bugis, Husin
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 3 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i2.43247

Abstract

Vehicle performance will decrease with increasing age of use, it can be seen from the weakening initial torque and the power of the vehicle when driving unlike the initial production. Magic ring a tool produced by CV. SUMI INOTECH which utilizes the overlapping process of valves. The magic ring mounted on the header exhaust manifold serves to restore exhaust gas that is wasted from the overlapping process to return to the combustion chamber so as to produce more power to push the piston and the performance of the vehicle will increase. This study used an experimental method with the research object of Yamaha Vega RR in 2014. The magic ring used was the 16 mm magic ring serial number (ASJS032125) and the same magic ring but the inner diameter was enlarged to 18 mm. Using descriptive quantitative data analysis, it was found that the use of the magic ring added torque from the standard condition of 7.42% in the use of the 16 mm magic ring and increased by 7.12% in the use of the 18 mm magic ring. The power of the vehicle increased only 0.24% when using the magic ring 16 mm, and the use of the magic ring 18 mm power remained the same as the standard condition.
Pengaruh Program Praktik Kerja Terhadap Pilihan Jenjang Karir Program Keahlian Teknik Otomotif SMK N 2 Surakarta Aiman, Muhammad Rosyiq; Rohman, Ngatou
Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 3 (2025)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v7i3.111041

Abstract

Career planning is a critical component for Vocational High School (Sekolah Menengah Kejuruan or SMK) students to ensure their readiness to enter the professional world. As the job market becomes increasingly competitive, students need to be equipped not only with technical knowledge but also with the ability to align their interests, talents, and capabilities with the demands of the industry. Research has shown that students with well structured career plans demonstrate greater confidence, clarity, and competence in making career-related decisions. This study aims to examine the influence of the Industrial Work Practice program on the career development of students enrolled in the Automotive Engineering program at SMK N 2 Surakarta. The program provides students with firsthand industry experience, allowing them to acquire practical skills, improve problem-solving abilities, and enhance their motivation to pursue relevant career paths. To ensure the validity of the research findings, a series of instrument testing procedures were applied, including tests for validity, reliability, normality, linearity, and heteroscedasticity. These steps were crucial in confirming that the data accurately represented the variables under study. Hypothesis testing was carried out using both F-tests and t-tests to determine the individual and collective effects of the Field Work Practice program on students' career choices. The results showed a statistically significant impact of the program on students’ career readiness, particularly in terms of their engagement in the program, the competencies they developed during the practice, and their career motivation.

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