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All Journal NOTARIUS JIPTEK : Jurnal Ilmiah Pendidikan Teknik dan Kejuruan Jurnal Nagara Bhakti: Jurnal Pengabdian Kepada Masyarakat Jurnal Mekanikasista Nozel : Jurnal Pendididikan Teknik Mesin Folia Medica Indonesiana
Budi Harjanto
Universitas Sebelas Maret Surakarta
Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health Social Sciences Transportation Other

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PENGARUH VARIASI PENAMBAHAN FLY ASH & BENTONIT TERHADAP SIFAT PASIR CETAK DAN CACAT GASHOLES PADA HASIL PENGECORAN LOGAM ALUMINIUM Bahrudin, Faqih; Harjanto, Budi; Saputro, Herman
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (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.v1i2.30430

Abstract

The objectives of this study to describe: (1) The effect of adding fly ash and bentonite to the permeability of molding sand. (2) The effect of adding fly ash and bentonite to the moisture of molding sand. (3) The effect of adding fly ash and bentonite to gasholes defect on aluminium metal casting. This study is conducted at Polytechnic of Manufaktur Ceper, Klaten. The method that used is pre-experimental design which one-shot case study design. The compositions of the molding sand are varied is fly ash and bentonite. The Sample variations are divided into 4 types based on fly ash and bentonite concentration. The comparison of fly ash and bentonite concentration are: variation A are 0%:9%, variation B are 1%:8%, variation C are 2%:7%, and variation D are 3%:6%. The tests which is done in this study such as permeability test by using permeability tester, moisture test by using moisture tester, and gaholes defect test by using visual observation and calculation of gasholes defect.The results showed that: (1) The adding fly ash and bentonite can decreased the permeability values of molding sand. The lowest permeability values occur at variation D that is 85.34 cm3/min. (2) The adding fly ash and bentonite can decreased the moisture of molding sand. The lowest moisture values occur at variation D that is 5,26 %. (3) The adding fly ash and bentonite can improved the quality of castings. The results of castings at variation B which adding fly ash and bentonite has less gasholes defects compared with variation which no adding fly ash that is 3,15 cm3
Analisis Persepsi Siswa Tentang Pengaruh Kelengkapan Fasilitas Bengkel Sekolah Terhadap Tingkat Kesiapan Kerja Siswa SMK Bhina Karya Karanganyar Bantara, Maulana Arbi; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 4 (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.v7i4.115213

Abstract

   This study aims to determine the positive and significant effect of students' perceptions of the completeness of school workshop facilities on the work readiness level of Grade XII students majoring in Light Vehicle Engineering at SMK Bina Karya Karanganyar. This study uses a quantitative approach with a descriptive research design. In this study, the independent variable (X) is the completeness of school workshop facilities, while the dependent variable (Y) is the level of student work readiness. The sample used in this study consisted of 70 students from Class XII TKR 1 and XII TKR 2 at SMK Bhinneka Karya Karanganyar in the 2025/2026 academic year. Data were collected using a Likert scale. The results showed that the completeness of school workshop facilities had a positive and significant effect on the level of work readiness of students in Grade XII of the Light Vehicle Engineering Department at SMK Bina Karya Karanganyar. This was proven by the t-test results with a t-value of 4.077 and a significance of 0.000 (< 0.05). The results of the coefficient of determination test show that the completeness of school workshop facilities contributes 19.6% to student work readiness, while the rest is influenced by other factors outside this study. Thus, the better the completeness of school workshop facilities, the higher the students' work readiness.
PENGARUH KUAT ARUS PADA PENGELASAN PADUAN ALUMINIUM 6061 DENGAN MENGGUNAKAN METODE LAS TIG TERHADAP KEKERASAN DAN STRUKTUR MIKRO Wicaksono, Rochim Toat; Suharno, Suharno; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (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.v1i1.28484

Abstract

The objective of research was to find out the effect of current on microstructure and hardness value in Aluminium Alloy 6061 before (raw material) and after welding using Tungsten Inert Gas (TIG) welding method with filler rod ER4043. This research uses experiment methods. Technique of analyzing data used was a descriptive comparative research. The instruments used for testing microstructure and hardness were Olympus Metallurgical Microscope and Vikers Hardness Tester. Base on the result of research, it could be concluded that the result of microstructure testing showed the reduced Mg2Si phase width after welding. In raw material, the Mg2Si phase seemed to diffuse surrounding the α-Al phase surface, but the result of welding using TIG welding method with current of I00 A, 110 A, and 115A showed that Mg2Si phase reduced in each specimen, so that α-Al phase was very dominant. The hardness value of hardness result showed the different hardness level. The specimen with current of 110A had higher hardness level of 65.4 VHN than the specimen with current of 100 A (55.7 VHN) and 115 A (55.9 VHN). The result of hardness testing on raw material was 120.4 VHN. This research showed that the welding using varying current changed microstructure and affected the hardness value of Aluminum Alloy 6061.
PENGARUH UNSUR MAGNESIUM DAN HEAT TREATMENT PADA PERFORMA PISTON DARI VELG ALUMINIUM DENGAN ADC 12 Ulya, Amin Hakim Nur; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 2 (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.v2i1.43229

Abstract

Aluminum alloy is one of the non ferrous metals that are widely used in various fields of life including one of the automotive industry. In Indonesia, the automotive industry is currently experiencing rapid development, as indicated by the number of motorized vehicles.there are many aluminium scrap from velg those are not used intensively, so casting is done through the use of aluminium velg. To prevent damage to the piston and to approach the standard, its hardness needs to be increased, namely by adding magnesium by 0.3% and 0.6% as well as artificial aging heat treatment method at a temperature of 155 ˚C with a variation of holding time used are 2 hours and 4 hours. The original piston has a hardness value 87.5 VHN. It turns out that aluminum velg material has a chemical composition of silicon element (Si) of 12.9% which is not in accordance with the A333.0 standard, so it is necessary to add the ADC 12 in casting to make new piston material. Based on the A333.0 standard, the suitable composition is 75% ADC 12 + 25% aluminum velg with a hardness value is 83.2 VHN, but still below from the original piston hardness. After the addition of magnesium and artificial aging the hardness of the new piston material has increased. The hardness of the material is 75% ADC 12 + 25% aluminum velg which has a hardness over the original piston is a material with artificial aging 4 hours with a hardness value is 87.6 VHN, material with the addition of magnesium elements 0.3% and 0.6% as well as artificial aging 4 hours which had a violence value are 88.6 VHN and 90.2 VHN. The process of adding magnesium and artificial aging also affects the metallography of the material, namely the structure and shape of the microstructure becomes more organized and there is a change in grain size.
KUALITAS REPAIR WELDING MENGGUNAKAN METODE PENGELASAN TIG DENGAN PERLAKUAN PREHEATING DAN POST WELD HEAT TREATMENT PADA CAST WHEEL ALUMINIUM Siwi, Dewi Rima Ratri; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 3 (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.v2i3.42453

Abstract

The Purpose of this research are to know chemical composition, find micro structure, find impact strength, find speciment’s hardeness level on allumminium cast wheel before and after Tungsten Inert Gas welding. The speciment on this research is aluminum cast wheel or aluminum velg. The data analysis on this research is a comparative descriptive method, that the observation result is analyzed by description. And then compare the observation result between the data before TIG welding or before conducted preheating and PWHT. The parameter of analyze data are included: the testing of chemical composition, microstructure, hardness and impact. Based on the result of this research, it can be concluded that the cast wheel material is aluminum type cast alloy AA.445.2 which has non-heat treatable characteristic. The research results show that the microstructure of Al grain in the HAZ region fused with primary aluminum (α-Al) and grain Si alloy formed between the primary α-Al. The impact strength value on the welded speciment is higher than impact strength value before welding those are 0.0616 J/mm2 and 0.0384 J/mm2. Hardeness level on the speciment before welding processes is 103,381 VHN. The number is higher than after on the welding area, the hardeness level is lower too that is 44,051 VHN, whereas the hardeness level an the HAZ is a 37,943 VHN and 35,465 VHN on the base material.
Pengaruh Jenis Pasir Gunung Dan Pasir Pantai Dengan Menggunakan Uji Alir Spiral Terhadap Karakteristik Hasil Pengecoran Aluminium Hidayat, Faras Nur; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 4 (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.v7i4.105838

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan dua jenis pasir cetak, yaitu pasir gunung dan pasir pantai, terhadap hasil pengecoran logam aluminium ditinjau dari aspek fluiditas, kekerasan, dan struktur mikro. Metode penelitian yang digunakan adalah eksperimen dengan desain faktorial, di mana spesimen aluminium dicetak menggunakan media pasir gunung dan pasir pantai dengan variasi suhu penuangan 750 °C, 800 °C, dan 850 °C. Uji fluiditas dilakukan dengan metode spiral, diukur melalui panjang aliran logam cair yang terbentuk dalam cetakan. Uji kekerasan dilakukan menggunakan metode Vickers dengan beban 100 gf dan indentor diamond pyramid, sementara pengamatan struktur mikro dilakukan menggunakan mikroskop metalografi dengan perbesaran hingga 200x. Hasil penelitian menunjukkan bahwa peningkatan suhu penuangan memberikan pengaruh positif terhadap peningkatan fluiditas logam cair. Jenis pasir juga memengaruhi hasil pengecoran, di mana pasir gunung menunjukkan nilai fluiditas dan kekerasan yang lebih tinggi dibandingkan pasir pantai. Struktur mikro hasil pengecoran dengan pasir gunung umumnya memiliki butir yang lebih halus dan seragam, sedangkan pada pasir pantai cenderung terbentuk butiran yang lebih kasar. Temuan ini menunjukkan bahwa jenis pasir dan suhu penuangan berperan penting dalam menentukan kualitas hasil pengecoran aluminium.
STUDI RELEVANSI KURIKULUM KOMPETENSI KEAHLIAN TEKNIK KENDARAAN RINGAN DI SMKN 5 SURAKARTA DENGAN KEBUTUHAN DUNIA INDUSTRI SAAT SISWA MELAKSANAKAN PRAKERIN Akbar, Farhandika; Harjanto, Budi; Rohman, Ngatou
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.v2i2.43243

Abstract

The purpose of this study was to find out: (1) Competency of expertise discussed in Light Vehicle Engineering Expertise Competence of SMKN 5 Surakarta; (2) Competency of expertise obtained by students of Light Vehicle Engineering Skills Competency of SMKN 5 Surakarta prior to the implementation of internship; (3) Competency of expertise needed by the industrial world from students when implementing internship; (4) Relevance of the Curriculum for Light Vehicle Engineering Competence of SMKN 5 Surakarta with the needs of the relevant industrial world from the implementation of internship. This type of research is a qualitative descriptive study. Sources of information in research are productive teachers and workshop or industry heads with information obtained by interviews and analysis of archives. The research process was carried out in two glasses, namely: first, observing the Competency of Light Vehicle Engineering Skills (KKTKR) of SMK 5 Surakarta to study the curriculum needed, comparing the competencies needed before students use apprenticeship. This competency is then recorded and arranged in the form of a simple questionnaire. The second stage is to bring a list of competencies taken before student internship to the industry to see its relevance to the needs of the industrial world. The results of this study indicate that the competencies discussed in the learning skills at KKTKR SMK 5 Surakarta provide the latest 13 revised curriculum in 2017. Competencies obtained from students in apprenticeship are competencies obtained from semester 1 to 3 mathematics lessons. These competencies are provided with competencies from compulsory subjects in class X, namely Image of Automotive Engineering, Basic Automotive Technology, and Automotive Basic Work. Equipped with competencies from the subjects of Light Vehicle Engine Maintenance, Chassis Maintenance and Transfer of Light Vehicle Power, and Light Vehicle Electrical Maintenance approved in semester XI 3. Competencies needed by the industry to be communicated to student apprenticeships related to automotive basics, such as tools -Technical tools such as hand tools and measuring instruments, general vehicle knowledge, security in workshop work. The industry also emphasizes the work relations of students who are good as supporters of implementing internship. The results of the study can be seen from two sides. Formally, the relevance level is more than 90%. While the implementation, there are findings where the level of understanding of students is still lacking including the basic automotive competencies that should have mastered
Studi Penelitian Panjang Kritis Serat Alam Dengan Perlakuan Perendaman Natrium Hidroksida Ramadhan, Rangga Yanuarestu; Estriyanto, Yuyun; Harjanto, Budi
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.v3i4.63009

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. 
ANALISIS KESIAPAN DAN MINAT MAHASISWA DALAM PROGRAM MERDEKA BELAJAR KAMPUS MERDEKA: STUDI KASUS MAHASISWA JPTK FKIP UNS ANGKATAN 2020 Pamungkas, Mukhlis Dwiaji; Harjanto, Budi; Towip, Towip
Nozel : Jurnal Pendididikan Teknik Mesin Vol 4, No 2 (2022)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v4i2.72237

Abstract

It is necessary to increase soft skills and hard skills so that university graduates are ready to work and face challenges in the world of work. Competencies are needed that are integrated with other majors so that university graduates can adapt to the world of work. So that students must be prepared to have readiness and interest in learning in the era of global competition. The Independent Learning Campus Merdeka Program (Program Merdeka Belajar Kampus Merdeka atua MBKM) is expected to be able to answer this challenge. The method used in this research is descriptive statistics. With the aim of testing the hypothesis that there is readiness, interest, and major indicators that affect the readiness and interest of JPTK FKIP UNS students batch 2020 in carrying out the Independent Learning Campus Merdeka program. The conclusion of this study is that there is readiness of JPTK FKIP UNS students batch 2020 in the MBKM program, there is interest from JPTK FKIP UNS students batch 2020 in the MBKM program, there are large indicator values that affect the readiness and interest of JPTK FKIP UNS students batch 2020 in implementing the MBKM program, namely indicators Emotions of Pleasure and Psychic Conditions Affective Attitudes.
PENGEMBANGAN MEDIA PEMBELAJARAN E-PUBLICATION MODUL TEKNIK SEPEDA MOTOR MAHASISWA PENDIDIKAN TEKNIK MESIN FKIP UNIVERSITAS SEBELAS MARET Sasongko, Wisnu Dimas; Widiastuti, Indah; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (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.v1i2.32996

Abstract

Mobile learning has become a great tool for delivering educational resources in which learners can not only access the module anytime and anywhere, but also can actively interact with the learning material. This research aims to design and develop learning material of an automotive engineering course based on mobile device for mechanical engineering education students. The development e-publication module of motorcycle mechanic course employed the ADDIE instructional design model encompassing five steps: analysis, design, development, implementation, and evaluation. The student’s learning style was identified to characterize mobile module target. It was found that majority of the students as user have auditory and kinesthetic, then the module will be designed with the design in accordance with auditory and kinesthetic learning style, therefore the module will be mainly designed on audio-based format. The learning module developed using e-publication software consisting of structured documents combined with audio and video files. Some experts were asked to evaluate the implementation feasibility of the module. The average evaluation score was 85.4%, indicating high acceptance of implementing the learning module. It implies that e-publication module delivery has the potential to gain wider acceptance in engineering education complementing the in-class and practical learning.
Co-Authors Aji, Bayu Handoyo Akbar, Farhandika Alim, Ferindra Alphania Rahniayu Anny Setijo Rahaju, Anny Setijo Ardianto, Renaldo Adhe Aryananta Lufti Bahrudin, Faqih Bantara, Maulana Arbi Cahyanto, Bimo Tri Fanani, Afrizal Rosyid Frangky Silitonga Gondo Mastutik Heri Wijanarko Herman Saputro Hidayat, Faras Nur Indah Widiastuti Irma Cahyaningtyas, Irma Kafi, Ahmad Kholis, Aqis Nur Lufti, Aryananta Lumintang, D.Ricky Ngatou Rohman Nila Kurniasari Nyenyep Sriwardani, Nyenyep Pamungkas, Mukhlis Dwiaji Perdana Sutrisno, Valiant Lukad Pratama, Dadang Ramadhan, Rangga Yanuarestu Ranto Ranto Rusdianto, Ichsan Saputra, Fajar Rizki Sasongko, Wisnu Dimas Setyawan, Apri Ghuntur Siwi, Dewi Rima Ratri Sripratama, Eki Suharno Suharno Sukahar Sukahar, Sukahar Sukirno Sukirno Sulistyo Sulistyo Suparyana Tomo, Tri Tam Towip, Towip Ulinnuha, Dwi Kusuma Ulya, Amin Hakim Nur Utomo, Andhika Budi Wicaksono, Rochim Toat Yuyun Estriyanto