cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
jptm@mail.unnes.ac.id
Phone
-
Journal Mail Official
jptm@mail.unnes.ac.id
Editorial Address
Sekaran, Kec. Gn. Pati, Kota Semarang, Jawa Tengah 50229
Location
Kota semarang,
Jawa tengah
INDONESIA
Jurnal Pendidikan Teknik Mesin
Published by Universitas Negeri Semarang
ISSN : -     EISSN : 25031759     DOI : https://doi.org/10.15294/jptm
Core Subject : Engineering,
Mechanical Engineering
First published in June 2001 and since then it is published biannually in June and December. Contains articles lifted from the results of research on field mechanical engineering and the idea of thinking (conceptual) for the development of education and teaching in the field of Mechanical Engineering, in particular at the Institute of Education Personnel (LPTK) and Vocational High School (SMK). The journal is also a means of communication between professors, teachers, instructors, practitioners in business / industry, as well as other related institutions.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 24 Documents
 1   2   3 
Application of MULTIMEDIA Powerpoint Assisted Learning to Improve Learning Outcomes of Knowledge of the function of Fracture Machine Parts pras, Prastiyo; Muhammad Khumaedi; Kriswanto
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 02 (2025): December 2025 (on going)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i02.28845

Abstract

The purpose of the research conducted to determine the effect of using PowerPoint multimedia on improving student learning outcomes in the subject of milling machine parts at SMK IPT Karangpanas. The background of this research is based on poor student learning outcomes, which are below the Graduation Threshold Value (KKM). Before conducting research, the feasibility of media and material was tested by experts with a percentage of 83% so that the material and media were suitable for use. The method used is quantitative experimental research with a two-group pre-test and post-test experimental model. Samples from two XI classes were taken randomly, with one experimental class and the other as a control class. Data were collected through questions in the form of pretest and posttest, and analysed using normality test, paired sample t-test, independent sample t-test, and N-Gain analysis. Results showed a significant improvement in learning outcomes in the experimental class compared to the control class, with a higher mean posttest score. The independent sample t-test showed significance <0.001, and the mean N-Gain of 0.4713 was classified as moderate. Thus, the use of PowerPoint multimedia was proven effective in improving students' learning outcomes.
ANALYSIS OF MECHANICAL CHARACTERISTICS OF TOOTH BUCKET EXCAVATOR BASED ON DIFFERENT GRADE LEVELS nurdin, akhmad; Zulfikar Alief Utama, Iqbal; Angger Prasetiyo, Bagus; Hidayat, Rosyidi; Paundra, Fajar; Kurniawan, Fajri; Yasmin, Dzikrina Salsabila; Muhyi, Abdul
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 02 (2025): December 2025 (on going)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i02.33074

Abstract

The purpose of this study is to comprehend the microstructure and hardness value of three distinct tooth bucket manufacturers. Three manufacturers' excavator tooth buckets—Canada Grade, China Grade A, and China Grade C—are compared for their mechanical characteristics. Among the tests are the Vickers method for measuring hardness, optical microscopy for examining microstructure, and chemical composition analysis. According to the results, the primary elements in all three specimens—carbon, silicon, manganese, and chromium—meet the DIN Grade 25CrMo4 standard. The martensite phase, which gives the Canada product its hardness and resistance to deformation, dominates its microstructure. The China Grade C product, on the other hand, has a more prominent ferrite phase, which raises ductility while decreasing hardness. China Grade C (570.24 HVN) had the highest hardness test value, followed by China Grade A (517.67 HVN) and Canada (468.09 HVN). This demonstrates that while Canada excels at withstanding heavy loads without damage, China Grade C is better suited for applications needing high wear resistance. Users of heavy machinery can use this study as a scientific guide when choosing bucket nails based on operational requirements, including material toughness and wear.
The Effect of Fuel Injection Duration on Exaust Gas Emissions of a 4-Stroke Engine 113.68 CC Using Bioethanol Fuel Zulfikar, Iqbal; Nurdin, Akhmad; Prasetiyo, Angger Bagus; Irawan, Bambang
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 02 (2025): December 2025 (on going)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i02.33503

Abstract

In Indonesia, the number of motor vehicles using fuel as an energy source is rising quickly. The government has developed renewable energy to reduce fuel consumption because, according to the Downstream Oil and Gas Regulatory Agency (BPH Migas), the consumption of gasoline-type fuels in 2017 was 1,858,875 L/Quarter. Determining the impact of using bioethanol with different injection times on exhaust gas emissions was the aim of this study. Bioethanol is an environmentally friendly alternative fuel for cars that uses less fuel. It is a renewable energy source made from vegetable sources. Variations in fuel injection duration and exhaust gas emission are the main subjects of this study. With no modifications to compression, the engine operates under standard conditions. A gas analyzer and engine speeds of 1500, 2000, 3000, 4000, and 5000 Rpm were used in the study. According to the study's findings, the amount of CO exhaust gas dropped. At 5000 RPM for 4 ms, the lowest CO in bioethanol fuel is 1.21%. With bioethanol fuel, the amount of HC exhaust gas emissions has dropped. 710 ppm at 3000 Rpm for 4 ms is the lowest HC level. When using bioethanol as fuel, the amount of CO2 emissions rises. The maximum CO2 concentration is 6.50% at 5000 RPM for 4 ms. The maximum amount of O2 emissions from bioethanol fuel is recorded at 1500 RPM for 4 ms.
A REVIEW ON THE POTENTIAL OF INDONESIAN NATURAL FIBERS AS BALLISTIC COMPOSITE MATERIALS paundra, fajar; Basuki, Puji; Puspitasari, Indah; Diharjo, Kuncoro
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 02 (2025): December 2025 (on going)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i02.35870

Abstract

Ballistic composites are key materials in protective applications designed to absorb and dissipate the impact energy of projectiles. Currently, the reliance on synthetic materials such as aramid fibers (Kevlar) and ultra-high molecular weight polyethylene (UHMWPE) faces challenges including high production costs, environmental impact, and import dependency. Indonesia, with its abundant natural fiber resources such as ramie, abaca, bamboo, and sisal, has great potential to develop sustainable and self-reliant ballistic composite materials. This review aims to systematically examine the potential of Indonesian natural fibers as ballistic composite materials by analyzing their mechanical properties, comparing them with ballistic requirements, and identifying key challenges and development strategies. The study concludes that although natural fibers exhibit promising mechanical properties, they face major limitations such as hydrophilic nature and variability in characteristics. However, chemical treatments and surface engineering (such as reinforcement with SiO₂, CNT, or SiC) have been shown to improve fiber–matrix interfacial performance, thereby opening opportunities for the utilization of Indonesian natural fibers in effective and environmentally friendly ballistic composites.

Page 3 of 3 | Total Record : 24

 1   2   3 

Filter by Year

2024 2025


Reset
Filter By Issues
All Issue Vol. 25 No. 02 (2025): December 2025 (on going) Vol. 25 No. 1 (2025): June 2025 Vol. 24 No. 02 (2024): December 2024 Vol. 24 No. 1 (2024): June 2024