Article Per Year (5 Year)
p-Index From 2021 - 2026
0.562
P-Index
This Author published in this journals
All Journal Turbo : Jurnal Program Studi Teknik Mesin International Journal of Engineering, Science and Information Technology
Harjuma, Harjuma
Unknown Affiliation
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Development of Plastic Shredder Technology to Support Plastic Waste Reduction Harjuma, Harjuma; Tahir, Abdul; Sirama, Sirama; Aswar, Aswar
International Journal of Engineering, Science and Information Technology Vol 5, No 1 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i1.643

Abstract

The plastic waste problem in Indonesia has reached a severe level. Data from the National Waste Management Information System shows that Indonesia produces around 17 million tons of plastic waste yearly. However, only approximately 66.47% of this plastic waste undergoes recycling, with the remainder ending up in landfills or polluting the sea. This condition places Indonesia in second place in the world after China in terms of the amount of plastic waste produced, making it a country with a plastic waste emergency. This article discusses the development of plastic recycling machine technology as a solution to overcome the plastic waste problem in Indonesia. With a production of around 17 million tons of plastic waste per year, Indonesia faces significant challenges in plastic waste management. Low efficiency often constrains the effectiveness of plastic recycling as a solution. Therefore, this study aims to design and improve the efficiency of a plastic shredder machine. This machine uses specially designed rotating blade technology to produce high-precision plastic flakes. Additionally, we have updated the transmission system to reduce vibration and implemented other innovations to enhance the machine's capacity to shred various types of plastic. We expect this machine to decrease greenhouse gas emissions from the recycling process and lower operational costs. This study shows that the developed plastic shredder machine can work effectively and efficiently, meeting the research objectives of producing plastic flakes quickly. Thus, we expect this machine to significantly reduce plastic waste in Indonesia and support environmental conservation efforts.
Kajian Optimasi Material Pengganti Berbahan Baja Karbon AISI 1018 Pada Perbaikan Planetary Gear Mesin Mixer UMKM An-Nur Aswar, Aswar; Naim, Muhammad; Harjuma, Harjuma; Parekke, Simon
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.4083

Abstract

Penelitian ini bertujuan untuk mengatasi masalah kerusakan yang terjadi pada komponen roda gigi mesin pengaduk (mixer) milik UMKM An-Nur di Kecamatan Towuti melalui pendekatan teknologi. Hasil investigasi awal menunjukkan bahwa material asli dari besi tuang memiliki keterbatasan kekuatan dan distribusi kekerasan yang tidak merata, menginisiasi kerusakan dini dan retakan pada profil gigi. Untuk mengatasi masalah tersebut, baja karbon rendah (AISI 1018) dipilih sebagai material pengganti karena aspek teknis, ketersediaan, efisiensi biaya, dan kemudahan dalam proses permesinan. Roda gigi berbahan baja karbon dimanufaktur meliputi proses pemotongan, pembubutan, pembentukan profil gigi, dan perlakuan panas, diikuti dengan pemasangan roda gigi ke dalam gearbox. Hasil pengujian kekerasan menujukkan peningkatan kekerasan sebsedar 37,9 HRC pada roda gigi pengganti berbahan baja karbon (AISI 1018) yang dikeraskan diperoleh kekuatan meningkat signifikan dari roda gigi mula dengan kekerasan 19,3 HRC yang berbahan besi tuang. Hasil rakitan diuji fungsi menunjukkan kinerja yang yang baik pada variasi putaran. Penelitian ini memberikan solusi untuk meningkatkan performa mixer dan memperpanjang umur pakai komponen planetary gear pada mesin, menawarkan model perbaikan bagi industri kecil lainnya dengan tantangan yang serupa.
Pengujian Eksperimental Keausan Bahan Alumunium, Tembaga dan Baja Karbon Menggunakan Uji Keausan Skala Laboratorium Type Pin On Disc Aswar, Aswar; Parekke, Simon; Harjuma, Harjuma; Surono, Bambang; Handono, Sulis Dri
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4677

Abstract

Keausan menentukan kinerja dan umur pakai komponen mekanik. Studi ini mengevaluasi ketahanan aus aluminium, tembaga, mild steel, alloy steel, dan stainless steel menggunakan tribometer Pin-on-Disc skala laboratorium pada gesekan kering. Spesimen silinder (Ø10mm×30 mm) diuji pada kecepatan 290 rpm, lintasan 150 m, dengan dua variasi beban yaitu 3,5 N dan 4,0 N. Laju keausan spesifik dihitung dari perubahan massa dan beban, disertai observasi makroskopik pola keausan. Hasil menunjukkan perbedaan nyata antar material: stainless steel terbaik dengan laju keausan terendah 1,1×10⁻5 cm³/N·m dan pola abrasi ringan. Mild steel dan alloy steel menunjukkan stabilitas terhadap peningkatan beban dengan respon keausan rendah, masing-masing 3,9% dan 5,0%. Aluminium memiliki laju keausan tertinggi dan respons hingga 19,9%, dengan indikasi delaminasi serta akumulasi serpih aus. Korelasi antara data kuantitatif dan morfologi permukaan menegaskan bahwa kombinasi kekerasan tinggi, keuletan memadai, dan stabilitas lapisan oksida merupakan penentu utama ketahanan aus.
Co-Authors Aswar Aswar Handono, Sulis Dri Naim, Muhammad Parekke, Simon Sirama, Sirama Surono, Bambang Tahir, Abdul