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All Journal Jurnal Elementer (Elektro dan Mesin Terapan) ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Polimesin
nurcahya nugraha
universitas lampung
Aerospace Engineering Automotive Engineering Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Rancang Bangun Mesin Pembusa dengan Variasi Bibit Pembusa An-Nisa Magnolia; nurcahya nugraha; rizal nazarudin nazarudin; ferly citra ardiansyah
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.11198

Abstract

This study aims to design and develop a foam generator for the production of lightweight construction materials. The primary focus is to analyze the impact of varying ratios between water and foaming agent on the density of the foam produced. The developed device is expected to produce stable foam with precise control over its density and bubble size. The research involves designing, assembling, and testing different mixtures of foaming agents. The results show that increasing the volume of the foaming agent leads to higher foam density, smaller bubble size, and closer spacing between bubbles. The optimal ratio found in this study is 1000 ml foaming agent to 19000 ml water, which produced the densest and most homogeneous foam. At this ratio, the foam exhibits smaller bubbles and tightly packed distribution, resulting in a material with sufficient structural strength and low density. The findings provide a foundation for further development of more efficient and stable foam generators, offering potential for producing environmentally friendly and cost-effective lightweight construction materials.
Pengaruh Posisi Roda terhadap Laju Keausan Blok Rem Komposit Pada Lokomotif Kereta Api An-Nisa Magnolia; Jamiatul Akmal; Novri Tanti; Nurcahya Nugraha; Syaipudin Anwar
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 12 No 1 (2026): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v12i1.6910

Abstract

Penelitian ini bertujuan untuk menganalisis laju keausan blok rem komposit yang terdapat pada lokomotif CC 205. Material Komposit sudah banyak digunakan sebagai blok rem, hal ini dikarenakan blok rem komposit memiliki ketahanan aus yang baik dibandingkan material besi. Penelitian ini dilakukan dengan metode pengukuran dimensi dan massa pada 12 spesimen kampas rem dibagian kanan 6 set dan dibagian kiri 6 set yang digunakan selama 3 bulan dengan 30 kali perjalanan. Data yang didapat meliputi waktu pengereman rata-rata 5,6 detik dengan 78 kali pengereman per perjalanan. Laju keausan dihitung menggunakan persamaan specific wear rate (kehilangan massa per satuan luas penampang per satuan waktu pengereman) berdasarkan selisih massa awal dan akhir, luas penampang, dan waktu total pengereman. Hasil penelitian menunjukkan variasi laju keausan yang bernilai diantara 1,08 x 10-7 gr/mm2.detik hingga 6,71 10-7 gr/mm2.detik. Laju keausan terbesar berada di spesimen 2B kanan, 2B kiri dan 4D kanan, sedangkan laju keausan terendah pada spesimen 1A kanan dan kiri. Faktor-faktor yang mempengaruhi keausan diantaranya pengereman mendadak, aliran udara yang terhambat, tekanan yang tidak stabil, pemasangan blok rem yang tidak seragam, serta tingkat kekasaran permukaan roda. Ketebalan sisa kampas rem bervariasi antara 18-41 mm dari ketebalan awal 50 mm. Hasil penelitian ini diharapkan menjadi dasar rekomendasi material rem yang optimal serta jadwal pemeliharaan yang lebih efisien dan aman.
Development and validation of a modified TM25 journal bearing test equipment for load-carrying capacity and frictional torque measurement Nurcahya Nugraha; Jamiatul Akmal; Martinus Martinus; Ahmad Su'udi; Rizal Nazarrudin; Eko Wahyu Saputra; Wahyu Adani; Fauzan Azima
Jurnal Polimesin Vol 24, No 3 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i3.8490

Abstract

This study developed and validated a low-cost measurement platform by upgrading an existing TM25 journal bearing demonstration unit. The original apparatus was limited to pressure distribution observation through manometer tubes, whereas the modified system integrated load cells and an Arduino-based data acquisition system to measure load-carrying capacity and frictional torque in real time. Load cell calibration was conducted using an eight-point dead-weight method with three repetitions, resulting in a calibration deviation of less than 2% across the test range. Experimental testing was performed at five rotational speeds (1000–2000 rpm) using three lubricant grades (SAE 10W-30, SAE 10W-40, and SAE 20W-50) to evaluate their influence on bearing performance. The results show that both load-carrying capacity and frictional torque increase with rotational speed and lubricant viscosity, with the highest values obtained using SAE 20W-50. The measured trends agree well with the original TM25 pressure distribution data and are consistent with hydrodynamic lubrication theory. The modified test equipment provides stable and repeatable measurements and extends the functionality of the TM25 unit as an experimental platform for tribology education and journal bearing performance analysis.
Co-Authors Ahmad Su'udi An Nisa Magnolia An-Nisa Magnolia Eko Wahyu Saputra Fauzan Azima ferly citra ardiansyah Jamiatul Akmal Martinus Martinus Nazarrudin, Rizal Novri Tanti Rizal Nazarrudin Syaipudin Anwar Wahyu Adani