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All Journal Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Polimesin
Eko Wahyu Saputra
Universitas Lampung
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Pemodelan dan simulasi pengeboran pada proses pengeboran tulang dalam pembedahan ortopedi Eko Wahyu Saputra; Yanuar Burhanuddin; Suryadiwansa Harun
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol 4 No 1 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i1.3359

Abstract

Dalam pembedahan ortopedi, mata bor berfungsi sebagai alat bantu membuat lubang untuk sekrup dalam upaya perbaikan fraktur atau pemasangan perangkat prostetik. Selama proses pengeboran berlangsung akan meyebabkan peningkatan suhu pada area pengeboran, kenaikan suhu melampaui batas yang diijinkan akan mengakibatkan matinya sel-sel tulang akibat kehilangan suplai darah yang disebut dengan nekrosis. Untuk mencegah peningkatan suhu berlebihan tersebut, salah satu cara yang dapat dilakukan adalah dengan melakukan pemilihan geometri mata bor menggunakan finite-element analysis model tiga dimensi untuk mendapatkan nilai temperatur pengeboran tulang yang serendah mungkin. Penelitian ini berfokus pada nilai point angle 118°, yang dikombinasikan dengan nilai helix angle 13°, 20°, 28° dan 30°. Dari kombinasi tersebut menghasilkan nilai temperatur optimal pada helix angle 28° dengan suhu maksimum pada 38.814° C.
OPTIMIZING MAINTENANCE FREQUENCY ON INSTRUMENTATION WITH THE RELIABILITY CENTERED MAINTENANCE METHOD AT PT X Mochammad Resha; Eko Wahyu Saputra; Chandra Salim
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 6 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i6.4514

Abstract

In facing maintenance challenges in offshore oil and gas operational platforms, determining instrumentation components based on Safety and Environment Critical Element (SECE) with the Reliability Centered Maintenance (RCM) method requires component repair data in the 2019-2023 time interval. So far, maintenance intervals have been carried out conventionally without considering historical reliability data, which has led to over-maintenance and under-maintenance. This study aims to optimize the maintenance frequency of SECE instrumentation with the RCM approach to improve technical, operational, and economic efficiency, as well as ensure compliance with safety and environmental standards. The methodology used includes data collection, technical document analysis, reliability calculations, and the development and re-implementation of maintenance work in the system. The calculation results show that several instruments have a high level of reliability, such as the pressure transmitter at 99.86%, while the shutdown valve recorded the lowest reliability of 97.86%, which based on a significance test can be extended to a 12-month maintenance interval. Optimizing the maintenance interval resulted in a significant reduction in man-hour requirements, up to 27% on the entire platform while maintaining system reliability. Technical recommendations were also proposed, including the use of statistical approaches such as the Weibull distribution for further analysis. This research shows that a data-driven RCM approach not only improves system reliability but also resource efficiency and overall occupational safety.
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 Chandra Salim Fauzan Azima Jamiatul Akmal Martinus Martinus Mochammad Resha nurcahya nugraha Rizal Nazarrudin Suryadiwansa Harun Wahyu Adani Yanuar Burhanuddin