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All Journal Majalah Ilmiah MOMENTUM Jurnal Sosial dan Teknologi
Desi Natalia Ratu
Politeknik Negeri Kupang
Humanities Civil Engineering, Building, Construction & Architecture Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice

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Analisis Reliabilitas dan Usulan Strategi Pemeliharaan pada Mesin Bor Duduk dengan Metode Reliability Centered Maintenance (RCM) di Workshop Teknik Mesin Politeknik Negeri Kupang Desi Natalia Ratu; Dedy Nataniel Ully; Jonri Lomi Ga
Jurnal Sosial Teknologi Vol. 6 No. 8 (2026): Jurnal Sosial dan Teknologi
Publisher : CV. Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsostech.v6i8.32970

Abstract

Mesin bor duduk merupakan salah satu peralatan utama dalam kegiatan praktikum di Workshop Teknik Mesin Politeknik Negeri Kupang, sehingga keandalan dan ketersediaannya sangat menentukan kelancaran proses pembelajaran. Kerusakan berulang pada komponen mesin dapat menyebabkan downtime, mengganggu jadwal praktikum, serta meningkatkan risiko keselamatan pengguna. Penelitian ini bertujuan menganalisis reliabilitas mesin bor duduk, mengidentifikasi komponen kritis dan mode kegagalan, serta merumuskan strategi pemeliharaan yang sesuai menggunakan metode Reliability Centered Maintenance (RCM). Penelitian menggunakan pendekatan deskriptif kualitatif dengan data historis kerusakan periode 2022–2024 yang diperoleh melalui observasi, wawancara terstruktur, dan analisis dokumen. Analisis dilakukan menggunakan RCM System Breakdown, diagram Pareto, Failure Mode and Effect Analysis (FMEA), perhitungan Mean Time Between Failure (MTBF) dan Mean Time To Repair (MTTR), serta RCM Decision Worksheet. Hasil penelitian menunjukkan MTBF sebesar 166,7 jam, MTTR sebesar 2,9 jam, dan availability sebesar 98,3%. Motor dan V-belt dikategorikan kritis secara operasional, sedangkan saklar merupakan komponen kritis terhadap keselamatan. Strategi yang direkomendasikan mencakup preventive maintenance, condition-based maintenance, inspeksi, dan pemeriksaan fungsi secara berkala. Disimpulkan bahwa penerapan RCM dapat menjadi dasar penyusunan sistem pemeliharaan yang lebih terstruktur untuk meningkatkan reliabilitas, keselamatan, dan kontinuitas operasional mesin.
TENSILE STRENGTH OF DISSIMILAR MATERIAL FRICTION STIR WELDING EFFECTS OF PIN DEPTH VARIATION Viktor Naubnome; Firman Baktiar; Iwan Nugraha Gusniar Nugraha Gusniar; Desi Natalia Ratu; Stefanus Neno; Jemssy Ronald Rohi
JURNAL ILMIAH MOMENTUM Vol 22 No 2 (2026): Oktober
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i2.15674

Abstract

Friction Stir Welding (FSW) is a solid-state welding method that utilizes the heat generated from the friction between the rotating pin and the parent material, so that it is able to produce a good connection without involving the metal melting process. This method is considered very suitable to be applied to aluminum material welding, including dissimilar welding between two different types of alloys. This research aims to analyze the effect of pin depth variation on the mechanical properties of FSW dissimilar material AA7075-T6 and AA6061-T6 using a threaded tapered pin with a shoulder angle of 0°. The pin depth variation used is 3.5 mm, 4.5 mm, and 5.5 mm, with the implementation of tensile testing referring to the ASTM E8 standard. The test results showed that the pin depth of 4.5 mm produced the highest tensile strength of 156,197 N/mm² and yield strength of 152,010 N/mm², while the depth of the pin of 5.5 mm produced the highest strain value of 3,927%, which indicates the best level of ductility among the three variations tested.
Co-Authors Dedy Nataniel Ully Firman Baktiar Iwan Nugraha Gusniar Nugraha Gusniar Jemssy Ronald Rohi Jonri Lomi Ga Naubnome, Viktor Stefanus Neno