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All Journal Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Jurnal Kendali Teknik dan Sains
Wildhan Hidayatullah
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Industrial & Manufacturing Engineering Mechanical Engineering

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Perencanaan Perawatan dan Perbaikan Mesin Parut Kelapa Kapasitas 15 kg/Jam dengan Metode IRRO Rismansyah Rismansyah; Syamsul Hadi; Muhammad Fauzan Hidayatu Ar Rijal; Venus Linggar Pribumi; Wildhan Hidayatullah
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 3 No. 4 (2025): November : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v3i4.1217

Abstract

The problem with the coconut grater machine is that the machine has decreased performance after being used for several years, especially in the mechanical components (electric motor, V belt, Pulley, grater knife, hopper) and its electricity. The purpose of maintenance and repair planning is to obtain costs, maintenance and repair schedules for the period 2026, and the ratio of maintenance costs to profit. The maintenance and repair planning method includes collecting previous maintenance data, applying the inspection-replace-repair-overhaul (IRRO) method, evaluating component conditions, predicting component lifespan, predicting labor costs, predicting supporting equipment that will be used in maintenance, predicting the time to replace spare parts or reinstall repaired components, estimating maintenance and repair costs for the 2026 period, and calculating the maintenance cost to profit ratio. The results of maintenance and repair planning obtained maintenance costs for the 2026 period were IDR 957,000 with an estimated coconut grater machine rental rate of IDR 10,000/hour which has the potential to be rented for 900 hours/year, and the maintenance cost to profit ratio was 10.6% which implies that the coconut grater machine with a capacity of 15 kg/hour is still prospective and feasible to use for the next few years.
Karakteristik Hasil Pengecatan pada Benda Kerja Baja SS400 dan Aluminium dengan Variasi Suhu Benda Kerja dan Tekanan Penyemprotan Ach. Muhib Zainuri; Wildhan Hidayatullah
Jurnal Kendali Teknik dan Sains Vol. 4 No. 3 (2026): Juli Jurnal Kendali Teknik dan Sains
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/jkts-widyakarya.v4i3.6677

Abstract

The coating industry is shifting from solvent-based to water-based paints due to lower Volatile Organic Compound (VOC) content, making them more environmentally friendly. However, water-based paint film characteristics are highly sensitive to workpiece temperature and spraying pressure, requiring careful process parameter evaluation to achieve optimal coating quality. This experimental study employed spray coating on SS400 steel and aluminum with varying workpiece temperatures (30°C, 40°C, 50°C) and spraying pressures (2.0, 2.5, 3.0 bar). Coating hardness was measured using a durometer (Shore A, ASTM D2240) and adhesion via cross-cut test (ASTM D3359); data were analyzed using two-way ANOVA (α = 0.05). Hardness on SS400 steel increased from 84.5–86.5 HA at 2.0 bar to 89.5–91.5 HA at 3.0 bar; on aluminum, from 85.5–87.0 HA to 92.0–94.0 HA. Adhesion on SS400 improved from 2B to 4B–5B, and on aluminum from 1B–2B to 4B–5B across the same pressure range. Workpiece temperature was the most dominant factor influencing both hardness and adhesion, while spraying pressure significantly affected hardness but not adhesion. Optimal coating quality was achieved at 50°C and 3.0 bar. Precise control of both parameters is essential for producing high-quality water-based paint coatings on metallic substrates.  
Co-Authors -, Rismansyah Ach. Muhib Zainuri Muhammad Fauzan Hidayatu Ar Rijal Syamsul Ph.D M.A. Hadi Venus Linggar Pribumi