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All Journal Jurnal Inovasi Teknologi Terapan
Harwadi Harwadi
Politeknik Manufaktur Negeri Bangka Belitung
Agriculture, Biological Sciences & Forestry Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Investigasi Kekakuan Pada Pelat Baja Lunak Dengan Pembentukan Metode Dimple Dies Triangle Profile Risky Arisandi; Erwanto Erwanto; Harwadi Harwadi
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 1 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i1.403

Abstract

This study aims to analyze the effect of variations in the number and diameter of dimple holes on the stiffness of mild steel plates using the Dimple Dies Triangle Profile forming method. Plate stiffness is important for reducing vibrations, especially in vehicle components. The material used was a 0.6 mm thick galvanneal plate, with dimple diameters of 25 mm and 30 mm, and hole quantities of 16 and 20. Testing was conducted using a Vibroport 80 device to measure natural frequency as an indicator of stiffness. The experimental design employed the Taguchi method with an L4 orthogonal array to analyze the influence of each parameter. The results showed that the number of dimple holes significantly affected the plate’s natural frequency, while the dimple diameter had no significant effect. The optimal combination producing the highest stiffness was a 25 mm dimple diameter with 16 holes. ANOVA and S/N ratio analysis supported these findings, indicating that the number of holes contributed more than 90% to the variation. This research is expected to serve as a reference for developing stiffer and more vibration-resistant metal plate designs, particularly for automotive and other engineering structure applications.  
Analisis Keandalan Mesin Digester Menggunakan Metode Failure Mode And Effect Analysis Di Pabrik CPO PT Mas Hegel Tottamor; Harwadi Harwadi; Indra Feriadi
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 1 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i1.416

Abstract

The digester machine is a critical unit in the palm oil processing industry, functioning to soften and mash palm fruit to enable optimal oil extraction. The reliability of this machine plays an important role in ensuring the continuity and efficiency of crude palm oil (CPO) production. This study aims to analyze the reliability of the digester machine at the CPO plant of PT MAS using the Failure Mode and Effect Analysis (FMEA) method. Research data were obtained through direct field observation, interviews with operators and maintenance technicians, and analysis of historical machine failure data from January to December 2024. Each failure mode was evaluated based on severity, occurrence, and detection parameters to determine the Risk Priority Number (RPN), which was used to establish maintenance priorities. The results indicate that the Expeller Arm and Short Arm components have the highest RPN values, identifying them as the most critical components with the highest risk of failure. Based on these findings, maintenance recommendations and corrective actions focused on critical components are proposed to improve the reliability of the digester machine, reduce downtime, and support efficient and continuous CPO production at PT MAS
Analisis Jenis Kerusakan Alat Berdasarkan Diagram Pareto Aji Saputra Jefri; Indra Feriadi; Harwadi Harwadi
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.414

Abstract

Offshore tin mining operations rely heavily on the performance of Production Suction Dredgers as the main production units. The reliability of mechanical production equipment plays a crucial role in maintaining operational continuity and achieving production targets. Recurrent equipment failures can lead to increased downtime, reduced operating hours, and decreased vessel productivity. This study aims to analyze the most dominant types of mechanical equipment failures on KIP Timah 07 using the Pareto Diagram as a basis for determining maintenance priorities. The research method employed is descriptive quantitative with a case study approach. The analyzed data consist of secondary data obtained from daily logsheets, technician work reports, machine operating hour records, and downtime reports during the observation period. Failure data were classified based on failure types, and their frequency, percentage, and cumulative percentage were calculated and presented using a Pareto Diagram. The results indicate that gearbox failure is the most dominant type of failure, contributing 58.88% of the total failure occurrences. In addition, failures in the soil pump bearing block and cutter hydraulic pump also contribute significantly, resulting in a cumulative contribution of 79.44%. Based on these findings, maintenance activities should be prioritized on the dominant components to reduce downtime and improve the reliability and operational productivity of KIP Timah 07.
Analisis Risiko Kegagalan Mesin Thresher Menggunakan Metode Failure Mode and Effect Analysis (FMEA) dan Risk Priority Number (RPN) di Pabrik Kelapa Sawit PT. MAS Ahmad Khoirul Humam Nazhif; Harwadi Harwadi; Indra Feriadi
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.435

Abstract

The thresher machine plays a critical role in separating palm fruits from bunches in palm oil mills. Failures in the thresher machine can lead to increased downtime, production losses, and reduced Crude Palm Oil (CPO) output. This study aims to identify potential failure modes of the thresher machine and determine the most critical components using Failure Mode and Effect Analysis (FMEA) and Risk Priority Number (RPN). This research employs a quantitative descriptive approach with a case study conducted at PT. MAS Palm Oil Mill from January to December 2024. Data were collected through field observations, structured interviews, and operational record analysis. The results show that the thresher machine operated for 5,384 hours with a total downtime of 37 hours due to 11 failure events. Based on the RPN calculation, the V-belt has the highest risk level with an RPN value of 128, followed by the spider component with an RPN value of 126. These components are identified as critical and should be prioritized in maintenance planning. The implementation of FMEA and RPN can support effective maintenance decision-making, reduce downtime, and improve the reliability of the thresher machine.
Co-Authors Ahmad Khoirul Humam Nazhif Aji Saputra Jefri Erwanto Erwanto Feriadi, Indra Hegel Tottamor Risky Arisandi