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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.
EVALUASI KINERJA SPINDLE MESIN GERINDA DATAR TIPE REFORM PSGS-4070 AH MELALUI ANALISIS GETARAN DI BENGKEL POLMAN BABEL Syahid Al Akhras; Indra Feriadi; Angga Sateria
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Surface grinding constitutes a vital machining process for producing components with high geometric surface quality, with spindle condition serving as the principal factor governing the final machining outcome. This study sets out to evaluate the performance of the spindle on a Reform PSGS-4070 AH surface grinding machine through vibration analysis, while also examining its relationship with surface roughness. An experimental approach was adopted by varying the depth of cut across five levels, with vibration recorded in the horizontal and vertical directions using a Vibroport 80, and surface roughness assessed using a Mitutoyo SJ-210 Surface Roughness Tester. The findings reveal that horizontal vibration rose sharply as the depth of cut increased, moving from Zone A (good) to Zone B (requiring attention) under ISO 10816-3, whereas vertical vibration stayed comparatively steady within Zone A throughout the trials. The resulting spectral pattern points to unbalance in the rotating element along with an early sign of disturbance in the bearing. Horizontal vibration showed a closer relationship with surface roughness than vertical vibration, whose relationship was weaker and less consistent. The safest machining condition was attained at a low depth of cut (≤0.050 mm), yielding the lowest vibration level together with consistently good surface quality.
ANALISIS AKAR PENYEBAB GETARAN BERLEBIH PADA MOTOR LISTRIK MESIN BUBUT GEMINIS GE5-650S DENGAN METODE FIVE WHYS M Nopal Alhafiz; Faiz Alamsyah; Indra Feriadi; Ariyanto Ariyanto
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

The electric motor of the Geminis-GE 5-650 S lathe machine experienced excessive vibration that persisted despite two bearing replacement attempts. This study aimed to identify the root cause of the excessive vibration using the 5 Whys method. Data were collected through visual inspection, vibration measurement, technician interviews, and a review of the equipment manual. The collected data were then systematically analyzed using the 5 Whys method to trace the cause-and-effect relationship until the root cause was identified. The analysis revealed that the excessive vibration was not caused by bearing failure but by wear on the shaft bearing seat resulting from a previous repair. The wear reduced the shaft dimensions, increased the radial clearance, disrupted rotor rotational stability, and ultimately generated excessive vibration. These findings explain why previous bearing replacements failed to eliminate the vibration, as they did not address the actual root cause of the problem. Based on these findings, shaft restoration or replacement is recommended, together with the implementation of standardized repair procedures, post-repair inspections, and also strengthening preventive maintenance program to minimize the risk of similar failures in the future.
PENGEMBANGAN STANDAR INSPEKSI MESIN BUBUT BERDASARKAN ANALISIS KOMPONEN KRITIS DAN MEAN TIME BETWEEN FAILURE (MTBF) Ansyarullah Ansyarullah; Indra Feriadi; Rodika Rodika
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

This study develops a lathe machine inspection standard based on critical component analysis and Mean Time Between Failure (MTBF) to support preventive maintenance. A mixed-method approach was applied through observations, interviews, and historical failure data analysis of the CW 62110B lathe at PT Bahari Makmur Sejahtera from March 2025 to April 2026. Critical components were identified based on failure frequency, downtime, production impact, and maintenance complexity. The results identified six critical components with an MTBF of 220.8 operating hours. The proposed inspection standard defines inspection parameters, methods, inspection frequency, and maintenance actions, and was validated using historical failure data and the principles of ISO 17359:2018.
EVALUASI PEMELIHARAAN MESIN BUBUT DI WORKSHOP PT BAHARI MAKMUR SEJAHTERA UNTUK STANDARDISASI AUTONOMOUS MAINTENANCE Dini Marlika Aprilia; Indra Feriadi; Rodika Rodika
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Consistent basic maintenance is required to maintain lathe condition. This study evaluates the actual routine maintenance condition of a lathe at the Workshop of PT Bahari Makmur Sejahtera based on Autonomous Maintenance standards. A descriptive approach was used through observation, interviews, documentation, initial cleaning, identification of abnormalities and contamination sources, and analysis of standardization needs. Observations revealed accumulated chips, dust, and lubricant residue, the absence of maintenance standards, a non-functioning automatic feed handle, and an improperly aligned machine table. These findings formed the basis for recommendations covering maintenance areas, methods, frequencies, criteria, corrective actions, and responsibilities. The evaluation identified a gap between the actual condition and the characteristics of structured Autonomous Maintenance. Follow-up recommendations include standardization of cleaning, lubrication, inspection, checklists, and abnormality identification as a basis for autonomous lathe maintenance.
ANALISIS AKAR PENYEBAB KEMACETAN ERETAN MEJA PADA MESIN GERINDA DATAR HR PSGS–4070AH MENGGUNAKAN METODE ROOT CAUSE FAILURE ANALYSIS (RCFA) Sapto Anugrah; Hapiz Firdaus; Indra Feriadi; Tuparjono Tuparjono
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Table slide jamming on the Reform HR PSGS-4070AH surface grinding machine can reduce machining quality, disrupt laboratory activities, and increase the risk of component failure. This study aimed to identify the root cause of table slide jamming using the Root Cause Failure Analysis (RCFA) method. Data were collected through observation, interviews, component inspection, and documentation, and subsequently analyzed using the Fishbone Diagram and 5 Why Analysis. The results revealed that the root cause was not the failure of the ball screw, but the absence of a consistent preventive maintenance program, resulting in an ineffective central lubrication system. The proposed corrective actions include restoring the lubrication system, replacing damaged components, and implementing a preventive maintenance program to improve machine reliability.