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All Journal LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Manutech : Jurnal Teknologi Manufaktur
Johanis, Alexius L.
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Optimisasi Desain dan Kinerja Alat Kupas Kulit Polong Kacang Tanah yang Portable Yokasing, Yohanes Benediktus; Abdullah, Amiruddin; Johanis, Alexius L.; Putra Mandala, Aditya Christian
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.466

Abstract

The peeling machine for peanut shells, which has limitations and achieves a peeling capacity of only 85%, requires optimization. To this end, the friction, pressure, and gravity involved are analyzed. The design concept of the peeling machine considers the topographic conditions, particularly in the East Nusa Tenggara (NTT) region. The result of this optimization produces the 'Peeling Machine for Peanut Shells.' The resulting peeling machine has the following specifications: height of 700 mm, length of 50 mm, width of 37 mm, operated manually, with a production capacity of approximately 0.86 ounces per second. The performance, in terms of rotation speed and the number of peeled peanuts, shows a significant correlation with increased capacity. Increasing the diameter of the blades also contributes to higher output. At a speed of 60 rpm, a closer blade distance (11 mm) yields the best results, indicating that the optimization of machine design needs to consider the blade distance in relation to the rotation speed to enhance efficiency.
Evaluasi Penerapan Kesehatan Dan Keselamatan Kerja Di Bengkel Teknologi Mekanik Jurusan Teknik Mesin Politeknik Negeri Kupang Dengan Metode HIRADC Ratu, Desi Natalia; Tuati, Amros A.; Rerung, Oktavianus D.; Lomi Ga, Jonri; johanis, Alexius L.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.24262

Abstract

HIRADC (identification, hazard analysis, and risk control) is the application of controls used to systematically review processes or operations in a system. This research using HIRADC method, summarized in the form of transcripts, analyzed using research forms and risk assessment matrices to identify the hazards levels present in the mechanical technology workshop/laboratory, measurements taken to prevent accidents. Based on the interview results, it was found one accident. The questionnaire results showed the majority of respondents had a positive perception of safety and service quality, Over 70% stating that it was safe and of good quality. However, the frequency of service use was relatively low, with over 50% of respondents stating they had never used the service. Identification and evaluation revealed 1 High Risk, 6 Moderate Risks, and 1 Low Risk. Based on these results, they were categorized as 75% physical and 25% chemical. In addition to the results of technical, administrative, and PPE controls, the steps presented in this study include control measures and preventive actions that can be implemented to improve OSH aspects in the laboratory. Thus, workshop/laboratory managers can develop strategies to reduce risks and enhance user safety.
Co-Authors Abdullah, Amiruddin Lomi Ga, Jonri Putra Mandala, Aditya Christian Ratu, Desi Natalia Rerung, Oktavianus D. Tuati, Amros A. Yokasing, Yohanes Benediktus