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All Journal JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Jurnal Inovasi Teknologi Terapan Trends in Mechanical Engineering Research Jurnal Inkofar
Antonius Adi Soetopo
Politeknik Manufaktur Bandung
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Rancang Bangun Alat Pemeriksa Run Out Roda Gigi menurut Standar ISO 1328 Iwan Gunawan; Antonius Adi Soetopo; Rahmat Romadhona Prayoga
Jurnal Teknologi dan Rekayasa Manufaktur Vol 1 No 2 (2019): Vol 1 No 2 (2019): Volume: 1 | Nomor: 2 | Oktober 2019
Publisher : Pusat Pengembangan, Penelitian dan Pengabdian kepada Masyarat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (981.26 KB) | DOI: 10.48182/jtrm.v1i2.12

Abstract

One of the parameters is the reference to the quality of the gear that is run out. Run out is the change in the location of the current element rotates against a fixed point on the axis of reference. The method used to check for errors swivel gear that is by turning the gears are checked with the master gear. Checker tool run out of gears using stepper motors as gear and readings players run out using LVDT sensors. Mechanical construction specifications that is thedistance between spindle capacity maximum 170 mm. Maximum run out that can be read by the LVDT sensor is 3.50 mm. The operating system uses an interface program that can be adapted to the gear to be checked. Inspection run out gear carried on a pair of straight gears are split into two parts with module 2, number of teeth 34. The examination was conductedat four different gear positions, tolerance RCE (radial composite error) allowed for automotive applications (ISO grade 8) is0.09 mm, where the measurement results obtained from the smallest RCE at position 3 (1A on z-1 and 1B on the z -19) at 0.10 mm so we can say that the measured gear can not be used for automotive applications because the measured RCE exceed permissible limits.
MANUFACTURE OF BODIES, BOOM AND BASE FRAME FOR MINI FLOOR CRANES WITH A LIFTING CAPACITY OF 2 TONS Antonius Adi Soetopo; Rani Nopriyanti; Ahmad Maulana Mustopa; Faiq Surya Ramadhani
Trends in Mechanical Engineering Research Vol 4, No 1 (2026): JUNE
Publisher : Department of Mechanical Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/timer.v4i1.40777

Abstract

Operational efficiency in small and medium scale manufacturing industries and machine maintenance workshop heavily depends on the smooth flow of heavy material handling. The use of precise lifting equipment is crucial olxtogel for ensuring workplace safety and production activities. However, in work areas where speace is limited or movement is restricted, the use of large lifting equipment is impractical and economically unfeasible. This study aims to design and build mini floor crane with a lifting capacity of 2 tons, focushing on the design and fabrication of the body, boom and base frame structures. The research method combines manual mathematical calculation to determine bending stress and deflection in the boom and base, which is then validated using Finite Element Analysis (FEA) to identify critical points in the structure. Productivity analysis demonstrates that the use lifting equipment is significantly more advantageous both technically and economically, with increased operational efficiency compored to methods.
MANUFACTURE OF NATURAL HUMAN-HAIR FIBER-REINFORCED COMPOSITES WITH COMBINED 0°/±45° FIBER ORIENTATION Okta Pianti Rahayu; Antonius Adi Soetopo; Marta Hayu Raras Sita Rukmika Sari
INKOFAR Vol. 10 No. 1 (2026)
Publisher : Politeknik META Industri Cikarang

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Abstract

Background Human hair is an abundant biodegradable waste material generated worldwide; however, its potential as a reinforcement material in polymer composites remains largely underutilized despite its favorable tensile properties compared with many natural fibers. Existing studies have primarily focused on simple fiber orientations, while the mechanical performance and reliability of human-hair composites with combined fiber orientations have received limited attention Purpose This study aims to evaluate the tensile and flexural properties of a human-hair fiber- reinforced epoxy composite with a combined 0°/±45° symmetric and balanced fiber orientation and to assess the reliability of its mechanical performance using Weibull statistical analysis Methodology Human hair fibers were chemically treated with a 5% NaOH solution for 30 minutes and reinforced with an Epoxy Bakelite EPR-174 matrix at a 50:50 fiber-to-matrix weight ratio using the hand lay-up fabrication method. The composite specimens were cured at room temperature for 12 hours and tested according to ASTM D3039 for tensile properties and ASTM D7264 for flexural properties. A Weibull distribution analysis was performed to evaluate the reliability of the measured mechanical properties. Findings The developed composite exhibited an average tensile strength of 32.24 MPa and an average flexural strength of 63.13 MPa. Based on Weibull analysis, the predicted strengths at 90% reliability were 31.05 MPa for tensile loading and 60.00 MPa for flexural loading. The combined 0°/±45° fiber orientation effectively distributed the applied load across multiple fiber directions, resulting in lower tensile strength than a fully unidirectional 0° laminate while providing a more balanced mechanical response and enhanced structural reliability. Implications The findings demonstrate that human-hair fiber composites have significant potential as sustainable and environmentally friendly reinforcement materials for lightweight composite applications. Future studies should investigate additional fiber orientations, optimize fiber volume fractions, and incorporate density characterization following ASTM D792, together with microstructural analyses, to further improve mechanical performance and validate failure mechanisms. Originality This study is the first to provide a reliability-based mechanical characterization of a human-hair fiber-reinforced Epoxy Bakelite EPR-174 composite with a combined 0°/±45° symmetric and balanced fiber orientation. The integration of experimental mechanical testing and Weibull reliability analysis offers new insights into the structural performance of biodegradable hair fiber composites for engineering applications.  
Modifikasi Sistem Buka-Tutup Dan Struktur Tulangan Kap Mesin Purwarupa Kendaraan Listrik Pandoe Pandoe; Antonius Adi Soetopo; Rifki Tri Pangestu
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.v4i2.458

Abstract

The engine hood of the prototype electric vehicle, developed in a previous study, still uses a permanent mounting system, which limits access for inspection and maintenance of the vehicle’s front compartment. This study aims to implement an opening-closing system and a reinforcement structure for the hood using 1 mm-thick Steel Plate Cold Commercial (SPCC). The research was conducted through the following stages: design using SolidWorks 2022; fabrication of the hood panel and reinforcement structure; assembly of the opening-closing mechanism components; and evaluation of the implementation results. The opening-closing mechanism consists of a hood hinge, a hood latch, and a hood support rod, while the reinforcement structure was fabricated using a 25 × 25 × 2 mm hollow square  profile. The results of the study indicate that the opening-closing system and the reinforcement structure were successfully implemented according to the design, forming a single structural unit with the hood panel. The reinforcement structure serves to strengthen the panel while also acting as a mounting bracket for the hood hinge and hood latch, whereas the implementation of the opening-closing system improves ease of access to the vehicle’s front compartment for inspection and maintenance compared to the previous design, which used a permanent mounting system. Furthermore, the development of the hood enhances functionality without altering the primary dimensions or the basic concept of the front body of the prototype car.
Co-Authors Ahmad Maulana Mustopa Faiq Surya Ramadhani Iwan Gunawan Okta Pianti Rahayu Pandoe Pandoe Rahmat Romadhona Prayoga Rani Nopriyanti Rifki Tri Pangestu Sari, Marta Hayu Raras Sita Rukmika