Archives

  • March 2025
    Vol. 1 No. 1 (2025)

    The March 2025 edition of KOLECER Scientific Journal of Mechanical Engineering presents a diverse array of innovative research in the fields of engineering and applied technology, encompassing manufacturing optimization, industrial risk analysis, as well as the development of energy and transportation technologies. The first article introduces a novel model for determining end milling parameters based on screening tests conducted on AA6041 aluminum alloy, with the aim of enhancing both efficiency and accuracy in machining processes. Subsequently, a study on subsea pipeline replacement projects utilizing the HIRADC and FTA methods analyzes potential hazards and mitigation strategies to improve occupational safety. The optimization of a coconut husk peeler machine design with a capacity of 260 units per hour is also featured in this edition, with findings indicating increased efficiency within the coconut processing industry. In the transportation sector, research on hybrid electric bicycles equipped with a 60A Speed Control controller explores system performance, energy efficiency, and durability under various operational conditions.

    Another study addresses the optimization of combustion quality in coconut shell briquettes using the gravimetric method, aiming to enhance efficiency and durability as an alternative energy source. Additionally, the development of a control system for a transformer rectifier used in cathodic protection with dynamic loads is proposed as a solution to manage corrosion in industrial systems operating under extreme conditions.

    Lastly, a study on impeller design for a centrifugal pump with five blades driven by a 40 cc four-stroke gasoline engine provides optimal design recommendations to improve system performance and efficiency across a range of engineering applications.

    Through these in-depth investigations, the March 2025 edition is expected to deliver significant scholarly contributions to both academics and practitioners in the field of engineering and related industries.

    Editorial Team
    Kolecer Scientific Journal of Mechanical Engineering

  • September 2025
    Vol. 1 No. 2 (2025)

    KOLECER Journal Vol. 1 No. 2, September 2025, presents six scholarly articles focusing on development and analytical studies in mechanical engineering, manufacturing, energy systems, and instrumentation. This issue has been designed to enrich the body of applied scientific knowledge through analytical, experimental, and engineering-based design approaches.

    The first article discusses the analysis of the strength and Safe Working Load (SWL) of a single crane hook using SolidWorks, with emphasis on stress evaluation and safety factors for lifting components to ensure operational reliability and safety. The second article examines the influence of blade configuration in a simple shredding machine on the quality of shredded PLA and PET, with particular attention to blade design optimisation to enhance plastic material shredding performance. The third article, entitled Development of Rotary Fixture on Laser Engraver Machine, presents the design and development process of a rotary fixture intended to improve flexibility and precision in laser engraving of cylindrical workpieces. Subsequently, the fourth article reviews the analysis of heat transfer and energy conversion in split-type air conditioning systems, evaluating thermal performance and energy efficiency under specific operating conditions. The fifth article addresses the calibration and uncertainty analysis of DHT22 temperature sensor measurements using a calibrated digital thermometer as a reference instrument, aiming to improve measurement accuracy and reliability for experimental and industrial applications. The final article investigates the effect of spindle rotational speed variation on the surface roughness of Aluminium 6061 in milling processes, with emphasis on the relationship between machining parameters and the resulting surface quality.

    KOLECER Journal Vol. 1 No. 2, September 2025, is expected to serve as a valuable scientific reference for students, researchers, and engineering practitioners, and to advance knowledge and technology in applied engineering.

    Editorial Team
    Kolecer Scientific Journal of Mechanical Engineering

  • March 2026
    Vol. 2 No. 1 (2026)

    The Editorial Board is pleased to present KOLECER: Scientific Journal of Mechanical Engineering, Vol. 2, No. 1, March 2026. This issue reflects a continued commitment to providing a scholarly platform for the dissemination of high-quality research and applied studies in mechanical engineering and related disciplines. The journal aims to bridge theoretical advancement and practical implementation in addressing current engineering challenges. This volume comprises five peer-reviewed articles that demonstrate both analytical depth and practical relevance. The published works encompass a range of topics, including structural analysis, welding technology, building utility systems, and the development of appropriate technologies for small- to medium-scale industries. Collectively, these contributions highlight the diverse applications of mechanical engineering in addressing contemporary technological and industrial needs.

    The first article presents an analysis of the effect of cyclic loading on fatigue and deformation of drone propellers using the finite element method, providing insights into structural reliability and performance. The second article examines the effect of variations in TIG welding current on the tensile strength of stainless steel 304 welded joints, offering significant findings for welding process optimization. The third article discusses the design of a clean-water distribution (plumbing) system for a permanent villa in Wayang Windu, addressing practical challenges in building utility systems.

    Further contributions include the development of a gas burner-based rotary drum coffee roasting machine aimed at improving production efficiency and product consistency for small- to medium-scale users. The final article presents the design and fabrication of a cracker dough-cutting machine for household industries, with a capacity of 78 kg/h and driven by a 1/6 HP electric motor, to enhance production efficiency and operational performance.

    The Editorial Board extends its sincere appreciation to the authors for their valuable contributions, as well as to the reviewers for their rigorous and constructive evaluations that ensure the academic quality of this publication. It is hoped that the articles presented in this issue will serve as valuable references for researchers, practitioners, and students, and will encourage further research and innovation in the field of mechanical engineering.