Journal of Applied Mechanics Reviews and Reports
ISSN: 3069-0803 | DOI: 10.64030/3069-0803
Rabiu Ahmad Abubakar
This study evaluates the performance of a hand-powered portable household grinding machine designed for domestic use, particularly in areas where electric appliances are inaccessible or impractical. The experiment aimed to assess the machine’s efficiency, durability, and user-friendliness in processing common household materials, including grains, spices, and seeds. Five representative samples—maize, millet, dried pepper, coffee beans, and rice—were selected for testing. Each sample weighed 500 grams, and the performance metrics included grinding time, particle size uniformity, and user effort, which was measured using a force gauge. The grinding machine demonstrated consistent functionality, achieving satisfactory particle sizes across all samples within a time range of 6 to 15 minutes. Softer and less dense materials, such as dried pepper and millet, required minimal effort and time, while harder grains like maize posed challenges, demanding increased effort and extended grinding durations. User effort averaged 25 Newtons, with peak values recorded for maize at 30 Newtons. The results indicate that the grinding mechanism is optimized for softer materials but struggles with harder substances, underscoring the need for improvements in blade efficiency and ergonomic design.Durability testing revealed the machine’s robust construction, as it completed 10 continuous cycles without mechanical failure or noticeable wear. This durability supports its suitability for regular household use. Additionally, its portability and reliance on manual operation make it a cost-effective and sustainable alternative to electric grinders, especially in off-grid or remote areas. Despite its merits, areas for enhancement remain. Reducing the manual effort required for harder grains and improving grinding efficiency for a wider range of materials could significantly expand the machine’s usability. Nevertheless, this device offers a practical solution for households in low-resource settings, enhancing food processing capabilities while promoting energy independence. Further design refinements could enhance user comfort and broaden its applications.