International Journal on Science and Technology

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Call for Paper Volume 16 Issue 4 October-December 2025 Submit your research before last 3 days of December to publish your research paper in the issue of October-December.
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Volume 16 Issue 4
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Design And Development of A Mobile Grain Grinding Machine For Small-Scale Feed Production

Author(s) Mr. Nnam Ikechukwu Onwuka, Mr. Dumpe Koba Barinem, Mr. Sampson Nsimoh Michael
Country Nigeria
Abstract This study focuses on improving a grain grinding machine used for processing maize, millet, sorghum, and wheat to support small-scale livestock feed production. The aim was to overcome common issues such as low efficiency, limited mobility, excessive noise, and reduced throughput found in the existing equipment at the Akanu Ibiam Federal Polytechnic livestock farm. Using locally available engineering materials, several design modifications were made, including lowering the machine’s height for better ergonomics, enlarging and tilting the hopper (40° angle of repose) to enhance feed flow, fitting rubber tires to aid movement and reduce vibration noise, changing the pulley ratio from 3:1 to 2:1 to boost speed, upgrading the engine from 1 hp to 4 hp for greater output, and minimizing the grinding chamber clearance for finer grinding. The redesigned machine was modeled in SolidWorks 2015 and fabricated using arc welding and bolted joints. A 4 hp petrol engine operating at 3000 rpm and delivering 559.48 Nm of torque powered the 38 mm diameter shaft, which rotated the grinding discs. The grinding process operates on a frictional principle, where grains fed through the hopper are crushed between a rotating toothed wheel (driven by the engine) and a fixed toothed plate until the desired fineness is achieved. The discharge is controlled via an adjustable outlet gate. Overall, the modifications significantly improved the grinder’s ergonomics, efficiency, mobility, and usability, offering a reliable and adaptable solution for small-scale grain processing.
Keywords Ergonomics, Mobility, Development, Grinding, Grain
Field Engineering
Published In Volume 16, Issue 4, October-December 2025
Published On 2025-10-15
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