This paper presents the result of work carried out in improving the design , construction and testing of hammer mill by addressing some lapses associated with the design and construction of the existing ones. These improvement involves redesigning and construction of the hammer mill beater, hammer mill chamber, redesigning and construction of the hammer mill shaft, incorporating a gasoline engine directly to the hammer mill beater thereby providing the means of varying the speed of the hammer mill, replacement of the electric motor with a gasoline engine and (multi-functionality of the improved machine in processing many grains such as maize, millet, guinea corn and even dried cassava.
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