The title of the project is the design and improvement of a grain cleaning machine system that is efficient, reliable and affordable for industry or small scale industries. The design part of the project will be the most critical as having the correct design will ensure that the machine will be effective in elimination of threads. Threads and dirt in raw materials will be the main focus as it the most nuisance that is faced by the Kenyan industries. The subject industries of our report will be Unga Farm Care EA LTD and Pembe Feed mills two of the biggest grain millers in Kenya. A success for this project will be a solution to these industries, as the grain raw materials passing down the production line will be clean and dirt free, there will be less machine breakdowns, which will result in increased production time.