Yassa, NerveinKaddour, OsamaDerbala, AsaadHelmy, MamdouhFouda, Tarek2019-12-152019-12-1520112284-7995https://t.ly/L93BnAccession Number: WOS:000422170400017In small-scale industries for dyeing and in medicines as anti-inflammatory substance. Seeds have been used as insecticide and oil extraction for fuel, soap and varnish production. Seed cake has been used as fertilizer, as solid fuel, or in biogas production. Non toxic varieties detoxified seed cake has been used as feed for animal. An local oil extraction machine used to extract different varieties of oil seeds developed and evaluated to increase the extraction efficiency and find the solution for the most problem of all oil press extraction machines that the high percentage of oil in cotton seed cake by use the press screw pitch of double flight, number of blades of 18 blades, development the machine head to control the clearance between machine head and press screw of 1, 1.5, 2 and 2.5mm, and studying the effect of press screw speed of 30, 60, 90 and 120 rpm on machine efficiency and final product quality. The optimum parameters and condition of machine were 32.43kg/h machine productivity, 88.10 kW h/ton energy requirement, 63.905 extraction efficiency, 11.08% oil extracted percentage, 6.51% oil percentage in cake, by using double flight press screw, clearance of 1.5mm, screw speed of 90 rpm and 18blades number. the obtained results were very important for oil extraction industries that use the oil press method for oil extraction.en-USUniversity for energy efficiencymachineextractionoilArticle