The importance of maize for human, livestock and poultry regarding to use as feed or as dry feed industry. Physical and mechanical properties of maize grains are important to design the planter/seeder (hopper, metric device, tube), grading machines and to select members and storage equipment. So, this study aimed to determine the maize grain physical and mechanical properties for new varieties, namely hybrid single cross Hi-Tech white and hybrid single cross 168 yellow which use as relative parameters for designing machines . One hundred of maize grains were chosen at random from two maize varieties hybrid single cross Hi-Tech white and hybrid single cross 168 yellow. The results found for maize grains of the Hi--Tech and hybrid 168 maize varieties, the mean length, width, thickness, surface area, projected area, kernel volumes, arithmetic diameter, geometric mean diameter, sphericity, and aspect ratio were