Dry stoners are used in the flour milis tor the separation of the materials with specific weight different than wheat such as stone, metal, glass and soil available within the wheat. Especially, it is an indispensable machine in the cleaning units of dry system. Stone and similar materials may easily enter into wheat. lf a process of separation of these materials from the wheat is not done, the values of ash rate in the flour come up high as a result of grinding. This is an undesirable feature.