The main body is made of steel construction. Oscilliation is performed from center of gravity by weight assembly attached from top and bottom parts. It enables to classify milled product cleanly and routinely owing to cycloid swinging body by centrifugal force and frames with various dimensions in each passenge way within the body. It affects quality and efficiency of milling in flour mills. In order to have this effectiveness, there must be no crop leakage between the cases and screening efficiency must be preeminently. All surfaces of frames are coated with formica. Passageway covers are isolated excellently.Disassembly or assembling is easy.