Abstract: A characteristic feature of the present invention is that in an axial means having a housing internally rotatably mounting a rotor on the surface of which threshing and separating elements are arranged in steps. Each step comprises conjugated helical and straight portions. Between the threshing and separating elements conveying elements are disposed so that each of them is connnected by its forward (with respect to the direction of rotation of the rotor) end to the preceding straight portion, its rearward end being positioned with a gap relative to the following straight portion.