MG produces a complete range of flattening and straightening machines: SP line. It is the ideal solution to avoid problems during the manufacturing process of coils: cutting, profiling, pressing and shearing. Our multi-cylindrical straightening equipment work subjecting the material to "alternating deformations”. Diameter and spacing of the rollers are essential to achieve a perfect result, according to the thickness and type of material processed. The lower rolls are driven by transmission systems studied by MG for this type of metal fabrication. MG straightening machines are able to eliminate all forms of curvature and undulation of the metal sheet plate. With a performing process of plastic deformation alternated through motorized rollers: a greater number of rollers for thin materials and minor for thicker metal sheets. Designed and built with a configuration of 5, 7, 9 rollers (the lower ones are hydraulically controlled), for working metal sheet plates of widths and thickness requested.