Suited for fine or coarse classification of any type of material and for a wide range of productions. The vibrating screens consist of a screen deck casing supported by springs, equipped with a shaft rotating on main bearing supports whose axis passes through the barycentre of the casing. V-VV screens are also defined “free vibrating screens”, as the shaft is driven by a patented system, consisting of “vibration generators” fitted at the top of the shaft itself. If necessary, a washing system with spray sprinklers may be installed.