Structure is sheet metal and steel section with reinforcing where necessary,designed to withstand 80,200,300 Kg, of material to be treated in the rotobarrels.Extra large glide pins,hoisting by means of self-braking gearmotor.Possibility of applying a weightng system with loading cells in order to obtain exactly the right amount of material for introduction into the drums.Avaible in two version,with underground or flush loading bucket..