They are suited to any type of material and in particular thanks to their solid construction, to large dimension rocky materials. This solid machine is built up in a way that it is possible to fit up hoppers of any dimension and capacity. The chassis on which the wheels lean is larger than the axis in order to avoid remnants of material during the working cycle. The feeding trolley slides by turns allowing the material to feed. The driving part consists of a rod-reduction gear and of an adjustable speed motor with electric or manual setting.

THE CAPACITY SETTING OCCURS BY MEANS OF A VARIABLE SPEED DRIVE AND THE MOTION IS GIVEN TO THE TROLLEY BY A ROD-CRANK MOVEMENT.