The vertical crusher series MC of Franzoi Metalmeccanica srl is a mill with a vertical axis rotor and crusher chains. This type of rotor, combined with a crushing chamber octagonal, generates in the material a motion which facilitates the auto- crushing causing a reduction of the feed size and a breakdown of the different materials connected to each other. The crushing chamber is equipped with a changeable grid which defines the calibration of the output material. The particular geometry of the crusher and its versatility allows the treatment of various materials: WEEE, tyres, cans, stones, ... For this purpose even the speed of rotation of the mill can be varied so as to optimize the crushing of different materials.