Abstract: An oil mill/crusher includes an external casing having a cylindrical chamber, a rotor positioned in the chamber and eccentric with respect to the latter, a plurality of blades, constrained at one end to a central axial pin of the chamber and extended through the rotor in the chamber in grooves formed in rotating elements provided in the peripheral part of the rotor. The blades rotate around the pin. The eccentricity between the rotor and the chamber causes a continuous variation of a blade projection with respect to the peripheral part of the rotor operating the mill. The width of each of the blades is substantially equal to half the width of the width of the chamber. The blades alternatively rest on the right and left sides of the chamber, in order to avoid their jamming against knurled walls thereof.