The Micron Separator classifies particles by balancing the centrifugal force of the rotor and the centripetal force of the air. Material to be separated is pulled in by the fan through the inlet duct and up to the rotor, where the opposing two forces classify it. Fine particles, more susceptible to centripetal force, are carried on the air current through the rotor and then discharged through the upper outlet duct. Coarse particles, more susceptible to centrifugal force, flow down the inside wall of the machine and go out the coarse particle discharge. Since the rotor speed determines the centrifugal force, particle size can be easily adjusted by changing the rotor speed.