Nano Pulverizer NP-100 was designed with an optimized planetary centrifugal ratio to maximize the collision energy. NP-100 has strong centrifugal forces caused by rotation and revolution motion. The centrifugal forces add acceleration to the pulverizing media (zirconia balls) and strongly　pulverize materials. Although dry-milling less than 3 micron pulverization is principally difficult, wet-milling enables nano pulverizing.