Patent ID: 7871200

Claim:
An aerostatic bearing spindle system using a unidirectional porous metal, comprising: a motor housing; a bearing housing disposed in contact with the motor housing and formed integrally in the motor housing; a main axis installed through inner central regions of the motor housing and the bearing housing; a motor installed to surround the main axis disposed inside the motor housing; and a plurality of unidirectional porous metal bearings installed to coaxially surround a circumferential surface of the main axis disposed inside the bearing housing and having a plurality of pores formed therein, the pores having a predetermined directionality with respect to the circumferential surface, wherein an air inlet is formed integrally in predetermined space between the motor housing and the bearing housing and arranged in parallel to the main axis, and an air outlet is formed integrally in the other space of the motor housing and the bearing housing and arranged in parallel to the main axis, wherein a plurality of air supply channels are formed integrally between the air inlet and each of the unidirectional porous metal bearings, and air supply grooves are formed integrally between the air supply channels and each of the porous metal bearings, wherein a plurality of the porous metal bearings are installed spaced apart from each other, and metal rings having an exhaust groove formed thereon are each installed between the porous metal bearings, and wherein an exhaust channel communicating with the exhaust groove is formed integrally between the metal ring and the air outlet.