Patent ID: 7582996

Claim:
A hydrodynamic bearing motor, comprising: a base; a hollow shaft connected to the base; a pin located inside said shaft, rotatably supported by the shaft, the pin and shaft comprising a hydrodynamic thrust bearing for supporting said pin, a sleeve connected to the pin, the sleeve and shaft comprising a hydrodynamic radial bearing for rotatably supporting the pin via air, and a driving motor connected to said pin and said shaft, wherein said shaft and said sleeve have a gap therebetween comprising a first passage, said sleeve and said base have a gap therebetween comprising a second passage, the second passage comprises a magnet for trapping abraded powder, components forming the hydrodynamic radial bearing and the hydrodynamic thrust bearing are made of an austenitic stainless, and a stress between said components of at least one of the hydrodynamic thrust bearing and the hydrodynamic radial bearing is at least 300 Pa when the hydrodynamic bearing motor is in a stationary state.