Patent ID: 8020301

Claim:
A method for manufacturing a hydro dynamic bearing device including a housing, an axial member housed in the housing, a radial bearing part for supporting the axial member in a non-contact manner in a radial direction by a hydro dynamic pressure action of a lubricating oil generated in a radial bearing clearance, and a sealing part formed on one end part of the housing, the method comprising the step of wiping off the lubricating oil adhering to an outer end face of the sealing part and an outer end face of the axial member by acting a negative-pressure suction force by suction means at least on the outer end faces after applying the lubricating oil to the housing, wherein the lubricating oil adhering to the outer end surface of the sealing part is wiped off while a tip of a nozzle of the suction means is arranged right above the outer end surface of the sealing part, and the negative-pressure suction force is applied while the hydro dynamic bearing device is rotated about an axial center thereof.