Patent ID: 8407899

Claim:
A method of manufacturing a fluid dynamic bearing comprising: a shaft; a flange fixed to one end of the shaft; a shaft housing member configured to rotatably house at least part of the shaft; a flange housing space provided at one end of the shaft housing member and configured to rotatably house the flange; a counter plate configured to face the end surface of the flange in the axial direction and to seal the flange housing space; a radial dynamic pressure groove formed on at least either the shaft or the surface of the shaft housing member, facing the shaft in the radial direction; thrust dynamic pressure grooves provided on at least either the flange or the surface of the flange housing space, facing the flange in the thrust direction, and provided on at least either the flange or the surface of the counter plate, facing the flange in the thrust direction; and a lubricant filled in the radial dynamic pressure groove and the thrust dynamic pressure grooves, the method of manufacturing a fluid dynamic bearing comprising: forming the flange by fixing a resin to the shaft by insert molding while at least part of the shaft is being cooled.