Patent ID: 8773815

Claim:
A component for a fluid bearing, the component comprising: a cylindrical member comprising a thrust dynamic pressure generating groove which is provided in one end face of the cylindrical member and which generates thrust dynamic pressure; wherein: the thrust dynamic pressure generating groove comprises a plurality of recesses; the plurality of recesses are formed individually by cutting and machining the one end face of the cylindrical member by a machining tool; the plurality of individual recesses are disposed on, within a region where the thrust dynamic pressure generating groove is provided, a spiral basal line which turns multiple times in the region where the thrust dynamic pressure generating groove is provided and which has a distance from a center of the cylindrical member gradually increasing for each turn on the one end face of the cylindrical member, the plurality of individual recesses each being disposed on the spiral basal line turn by turn; and each of the plurality of individual recesses partially overlaps an adjoining recess from an inner circumference of the region where the thrust dynamic pressure generating groove is provided to an outer circumference thereof.