ROTATING BODY FOR FLUID DYNAMIC BEARING CAPABLE OF BEING THINNED AND BEING IMPROVED IN ROTATIONAL ACCURACY AND METHOD OF PRODUCING THE ROTATING BODY FOR FLUID DYNAMIC BEARING

摘要

A rotating body for a fluid dynamic bearing used for rotating a recording disk that has been mounted therein include: a rotating shaft portion in which a cylindrical portion that serves as a rotating shaft and a protruding portion extended radially outward from one end of the cylindrical portion are formed integrally with each other; and a hub that is to be connected to the end portion near to the outer circumference of the protruding portion and that has a mounting seat portion on which the recording disk is to be mounted.