Patent ID: 8864380

Claim:
A fluid dynamic bearing device comprising: a bearing sleeve; a shaft member which is inserted in an inner periphery of the bearing sleeve; a dynamic pressure generating section which is formed in any one of an outer peripheral surface of the shaft member and an inner peripheral surface of the bearing sleeve and generates fluid dynamic pressure in a radial bearing gap between the outer peripheral surface of the shaft member and the inner peripheral surface of the bearing sleeve; a housing having an engaged section which engages with an end surface of the bearing sleeve and which is located ahead in a direction of press-fitting of the bearing sleeve, the housing comprising a large diameter section, a small diameter section, and a stepped section which connects the large diameter section and the small diameter section; a thrust receiver which is in contact with and supports an end of the shaft member; and a base fixed onto an outer peripheral surface of the small diameter section, wherein a bottom section is integral with or is separated from the housing, the thrust receiver being disposed on the bottom section, wherein the bearing sleeve is press-fitted in an inner periphery of the large-diameter section of the housing, and wherein press-fitted portions between an outer periphery of the bearing sleeve and an inner periphery of the housing are provided at intervals, in the peripheral direction.