| 摘要 |
There is provided a spindle motor having a high speed rotation and a low vibration with high rotation accuracy and capable of installing discs at locations which are spaced apart from a stator core in a thrust direction while employing fluid dynamic bearings and a pivot bearing. The spindle motor comprises a shaft, a bearing housing part provided with fluid dynamic bearings for rotatably supporting the shaft, and a pivot bearing, a stator core fitted to the bearing housing part, a motor hub into which the shaft is fitted, wherein the motor hub has disc fixing parts provided thereon at least at two locations for fitting discs thereto, and the fluid dynamic bearings are fitted the bearing housing part at least at two locations.
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