| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spindle motor. <P>SOLUTION: A spindle motor comprises: a shaft fixed to a base; a rotor hub rotatably disposed via oil while maintaining a bearing gap from the shaft and including a communicating part in communication with the outside so that a shaft-side oil interface is formed between the rotor hub and the shaft; and a compensating part formed by allowing a predetermined area of the rotor hub to be depressed so as to compensate for mass imbalance of the rotor hub due to the communicating part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
