| 摘要 |
PROBLEM TO BE SOLVED: To provide a spindle motor having high seal pressure resistant performance for reliably preventing the outflow of oil or the like from the inside of the motor when the motor rotates speedily. SOLUTION: Magnetic fluid 14 is filled between the other end peripheral surface of a shaft 2 and a magnetic fluid seal ring 8 between the other end peripheral surface of the shaft 2 and the inner-peripheral surface of a rotor 301. |
