| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing which can hold a rotating body in its rotational state with a high degree of accuracy and can be easily built in the rotating body and besides can be manufactured at a low cost, and provide a spindle motor utilizing the bearing. SOLUTION: A motor hub (a rotating body) 4 is supported in a freely rotatable manner by a bearing 3 comprising one unit of a four contact points type ball bearing 12 with a negative radial clearance. |
