| 摘要 |
In this type of fluid dynamic bearing device, there is formed a resin member capable of suppressing the intrusion of a lubricating oil as much as possible even when carbon fibers are compounded. A housing part 7 as the resin member can be obtained by injection-molding a resin composition in which PPS is a base resin, and carbon fibers are compounded. The housing part 7 is in contact with an ester-based lubricating oil filled in the inside of the bearing. In this case, the plurality of carbon fibers bound with a binder material not containing an urethane resin are cut and the carbon fibers minced by cutting are compounded into PPS to thereby obtain the above-described resin composition.
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