| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid bearing device which secures reliability and improves accuracy during high speed rotation. SOLUTION: The fluid bearing device in which the radial bearing or both of the radial bearing 30 and the thrust bearing 40 works as a dynamic pressure fluid bearing device, is provided with a lubricant supply line 50 opened between the radial bearing 30 and the thrust bearing 40, a lubricant storing section 60 formed as a storing space for a lubricant by being communicated to the lubricant supply line 50 where the width becomes narrower as being closer to the lubricant supply line 50, and a ventilating hole 70 communicating the lubricant storing section 60 to outside air.
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