BEARING DEVICE AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To excellently prevent outward leakage of a lubricating fluid with simple constitution. SOLUTION: A bearing device is constituted so as to return a lubricating fluid trying to leak outside a dynamic pressure bearing part RB in the dynamic pressure bearing part RB by the action of a fluid guide groove 15f by arranging the fluid guide groove 15f for introducing the lubricating fluid toward an inside area from an outside area of the dynamic pressure bearing part RB in at least one side member of a shaft member or a bearing member, and is constituted so as to excellently continue the dynamic pressure generating action over a long period by quantitatively maintaining the lubricating fluid in the dynamic pressure bearing part RB.