| 摘要 |
PROBLEM TO BE SOLVED: To prevent gallium and/or gallium alloy from leaking to the outside without bringing about cost-up to a great extent. SOLUTION: A bearing device includes an inner ring 1 and an outer ring 2 between which open spaces 7 and 8 are formed, and aluminum coating layers 12 and 13 are formed on the ends 10 and 11 of the peripheral surface of the inner ring 1 in the neighborhood of the open spaces 7 and 8. Also aluminum coating layers 17 and 18 are formed on the ends 15 and 16 of the inner peripheral surface of the outer ring 2 in the neighborhood of the open spaces 7 and 8. The aluminum layers 12 and 13 and the ones 17 and 18 have good wettability to gallium lubricant and react with and adsorb the gallium lubricant willing to leak out from the open spaces 7 and 8.
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