| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device immersed in molten metal plating bath comprising a cylindrical ceramics bearing and a metallic arm for holding the ceramics bearing so as to restrict cracks of the ceramics bearing and showing a superior durability.SOLUTION: This invention relates to a bearing device immersed in molten metal plating bath comprising a cylindrical ceramics bearing and a metallic arm having holding holes for holding the ceramics bearing, a cylindrical metallic middle member is present between the ceramics bearing and the metallic arm, the middle member has a wall thickness of 5 to 30 mm, an average heat expansion coefficient from 20°C to 500°C of the middle member is lower than the average heat expansion coefficient from 20°C to 500°C of the metallic arm and larger than an average heat expansion coefficient from 20°C to 500°C of the ceramics bearing.SELECTED DRAWING: Figure 1 |
