| 摘要 |
PROBLEM TO BE SOLVED: To provide a special bearing device being not damaged easily, light in weight, having a long service life and excellent resistance against wear and receiving no influence due to a temperature change, and capable of being manufactured easily, reducing an attack property to a mating member, containing lubricant such as oil and grease sufficiently, holding the lubricant for a long period of time, and achieving a maintenance-free condition without requiring an oil supply during an operation. SOLUTION: In this special bearing device composed of a shaft, a pair of rotating bodies fixed to the shaft, and a support body with which the rotating bodies come into contact, at least one of the shaft, rotary bodies and support body is made of RB ceramic or CRB ceramic.
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