| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing remarkably excellent in wear resistance in molten metal. <P>SOLUTION: A cage is formed by pyrolytic carbon coated graphite in which high purity isotropic graphite with a total ash content amount of 20 ppm or less is coated with pyrolytic carbon having a coefficient of thermal expansion of 0.5-6.0 x 10<SP>-6</SP>/°C, to a thickness of 5-250 μm. <P>COPYRIGHT: (C)2008,JPO&INPIT |
