| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing having an excellent lubricity enabling its operation over a long period even under no-lubrication condition in which a lubricant such as a lubricating oil and a grease is not used and under such an environment in which the rolling element is brought into contact with a corrosive liquid such as a water, an acid, and an alkali and less producing contamination of an external environment due to the leakage of the lubricant. SOLUTION: In this rolling element 1, rolling elements 13 and second rolling elements 14 formed of a resin structure are installed between the raceway surface 11a of an inner ring 11 and the raceway surface 12a of an outer ring 12. The resin component of the resin structure as the material of the second rolling elements 14 is formed mainly of at least one of a resin formable by melting and having corrosive resistance and a fluororesin. Also, the ratio D<SB>P</SB>/D<SB>N</SB>of the diameter D<SB>P</SB>of the second rolling elements 14 to the diameter D<SB>N</SB>of the rolling elements 13 is 0.987 to 1.013, and the ratio N<SB>P</SB>/N<SB>N</SB>of the quantity N<SB>P</SB>of the second rolling elements 14 to the quantity N<SB>N</SB>of the rolling elements 13 is 0.375 or below. COPYRIGHT: (C)2006,JPO&NCIPI
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