| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling device having excellent conductivity and keeping a long life under high temperatures. SOLUTION: Grease composition 27 containing synthetic fluid and perfuluoropolyether oil as a base oil, and containing carbon black and a fluorine resin as thickener is filled in a clearance of a ball bearing 21. COPYRIGHT: (C)2003,JPO |
