| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing indicating superior conductivity, and hardly causing leakage of a grease composition. SOLUTION: The conductive grease composition 6 containing fluorine oil and three types of carbon black is sealed in a cavity part of a deep groove ball bearing. The first carbon black has an average primary particle size of 55nm, a specific surface area of 29m<SP>2</SP>/g, and a DBP absorption amount of 130ml/100g. The second carbon black has an average primary particle size of 30nm, a specific surface area of 800m<SP>2</SP>/g, and a DBP absorption amount of 360ml/100g. The third carbon black has an average primary particle size of 24nm, a specific surface area of 125m<SP>2</SP>/g, and a DBP absorption amount of 165ml/100g. COPYRIGHT: (C)2007,JPO&INPIT |
