| abstract |
Provided is a rolling bearing that has excellent electrical conductivity and is less likely to be charged and galvanized and to prevent leakage of a grease composition. A conductive grease composition 6 containing polyglycol oil and three types of carbon black is sealed in a gap of a deep groove ball bearing. The first carbon black has an average primary particle size of 55 nm, a specific surface area of 29 m 2 / g, and a DBP absorption of 130 ml / 100 g. The second carbon black has an average primary particle size of 30 nm, a specific surface area of 800 m 2 / g, and a DBP absorption amount of 360 ml / 100 g. The third carbon black has an average primary particle diameter 24 nm, specific surface area 125m 2 / g, a DBP absorption of 165 ml / 100 g. [Selection] Figure 1 |