To provide an electrically conductive grease composition exhibiting high electrical conductivity and lubricity and hardly causing oil segregation, and also hardly causing its leakage when used in rolling devices including roller bearings, and to provide such a rolling device exhibiting high electrical conductivity and durability and also hardly causing the grease composition's leakage.
The rolling device is such that the electrically conductive grease composition G is sealed up in the cavities of a deep-grooved ball bearing. The electrically conductive grease composition G comprises a base oil consisting mainly of a fluorine oil, a thickening agent and an electrically conductive zinc oxide 10-100 nm in average primary particle size, wherein the content of the zinc oxide is 0.1-10 mass% based on the whole electrically conductive grease composition G.
Yoshiaki Naito
Cui Shu Tetsu
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