| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive grease composition capable of imparting excellent electrical conductivity, low torque and high durability even under high-temperature, high-speed and high-load conditions and provide a rolling device having excellent electrical conductivity, low torque and high durability even under high-temperature, high-speed and high-load conditions and producible at a low cost. SOLUTION: A deep groove ball bearing comprises an inner ring 1, an outer ring 2 and a plurality of rolling members 3. A grease composition G to lubricate the deep groove ball bearing is sealed in the space formed between the inner ring 1 and the outer ring 2 and provided with the rolling members 3. The base oil of the grease composition G is at least one substance selected from synthetic hydrocarbon oils, ether oils and ester oils, and the thickening agent of the composition is a urea compound. The composition is further incorporated with two or more kinds of conductive carbons having different average particle diameters. The total amount of the conductive carbons is≥1.5 mass% and≤20 mass% based on the total mass of the grease composition G. COPYRIGHT: (C)2008,JPO&INPIT |
