| abstract |
The device uses barium sulfate, which is superior in terms of material cost in addition to safety and environmental load, as a lubricant used in constant velocity joints, bearings, gears, etc. operated under severe conditions. Providing grease compositions with excellent wear resistance and flaking resistance. SOLUTION: I) 0.3 to 25% by mass of barium sulfate, (II) 0.1 to 5% by mass of ashless sulfur compound, and / or (III) dithiocarbamate and / or dithiophosphate. And a grease composition containing 0.1 to 10% by mass. The barium sulfate has an average secondary particle size of 100 μm or less, the ashless sulfur compound is a mercaptan and / or a nitrogen / sulfur-containing heterocyclic compound, and the metal element of the component (III) is molybdenum and / or zinc. A grease composition. [Selection figure] None |