Patent ID: 7786058

Claim:
A rolling device characterized by employing a lubricating grease composition comprising: a thickener which is a mixed thickener comprising a mixture of (a), (b) and (c): (a) one or more diurea compounds which are one or more aliphatic diurea compounds having an average molecular weight of 635-676.3 in which 27.2-56.9% by mole of the linear hydrocarbon groups are unsaturated components, the aliphatic diurea compounds having been produced using as a raw material one or more primary amines selected from the group consisting of capryl amine, stearyl amine, beef tallow amine and oleyl amine, with a diisocyanate of the following formula: (b) at least one of a lithium, calcium and aluminum fatty acid metal salt of at least one selected from the group consisting of 12-hydroxystearic acid and stearic acid, and (c) at least one amide compound selected from the group consisting of aliphatic N,N′-ethylene bisstearamide and stearamide, the proportions of (a) and of (b) and (c) satisfying the relationship: a /( b+c )=0.625−2.75 provided that (1) the proportion of ingredient (a) is 1.43-8.25, (2) the proportion of ingredient (b) is 1.26-2.0, and (3) the proportion of ingredient (c) is 1.0-2.0, the amount of the thickener being 11.0 to 15% by weight, based on the lubricating grease composition; (d) a base oil which is a lube base oil having a pour point of −36 to −67.7° C. and comprising a synthetic hydrocarbon oil as the main component; and (e) an additive which is a mixture comprising an organomolybdenum complex, an organozinc compound of a dithiocarbamic acid, and an organozinc compound of dithiophosphoric acid, the amount of the additive being 3.25-4.5% by weight, based on the lubricating grease composition.