GREASE COMPOSITION FOR CONSTANT VELOCITY JOINTS

摘要

A lubricating grease composed of a base oil combination comprising 10 to 35 % of one or more poly alpha -olefins, 3 to 15 % of one or more synthetic organic esters, 20 to 30 % of one or more naphthenic oils, the remainder of the combination being one or more paraffinic oils, the percentages being by weight of the total base oil combination and the ratio of the weight of the ester(s) in the combination to the weight of the poly alpha -olefin(s) therein being not greater than 1:3; between 2 and 15 % by weight of the total grease of a lithium soap thickener; between 1 and 5 % by weight of the total grease of a molybdenum dithiophosphate; between 1 and 5 % by weight of the total grease of a zinc dialkyldithiophosphate; between 1 and 5 % by weight of the total grease of a sulphur-free friction modifier; and some or all of the normal grease additives such as anti-oxidants, corrosion inhibitors, extreme pressure additives and tackiness agents.