Slideway lubricants
AssigneeAfton Chemical Corporation
InventorsPaul Norris, Ralph Lumby
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Abstract
The present disclosure relates to lubricating oil compositions, and in particular, lubricating oil compositions for slideway applications, additive compositions for the slideway lubricants, and methods of lubricating a machine part, such as a slideway with the lubricating oil compositions. In one aspect, the lubricating oil compositions have a composition that provides both good friction performance and good separability from metal working fluids at the same time.
Claims13
A slideway lubricant composition exhibiting good friction performance and good separability from metal working fluid at the same time, the slideway lubricant composition including
- a major amount of a base lubricating oil;
- a phosphorous containing friction modifier providing 0.025 to 0.04 weight percent of a hydrocarbyl phosphonate monoester to the slideway lubricant composition;
- the hydrocarbyl phosphonate monoester including a C1 alkyl group in the monoester moiety and 18 carbon atoms in the hydrocarbyl moiety;
- 0.14 to 0.4021 weight percent of a dioleyl hydrogen phosphite;
- and
- wherein the slideway lubricant composition has a lower friction coefficient than a slideway lubricant composition including a phosphonate diester instead of the hydrocarbyl phosphonate monoester and also has an average one hour SKC Separability from metal working fluids lower than 2.
Dependencies are inferred from the claim text.