A grease composition comprises a base oil and an aluminium complex soap thickener, with graphite, molybdenum di-sulphide, calcium carbonate and bismuth sulphide all included as additives. The composition exhibits advantageous load, wear and friction performance, especially in extreme pressure environments, and is particularly suitable for use on open gears.

A lubricating grease composition for a polyamide resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member. The lubricating grease composition for a polyamide resin member contains a base oil which is a synthetic hydrocarbon oil, and a thickener which is at least one metal complex soap of a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40 C. of the base oil ranges from 30 to 200 mm.sup.2/s and a drop point of the thickener is 270 C. or more.

A lubricating grease composition for a polyamide resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member. The lubricating grease composition for a polyamide resin member contains a base oil which is a synthetic hydrocarbon oil, and a thickener which is at least one metal complex soap of a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40 C. of the base oil ranges from 30 to 200 mm.sup.2/s and a drop point of the thickener is 270 C. or more.

A lubricating grease composition for a resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with an other member. The lubricating grease composition for a resin member contains a base oil which is a mixed oil of a poly--olefin having a kinetic viscosity at 40 C. of 18 to 50 mm.sup.2/s and an ethylene--olefin copolymer having a number average molecular weight of 40,000 to 200,000, a lithium-based complex soap as a thickener and a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition, wherein the base oil has a kinetic viscosity at 40 C. of 80 to 200 mm.sup.2/s and a worked penetration of the lubricating grease composition ranges from 265 to 340.

A lubricating grease composition for a resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with an other member. The lubricating grease composition for a resin member contains a base oil which is a mixed oil of a poly--olefin having a kinetic viscosity at 40 C. of 18 to 50 mm.sup.2/s and an ethylene--olefin copolymer having a number average molecular weight of 40,000 to 200,000, a lithium-based complex soap as a thickener and a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition, wherein the base oil has a kinetic viscosity at 40 C. of 80 to 200 mm.sup.2/s and a worked penetration of the lubricating grease composition ranges from 265 to 340.

Grease wear test device includes a body in a form of a collar having an outer surface, a first side and an opposing second side, which are open to form a hollow, open channel through the body, which has a center axis, into which opposing vee blocks can be inserted; and perpendicular to the center axis, a pair of opposing holes through and open to the outer surface of the body and the cylindrical inside wall, through which a cylindrical test journal (falex pin) can be inserted for contact in general with opposing vee-shaped channels of the inserted, opposing vee blocks, and for rotation during testing. The device can be used to modify a falex pin and vee block device, to receive and contain a small sample of grease or another organic paste product for testing such as a modified version of an ASTM D2670 test method for measuring wear properties of fluid lubricants (falex pin and vee block method).

The present invention relates to the use of a salicylate additive for increasing the electrical conductivity of a grease composition comprising at least one base oil and at least one thickener. The invention also relates to a grease composition comprising at least one base oil. at least one polyurea thickener and at least one salicylate additive.

The present invention relates to the use of a salicylate additive for increasing the electrical conductivity of a grease composition comprising at least one base oil and at least one thickener. The invention also relates to a grease composition comprising at least one base oil. at least one polyurea thickener and at least one salicylate additive.

A sliding mechanism includes first and second members slidable relative to each other and a grease composition interposed between the first and second members and containing a thickening agent and a base oil, wherein the grease composition contains lithium 12-hydroxystearate as the thickening agent and dioctyl sebacate and/or poly--olefin as the base oil; and wherein at least one of the first and second member has a sliding surface coated with a hard carbon film of diamond-like carbon.

A grease composition includes a base oil, a thickener, and a styrene-based block copolymer containing ethylene-alpha olefin copolymerization repeating units as a first polymer additive, wherein 1.5% to 15% by weight of the first polymer additive is contained based on a total weight of the grease composition.