Lubricant Grease
Lubricating grease is a base oil held by a thickener, plus additives. It stays in a bearing or joint where oil would run off.
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What lubricating grease is
A grease is three parts. The base oil is mineral or synthetic. The thickener is a soap, such as lithium, or a non-soap, such as polyurea or clay. Additives handle water, wear, and corrosion.
The NLGI number is the stiffness. A lower number is softer. NLGI 2 is the common multipurpose grade. Grease is chosen for the bearing, the temperature, and whether water or a seal is involved.
Lithium Grease
Simple lithium soap is the common automotive and machinery thickener. Lithium complex is the high-temperature version. White lithium grease is this lubricant, not choice white grease.
General Purpose Lithium Grease · Automotive Lithium Grease · Wheel Bearings · Lithium Lubrication Greases
Red Grease
Red grease is usually a dyed lithium complex grease sold for higher temperature. The color is a dye, not a temperature rating.
Aerospace Grease
These greases are specified for aircraft and space equipment.
Aerospace Grease for Space Equipment · Chemours Krytox · Shell Grease Lubricants · Aerospace Grease
Silicone Grease
Silicone grease is used on rubber, O-rings, and plastic, where a petroleum grease can swell the seal.