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Extreme pressure additives, or EP additives, are additives for lubricants with a role to decrease wear of the parts of the gears exposed to very high pressures. They are also added to cutting fluids for machining of metals.
Most metalworking and machining processes can benefit from the use of cutting fluid, depending on workpiece material. Common exceptions to this are cast iron and brass, which may be machined dry (though this is not true of all brasses, and any machining of brass will likely benefit from the presence of a cutting fluid). [1]
Tricresyl phosphate (TCP), used for high-temperature operation, often used as an AW and EP additive in turbine engine lubricants, and also in some crankcase oils and hydraulic fluids; Halocarbons (chlorinated paraffins), for extreme pressure operations; Glycerol mono oleate
Quaker acquired ECLI Products, [9] a high-tech automotive greases manufacturer and Binol AB, [10] a Swedish manufacturer of environmentally acceptable lubricants for the metalworking, forestry and sawmill industries. In 2015, Quaker acquired Verkol S.A., [11] Spain. And in 2016, Lubricor Inc. in Canada. [12]
Lubricants are sometimes used to cool the workpiece and wheel, lubricate the interface, and remove swarf (chips). It must be applied directly to the cutting area to ensure that the fluid is not carried away by the grinding wheel. Common lubricants include water-soluble chemical fluids, water-soluble oils, synthetic oils, and petroleum-based oils.
There are a variety of lubricants available for this task. They include plant and mineral oil-based, animal fat or lard-based, graphite -based, soap and acrylic-based dry films. The newest technology in the industry is polymer-based synthetic lubricants also known as oil-free lubricants or non-oil lubricants .