Soluble Cutting Oil

soluble cutting oil

[′säl·yə·bəl ′kəd·iŋ ‚ȯil]
A petroleum oil containing an emulsifying agent to make it mix easily with water; used as a coolant for metal-cutting tools.

Soluble Cutting Oil


a complex composition based on mineral oils and surfactants.

Upon mixing with water, soluble cutting oils form stable colloidal disperse systems or micelle solutions containing water-insoluble components in the solubilized state (seeSOLUBILIZATION). Petroleum oil generally makes up 40–80 percent of a soluble cutting oil; soaps or soaplike surfactants make up another 10–30 percent. The soaps or soap-like surfactants, which may be, for example, sulfonates, oxyethylated alkylphenols, or aliphatic acids, act as emulsifiers and solubilizers. In addition, soluble cutting oils may contain alcohols, polyethylene glycols, various types of additives, bactericides, water, and, sometimes, highly dispersed solids.

Various types of soluble cutting oil are produced in the form of concentrates that yield cooling lubricants when diluted with water.


Kurchik, N. N., V. V. Vainshtok, and Iu. N. Shekhter. Smazochnye materialy dlia obrabotki metallov rezaniem. Moscow, 1972.


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