Cooling lubricant containing mineral oil, water-immiscible. Consisting of solvent refined, low-aromatic mineral oil fractions, modified greasy oils and anti-wear additives containing sulfur. Provides excellent protection against corrosion, is stable to aging and does not tend to oil mist and foaming. Excellent for machining free-cutting steels and aluminum alloys as well as for machining unalloyed and alloyed case-hardened, Q & T and structural steels. Machining operations on cast materials and demanding gear cutting work, including gear grinding, can be carried out without any problems. Enables excellent surface qualities and long tool edge life.