SOLUBLE CUTTING OIL:
Soluble and semi synthetic cutting oils are emulsifiable in water and are used in light to heay duty operations. These products are a blend of refined mineral oil, emulsifier, additives and suitable bactericides which can be used for ferrous and non ferrous metals. These are not recommended to be used for machining of magnesium and its alloys due to risk of fire hazard.
These are further categorized as:
General purpose soluble cutting oil - consists of mineral oil, emulsifier and other additives. Widely used in industry and are least expensive.
Semi synthetic oils - contain mineral as well as synthetic components to meet lubrication and cooling requirement of certain operations.
Preparation of soluble oil emulsion
In preparing the emulsion of soluble oils with water, always add the oil to the water (and not vice/ versa to prevent inversion of emulsion.) The requisite quantity of oil is to be added to two to three parts of water to prepare concentrated emulsion. This can be diluted by adding it to requisite quantity of water in the tank.
To achieve the optimum performance of the soluble cutting oil: