To All:
Here is an article in the February issue of American Machinist.
Some tabular excerpts from the above article: ======================================================================= The Function of soluble oil ingredients.
Ingredient: Function:
Mineral oil Lubricity, rest prevention
Fatty oils, esters Increases lubricity
Extreme-pressure additives Increases tool life (sulfur, phosphorus, chlorine)
Emulsifiers Allows mixing with water
pH boosters Rust protection, biostability
Biocides Controls bacteria and fungi
Defoamers Controls foam
Antioxidents Prevents oxidation, varnishing
Dyes, fragrances Customer preference
----------------------------------------------------------------------- Characteristics of basic coolant types:
In descending order, does not include the effects of additives.
Lubrication Cooling
Straight oils Synthetics Soluble oils Semi-synthetics Semi-synthetics Soluble oil Synthetics Straight oils
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