Most grinding is conducted either with water-based oil-in-water emulsion or with a neat mineral oil or neat synthetic oil using a low-pressure delivery system. The functions of a grinding fluid are introduced and typical systems for grinding fluid delivery are described. Grinding fluids provide bulk cooling and also process cooling. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.