Use high quality, stable cutting, and grinding fluids. Use demineralized water for mixing purposes to avoid emulsion deterioration, corrosion and microbial growth. Regularly clean metalworking fluid through filtering or centrifugation. Periodic addition of specialized biocides can also extend fluid life by combating microbe growth. Consider using synthetic metalworking fluids.
Many synthetic fluids offer greater thermal stability at high temperatures.
Consider using air rather than, or as a complement to, fluid coolants. Air cooling avoids workpiece and tool contamination. Select fluids with an overall, plant-wide perspective to find the most versatile products, thus minimizing the number of different fluids in use. It is sometimes possible to use just one kind of high quality fluid in an entire plant, although different applications may require different proportions of water and concentrate. Regularly test fluids to detect deteriorating fluid qualities prior to failure.