Coolant Oil
Metalworking fluid is the name given to a range of oils and other liquids that are used to cool and/or lubricate metal work-pieces when they are being machined, ground, milled, etc. Metalworking fluids reduce the heat and friction between the cutting tool and the work-piece, and help prevent burning and smoking. Applying metalworking fluids also helps improve the quality of the work-piece by continuously removing the fines, chips, and swarfs from the tool being used and the surface of the work-piece.