Many materials require some form of lubricant when being used on a CNC machine. A proper coolant is also needed to prevent CNC machines from getting overworked. It is important that you do your proper research in order to find a lubricant and a coolant that will prevent your CNC machine from overworking a piece of material, overheating a work piece, and preventing the work piece’s material from bonding to your CNC machine tool. With that said, be sure you have a proper enclosure on your CNC machine to prevent a mess of liquid. Check out why you need an enclosure here:: The 17 Cent Flood Coolant Enclosure