Processing of metal parts on machine, dripping coolant. In factory machine processing blade processed detail which is very fast spin. A blade grinder is made of a harder alloy than blank, this allows it to cut through a thin layer of dark metal and leave a shiny surface. To improve work to work area served lubricant cooling fluid. It drips on treated area and thus cools it. Chips flies from place where blade of machine in contact with the workpiece.