A manufacturer of automotive components uses different grinding machines in order to grind parts for steering systems. Because of the high quality requirements the surface of the parts has to be absolutely smooth and must not show any scratches and have a uniform micrograph. In order to guarantee the required quality the coolant in the grinding machines has to be as clean as possible. Particles, which are flushed with the coolant between the grinding disc and work piece, may cause scratches or grooves.
In order to keep the coolant as clean as possible, the company used various filter elements with different pore sizes Although the coolant was fairly clean, customer complaints still occurred from time to time due to the surface quality of the parts. The company was looking for a technology in order to remove more or less all particles down to 1 µm at a reasonable cost. The maintenance manager was especially interested in a system, that does not cause high cost for consumables and that does not produce lots of waste.