coolant for non-ferrous machining

Dear Editor, We have recently launched a synthetic coolant suitable for non-ferrous machining.  We introduced this coolant to one of our customers who agreed to take a trial.  During trial, we observed that the coolant is simply dissolving the slideway lube in the CNC machine.  The slideway becomes totally dry after the coolant leaves the surface.  The customer was scared that his machine parts will be jammed due to this problem and discontinued the trial immediately.  There was no reduction in wash -off of way lube even when we reduced the concentration from 5% to 2.5%.What can be done in such a case? - VS

Dear VS: My first thought is that the coolant is emulsifying the way lube.  This would be caused by the surfactant system in the concentrate.  You mentioned that it was a synthetic is this a water based synthetic or a fluid that contains no mineral oil?  Either way get a sample of the way lube and run a tramp oil rejection test. This test will answer your questions. All Best, Dom