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 suc

Dear Sir; I am a chemist at an aerospace industry in Israel.  Lately we have been experienced problems with corrosion when machining aluminum parts 7xxx.  We suspected the water to be the main reason as we use only tape water with 350ppm CaCO3 and 210ppm chlorides.  We noticed that the problem is more acute in winter.  We are going to move to deionized water.  Can you give your opinion on the phenomena and can you advice us about changing to deionized water. Sincerely Yours,  MY

Dear Editor,  I am having problems with my MWF staining the parts I make in my VMC.  I only make part from QC-7 aluminum.  I have been having trouble with this for over a year now.  I have had may different brands a coolant in my machines, each time I would remove the old coolant and clean the machine and put new coolant in.  Each time now with the same result.  I use DI water with oil based or synthetic, I have sent countless samples to many labs and they all say everything is normal.  I get a kind of  hazy film all over my part.

I have a customer that is using a light visc oil with a touch of fat to grind a chrome tube.  He is generating a lot of smoke and would like to try a different oil.  What type of product should I have him try?