I received a Spra-Kool Midget mist spray unit and hooked it up this weekend. I'm using the Kool Mist 77 coolant, mixed appropriately with water. The sprayer delivers an astonishing amount of fluid - I'd read stories about the air fogging, about very little coolant making it to the work, etc, and expected that I wouldn't have any actual water remaining after the mist was delivered, but I'm getting a very significant stream of fluid directed at the cutting tool and work - which is the point, I suppose. :-) (My next, immediate, plan is to build one of the electric modulation units - to partially undo some of this effectiveness... :-)
At any rate, its clear that I'm going to have to build some type of collection pan under my mill to catch the fluid. (the advantage being that I can actually reuse the fluid) My question at the moment is, how concerned should I be about the water component of the fluid rusting my Taig mill frame and feet, as well as lead screws, ways, vise/clamps, etc? There's an awful lot of water being distributed about (to include on the z-axis ways, with cutting debris - I need to find a way to shield those), not to mention that if I basically sit the mill in a collection pan, it'll be sitting in water while I'm using it.
This definitely beats hovering over my workpiece with a can of WD-40, but clearly is not without its own complications!
Thanks for any help/advice!!