Ok, as some of you know I am using Bosch Colt Routers as spindles on my Taig and on my MaxNC mills for cutting aluminum. The Bosch Colt routers like most wood routers (all?) have an internal fan that blows downward around the cutter. It fantastic for doing wood work as it blows the sawdust away from the work piece and allows you to see what you are doing. Its even helpful to some degree when doing aluminum work dry as it helps blow the aluminum chips away.
However since I have started using flood lubricant I think it is contributing substantially to oil mist (the Taig is in a full enclosure now and the MaxNC will be when I have time to build one) and wasted lubricant. I still get enough flowing on the cutter to do a great job and wash the chips aside, but whenever I am using a small short cutter you can really see the lubricant fly on the cameras.
There is a cylinder protruding below the fan outlets that I could easily make an air deflector to clamp on so that the air does not blow onto my lubricant discharge nozzle at all, but instead blows outward away from the spindle area. My only concern is that this might restrict air flow to much and cause the router to run hotter than it should. They do run routinely for 7-10 hours non stop.
Wadda ya think? The gap between the deflector and the fan ports would only be about .250" but it would still be all the way around.