Video of my DIY Mist Coolant setup

Mid Day Machining said:
Spray mist doesn't don't really cool your part, they lubricate the cutter.

Misters work good for profiling and surfacing, but they don't work that well for drilling and pocketing.

I have a dual nozzle Fog Buster on my machine running output pressure of 12 PSI and it works great for what I do.
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MidDay, I don't fully agree with what you are saying about Misters not cooling. I run a dual nozzle Fog buster also and find that it does provide some cooling. Probably through the expansion of the pressurized air and also some evaporative effect. I agree that it might not be huge amounts but I think it is enough to mater. I think the biggest value is the air blowing chips away from the cutter so they are not re-cut and possibly a little bit of lubrication. I run mine at around 20psi and pretty much only cut Aluminum and occasionally 360 Brass.
 
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