Advice on tool cooling

[Jonathan]

The other big advantage of not cutting dry is that coolant or oil lower the coefficient of friction between the tool and material, so less heat is generated to start with. That's partly why even a small amount of 'something wet' can make a big difference.

[Gasgasbones]

Cheers fellas.

I use WD40 on my manual mill but after a while it leaves a sludgy swarfy mess in the T grooves which are a pain to clean. I wanted to avoid this on CNC if poss so hoped air would help.

I have a large compressor but its in shed 2 and shed 1 with the CNC won't fit it in :-)
I'll try a combination of the small air supply and WD40 and see how I get on.

cheers fellas,

carl