Advice on tool cooling

[JohnHaine]

An alternative to wd40 which I find is a little hard to control is a mixture of cutting oil and paraffin applied with a brush. Also cheaper!

[magicniner]

I use a refrigeration compressor on the receiver, plumbing and electrics from a portable compressor with a failed motor/compressor unit.
I formed a nozzle in the end of a short length of copper brake pipe by crimping the end in a 3-jaw chuck with piano wire up it to keep a small path open.
When I want lube in addition to chip clearance I add a drip-oiler with 70/30 Parafin/Oil directed onto the outside of the copper pipe a couple of inches up from the nozzle, the resulting coarse droplet mist doesn't travel and doesn't cause slurry or stop chip clearance,

- Nick