On Jun 26, 1:35*pm, Bob Engelhardt wrote:
...
2. *What is the purpose of cutting oil? *I remember reading that it
allowed chips to flow off the cutting edge more easily. *Is that it?

Bob

I've noticed that drill bits sometimes cut a thicker chip for the
handle pressure after the oil is gone and the bit and work heat up. I
add more on the theory that oil helps prevent chip jams and breakage.
When the bandsaw blade is gets dull enough it will only cut completely
dry. Lube wax makes it skate.

jsw