In article , Bruce Simpson
writes
On Fri, 29 Aug 2003 01:39:45 +0100, Andy Dingley
wrote:
Use lubricant. Something oily is good. Buy some RTD if you want (it's
gooey enough not to run away from a hole in a wall), but old engine
oil is a lot better than nothing.

Is it?

Not really -- use WD40 instead or, failing that, water applied from a
hand spray. Even if the water doesn't lubricate the drill bit, it will
at least help to keep it tolerably cool.

I must admit that, whilst I've not tried it as a drilling coolant or
lubricant, I have used "I Can't Believe It's Not Butter" [1] when
turning stainless steel; it seemed to work reasonably well, though the
workshop stank like a chip shop for days afterwards.

[1] I'd bought two tubs in a B.O.G.O.F. supermarket promotion and, on
tasting it, I soon decided I'd been overcharged on both. There again,
I'd doubt that anyone could pay me enough to *eat* the stuff...

--
Paul