On 2010-04-24, JR North wrote:
Forget the S/D drills and hole saw ideas. You need this:

http://www.harborfreight.com/cpi/cta...emnumber=96275

Might even get to 1" if you drill slow.

Perhaps -- though I'm not sure whether these are made from a
real HSS (as claimed) or one of the Chinese alloys which are not as
good. TiN is good for wear on a good strong steel, but on a poorer
quality steel is just gilding. I would be more likely to trust the
ones by Klien which I posted some pointers to in a previous (but recent)
response to this thread. Yes, it costs significantly more for the one
bit which I suggested, but that one bit is likely to last through all of
the (80+) holes you need to drill, while these may not.

Still -- use the high sulfur pipe threading oil as
coolant/lubricant. Paint it on the cutter before each cut since you
don't have flood coolant.

Good luck,
DoN.

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