On Sat, 30 Jan 2010 22:39:14 GMT, Doug White
wrote:

I found that McMaster Carr has split point parabolic drills in 3/32". I
can get them bright, black oxide or TiN. I suspect they will work better
than the plain point fast twist drills I have now. I found one source that
says black oxide is no good for aluminum, so I will probably try TiN. I
can try coating the drill with a spritz of lube as Ed Huntress suggested.
That will help keep the mess under control.

Doug White

Black oxide is good for ferous metals, aluminum likes to to stick to
it. go with the TiN. Also avoid coatings with Al in them, AlTiN or
TiAlN.

Thank You,
Randy

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