On Wed, 14 Mar 2012 20:20:58 -0400, Spehro Pefhany
wrote:

On Wed, 14 Mar 2012 19:00:51 -0500, the renowned Karl Townsend
wrote:

On Wed, 14 Mar 2012 15:42:31 -0400, Spehro Pefhany
wrote:


Looking at using some relatively small screws tapped into (probably)
6061 aluminum. Through holes, maybe 0.08" of material. Is it insanity
to think about using a cordless hand drill and run them right through
without backing off (assuming a good quality coated tap and aluminum
cutting fluid)?

I took the handle off a tap wrench and then pressed a 3/8 socket on
the end. Then I use a speed wrench for the handle. Holds the tap nice
and square. I can't remeber *ever* breaking a tap with this, haven't
went 0-80 but i wouldn't be afraid to have you try it VBG

Karl

One of those offset handle things? That's REALLY scary.


Yep. I like it. Got the idea here when I had a about a zillion taps to
do in an electric panel. I found it fastest to have a drill for the
holes and the speed wrench tap. better than two drills. I did a fair
amount of 4-40 nothing smaller for my experience.

YMMV

Karl