Drilling and tapping 200+ 3/8" holes in 3/4" aluminum
On Sun, 26 Sep 2010 21:23:33 -0500, Ignoramus24898 wrote:
On 2010-09-26, Karl Townsend wrote:
Spot drill if you need to hold +/- .002 location, stub drill maybe +/-
.005, regular drill maybe +/- .010 or worse. So how accurate determines
answer.
I will use a spot drill indeed. Full diameter holes with spot drill,
perhaps 1/8" deep, to provide guidance for the regular drill.
Is a "spot drill" the same thing as a "center drill"? (it kind of sounds
like it, from Karl's info here.)
Thanks,
Rich
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