Wow. I'm glad I just started reading this group. What a helpful bunch here!
I'll the the original poster would never have thought about looking it up.

Steve Robertson
N4732J 1967 Beechcraft A23-24

Orval Fairbairn wrote:

In article ,
(Ded Dog) wrote:

what rpm range best for aluminum sheet metal? 2600? 3600? less? more?
thanks KM

It is all a function of drill size -- available in metalworking books.