Claude Hopper wrote:
Walter R. wrote:
I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.

I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
It's a tedious job to drill a 1/2" hole and then use a file to enlarge it to
3/4".

Any easy way to do this without getting blisters?

Thanks


I myself have a set of twist drills by Silver and Demming that go up to
an inch and have 1/2 inch shanks.


Actually Silver and Deming is simply the name for that type of reduced
shank drill bit (that is, a bit with a 1/2" shank, 6" OAL, and 3"
flutes) unless they are real antiques. I say the latter because I
presume (without any proof) that they must have been originally made by
a company of that name.

nate

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