3/8" hole punch?

[Harry Bissell]

I dont know WHY you don't want to drill, but IMHO the best way to enlarge a hole in
sheet metal is with a STEP DRILL. These have increasing diameters that go up in
steps of 1/8" or 1/16" (hence "step" drill). They look like a cone in shape,
available at any really good hardware store for about $20-30. You will use it
forever (unless you try to drill boilerplate). It leaves a very smooth hole and
won't chatter like a normal drill bit. It can be used easily in a hand drill (no
press required). It will leave chips...

Strp drills come in sizes from 1/8" to 1/2" in 1/16" steps, and some (hard to find)
go up to more than 1"

Hope this helps...  :^) Harry

Edu Silva wrote:

> WeAreAs1 at aol.com wrote:
> >
> > I'm doing some modifications to my mixing board (Yamaha RM2408) and I need to
> > make a lot of 3/8" holes (0.375 inches, or 9.5 mm) into which I will mount a
> > bunch of 1/4" jacks.  For a few reasons, I would much rather use a chassis
> > punch than drill the holes.
>
> <snip>
>
> > If anyone knows of a tool supplier or manufacturer that has what I'm looking
> > for, or know of some trails to follow, please let me know.
>
> Not sure, but you can try  http://www.techni-tool.com
>
> Edu Silva
> ES2 Audio
> http://audiolist.cjb.net