[Shop-talk] Sheet metal question

[Elton E. (Tony) Clark]

Saber saws can do that chore.  A variable speed unit will allow one to
select an optimal speed to suit the blade and metal.  Use good quality
metal cutting blades but don't be afraid to try some of the coarser blades
for wood;  I once broke my last metal cutting blade and finished a job with
a wood-type blade that cut much better but vibrated and danced around     a
lot . .  Good Luck.
Tony


On 3 June 2013 10:53, Robert Bender <rbender9 at sbcglobal.net> wrote:

> I have a ridiculously old bead blast cabinet that works fantastically well.
> The gloves clamp to a 5-1/2 inch diameter flange, and are now wearing out.
> None of the blast supply places seem to have this size of glove.  They will
> all sell gloves that fit a 7-1/4 inch flange.  Some even sell the retrofit
> flange.  So, I am thinking about how to cut two clean, accurate circles,
> 7-1/2
> inches in diameter in a box made of 14 gage sheet metal.  I don't have
> access
> to a plasma cutter here at home, my nibbler isn't capable of handling the
> thickness, it can't be disassembled to fit into the mill and my Greenlee
> knockouts don't go anywhere near that big.  I suppose I could buy a 7-1/2
> inch
> hole saw, but Google shows $112 and up for something that will likely get
> used
> once. I'll probably end up borrowing Dad's tanks and cutting torch, but
> that's
> a hassle to transport and will require a fair amount of clean up of the cut
> edge.  Any neat out-of-the-box ideas
>  while I talk one of my buddies into buying a plasma cutter that I can
> borrow?
> Bob
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