Thanks for all replies, I found the following
after much looking:
http://www.mk-diamond-saws.com/image...tter_small.jpg

and

http://ignitiontools.com/auctionpic/...E-CUTTER-1.jpg

and

http://www.trilug.org/~chilcote/imag...e-cutter-s.jpg

and

http://zenstoves.net/Supplies/CircleHoleCutter.jpg

Regards, Frank



"Ken Grunke"
wrote in message
news
On Fri, 07 Apr 2006 09:27:48 +1000, Peter
Jason wrote:

Need a 9" dia hole in a 20# sheet metal
surround of a boiler.

The hole must be neat and cut in situ.


A makeshift trammel bar of wood (1 x 2" for
ex.) with a tool steel cutter
should do fine with that thin
guage--pivoting on a small bolt.

Or a saber saw, with a circle-cutting guide
and a toothless blade, the
kind with carbide grit available at most
hardware stores.

Ken Grunke


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