"RicodJour" wrote in message
oups.com...
spudnuty wrote:
George E. Cawthon wrote:
Martin wrote:
I'm trying to make a special gasket out high density foam rubber.
Actually
I'm using a kid's 4oz practice hockey puck as the blank. It's 1"
thick and I
need to make a 1" hole in it's center. Does anyone know of type of
bit or
other type of cutter that would make a clean cut. The common bits
and step
bits just rip it up.

2. I also think the above poster might be right about the reversed hole
saw. You might also be able to compress the puck between two sheets of
ply and hole saw through the sandwich.

No need for the plywood. It's the same idea as reversing the saw blade
in a circular saw when cutting vinyl siding. It works fine. It's
simple.

R

I think that reversed hole saw might work if sufficiently lubricated say
with soapy water; this foam has an awful drag. Problem is I don't have that
kind of equipment here. But it did put me in mind of another hole cutter:
the cork borer that used to be used in laboratories; basically a simple die
cutter that was worked by hand. I could probably make one from sharpened
3/4" copper pipe which would give me an OD of about 7/8", close enough for
my purpose.