On Sep 19, 1:10*pm, Christopher Tidy
wrote:

* The center hole is easily cut with a gasket cutter or leatherwork
punch cutter, and if you can't find a 1" cutter you can make one with
a sharpened piece of pipe. *Or mark it with a compass and use a sharp
pair of scissors, it's only felt and OD cuts are easy...

Do you just hit those punches with a hammer?

Best wishes,

Chris

I have made cutters for gaskets and such on the lathe. I just make
them with a shank that will go in the drill press and use them in the
drill press, both to apply pressure but also spinning to cut the
material.

Dan