I struggle to use a similar device to cut small circles (BT-20 size, for instance) in thick cardboard/wood fiber material. For me, the biggest problem is the plastic bending during the circle cut resulting in a circle that's smaller (usually) than what it should be.
This looks nice but I need to cut holes as small as BT-5 and BT-20 size. BT-20 is .736 inches in outside diameter. Too small! :-(
A hollow punch set might help if you can find one with the right ID for thr discs you want. These work well on chipboard and thin wood stock.
It is hard to cut through thick cardboard. I tried making some rings last year starting with some cardboard that I had glued together to make it thicker. It took many passes and by the time I had cut all the way through the edges were somewhat frayed. I actually cut most of the way through one side then turned it over and cut the rest of the way through from that side.
Nice cutter for BT60 inner to bigger BT centering rings but its minimum diameter circle it can cut is 1.5"
I wish there were bigger punches in the set. Only goes up to 1/2 inch.
Where do I get said large circle leather punch?
Might want to consider a scroll saw. A lot faster and dense cardboard can be almost as tough as light ply when using a knife.
Any Leather Supply Company. Tandy, Weaver, Springfield, C.S. Osborne. General Tools makes a set for about $75 on Amazon. If I ever have the money I'll be buying one. If you don't know how to polish so they don't stick, check out Springfield Leather Company's You Tube Page for their video on sharpening. I think it's a must see for everyone because it address everything from an X-Acto blade to Kitchen Knives.
