I just sold a bunch of old money I had. I kept few coins and bills to give to the grand kids. I want to display them in a frame. What I need to do is cut some holes, in poster board, to set the coins in. I need to cut perfect circles, no ragged edges. The diameters I need are 1.51, 1.21, .959, .848, .764, and .712 inches.
I tried drawing the circles and cutting free hand but that sure didn't work. I have thought about a compass with an Exacto Knife clamped in it but, I don't think I could do a circle that small with enough precision.
The members of Trapperman seem to possess infinite knowledge. Does anybody have an idea as to how I could cut these circles?

If you go to a shop that sells scrapbook supplies, many of them have programmable cutters, that should be able to perfectly cut the holes, cheaply and quickly.

Keith

I am not sure if they still make them but there used to be on the market what I would call and adjustable hole saw kit.
These you could fit to the size you wanted and drill away.
You may be able to locate some Forstner bits at a wood working supply company. I may not be calling them by the proper name. These bits drill a round hole with a flat bottom.
Hope this helps.

I thought about both of those. I doubt, very much, if I could get Forstner bits the exact size I need. As far as a hole saw, I'm afraid it would leave a very rough edge.

Could use metal conduit to 'punch' holes but finding all the proper sizes would be a pain.

Check out an adjustable "Trepan" hole cutter, aka circle cutter. A trepan is a single point hole drill for drill press' or milling machines, with a center drill to locate and keep it true, and a single point lathe bit to cut. Google it.

Check out leather punch sets. Might be able to get the sizes you need.
type this in on Amazon

Anytime Tools 13 pc Sharp Hollow Punch Tool Set for Leather and Gasket 3/16" - 1-1/4"

Check out a coin collecting forum bet they know

This circle cutter may do what you want to do.

Clear Cut Cutter Ic-1500p Enuti Yen- https://www.amazon.com/gp/product/B001OYA8C6/ref=ask_ql_qh_dp_hza

One of the questions answered indicate it will cut circles from 1.8 CM (0.70 inch) to 17 CM (6.69 inches).

It is also available at Fiskars- https://www2.fiskars.com/Products/Crafting-and-Sewing/Craft-Knives-and-Blades/Circle-Cutter

We have an old gasket cutter, I would suspect you could still get at a parts store. Just make sure you go to one that has parts people that know more than their name.

My wife bought a Cricut. It's s $200 vinyl cutter for making vinyl signs. Crafters use them to make all kinds of things. It draws like a plotter, and cuts any shape you can put on the computer. She makes T-shirts, coffee mugs, signs that are hanging all over my house now, even lettered my boat. It keeps her busy and it only cost $200. I think I've bought lots of accessories for it since then.

It's a lot more expensive than an exacto knife but it would probably do what you want.

Looks like somebody already figured out how to do this. https://www.amazon.com/circle-mat-cutter/s?k=circle+mat+cutter

Most leather shops have punch's that could do the smaller sizes. Have heard of the Cricket cutter's as well

Some of my larger holes I've used conduit and filed the edge's sharp just like a hole punch, they work very well on leather, paper might even be as good with a flat surface underneath.

My wife has a cricket, and they are the cats meow. Bet someone you know does that scrapbooking stuff and can fix you up. That's where my wife is tonight, she does that a couple times a week.