I go to 12-step meetings. Sometimes they hand out coins to commemorate years of abstinence. For a long time I've had the idea of making a keyring which would be bored to just hold one of these coins. I finally worked up a design which I've figured out how to make from sheet brass:I make these manually on a milling machine. If there's a better way to make them (absent CNC equipment) I'd love to know about it. It basically boils down to a tricky workholding problem. I have a solution, but I'm wondering if there's a better one. Thus the question: how would you make these parts?
The dimensions aren't particularly significant, but the large hole diameter is 1.354" and the small hole is a #10 hole. The brass is 1/8" sheet brass.
Sorry for the fuzzy picture.
Grant Erwin Kirkland, Washington