I wanted to make a worry ring, using 22 ga sheet for the base. I
knew that the final size was to be an eight, and since I was going to
plannish (? hammer the heck out of it) it, decided to start with a
size 7 1/4.My math is just plain wrong, and I need help please, as I
ended up starting with a size 6 and a half.Here’s what I did:The ring
blank was 9mm wide, and since I wanted a starting size of 7 1/4, I
took 54.7 mm and added 2(.73) for two times 22 ga thickness (this is
obviously where my math is wrong - ha! ), and got 56.16mm. I decided
to be a bit generous and round up to 58 mm, to allow for filing of
terribly crooked ends. Soldered the ring such and promptly ended up
with a 6.5… Can someone help me with the correct formula? Or
point me to a resource? I have a book with a table, but doesn’t go as
thin as 22 ga, so I still need to know how to calculate correctly.
Thanks soooooo much!