Thursday, November 13, 2014
Coin Ring Hole Exactly Centered - Secret Revealed
Now you can accomplish this one of two basic methods. You can punch the hole with a punch and die set; or alternatively you can drill a hole in it. Or, I suppose you could punch a small hole and then drill it out to make it larger. In either case, you end up with a hole in the coin which then makes it possible to fit it over the end of a tapered mandrel.
Well, I promised to reveal the secret of "the exactly centered hole"; and so I shall. There is no denying that producing a coin ring with precisely the same width of band around the entire circumference - does in fact ideally require that the hole be positioned exactly in the center of the coin. However, the secret is; the hole really can be off from exact center and still the coin ring can be fashioned with the same width of band around the entire circumference. Thus, it is entirely fool-hearty to obsess over the task of exactly centering the hole. The reason it is not that important is because the ring maker has at least two separate opportunities to fix an off-center hole before the ring is completed.
The first is done with a round file before the forming process is started. At this point, the maker/artist merely files the off-center hole until it is slightly larger and centered.
The second is done with a flat file after the forming process is completed. The flat file is used on the cut edge to adjust the ring width until it is the same all the way around.
Both of these methods work extremely well - and are obviously a great deal cheaper than investing in expensive machined hole-punching devices.