Can Die Rotation Happen In Coins With Sides?

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Author	Replies: 5 / Views: 1,503
Altaira Pillar of the Community Canada 2519 Posts	Posted 12/07/2014 8:33 pm I often see slight die rotation on round coins like nickels or nickel dollars. Can this also happen on coins with sides? I was looking at some 12-sided pennies and none of them seem to be rotated. How about on loonies? I googled it but the only result that came up was an altered coin similar to a Magician's coin. Report this Post to the Staff

SPP-Ottawa Moderator Canada 10460 Posts	Posted 12/07/2014 9:04 pm Sure... the rotation between the anvil and hammer die can still happen. Remember that it is the collar die, that shapes the older 5-cents, 1-cent coins and the loon dollar. "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
Vancouver IslandCoinKid Forum Kid Canada 1074 Posts	Posted 12/08/2014 12:54 am yes they can still happen! Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 12/08/2014 7:02 pm So the rotated die can just slam itself into the collar again and again while making a coin with designs that are off the coin? Here's a hypothetical four-sided example, because I'm not going to draw 12 sides, that's too many. Report this Post to the Staff
Sap Moderator Australia 16849 Posts	Posted 12/08/2014 8:17 pm It does depend on the country. Australian 50 cent coins, for example, are struck on dodecagonal-shaped blanks. While any degree of rotation is possible, the most commonly encountered ones are the exact multiples of 30 degrees, so the sides line up again perfectly. Example with 30 degree rotation. In your hypothetical square coin, only multiples of 90 degree rotations are "stable". Rotations at any other angle are likely to result in a mangled coin that gets stuck in the dies, so they're much harder to come by. What you can also get when you use blanks that are pre-shaped is a misalignment or upset of the blank itself in the dies. This can look much like what you might expect a slightly rotated die to look like, except of course the dies aren't rotated and you can see damage on both sides of the coin. Example. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
Altaira Pillar of the Community Canada 2519 Posts	Posted 12/08/2014 10:58 pm So that's why I don't find slightly rotated ones. I'll keep an eye out for a "stable" one. If the coin is not round, then the planchets are not round too? Including the last copper pennies which are almost round? Report this Post to the Staff
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