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<p>[QUOTE="Conder101, post: 7789766, member: 66"]What the OP is basically describing is a coin struck on a blank and not a planchet. The blank is the same size or possibly a tiny bit larger than what the finished coin would be. Normally when it would go through the upsetting machine that creates the "proto-rim" the diameter is reduced to slightly LESS than that of the finished coin. This allows the planchet to drop easily into the coining chamber, and then the force of the strike causes it to expand outward and fill the collar.</p><p><br /></p><p>In the case of a blank it does NOT fall easily into the chamber. Instead it is forced into the collar by the hammer die. It could go in slightly tipped. it could create an off-center strike, or it may just get pushed in in a centered fashion. But I would expect the rims to be weak on the finished coin because it doesn't have that added thickness around the rim created by the upsetting machine.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 7789766, member: 66"]What the OP is basically describing is a coin struck on a blank and not a planchet. The blank is the same size or possibly a tiny bit larger than what the finished coin would be. Normally when it would go through the upsetting machine that creates the "proto-rim" the diameter is reduced to slightly LESS than that of the finished coin. This allows the planchet to drop easily into the coining chamber, and then the force of the strike causes it to expand outward and fill the collar. In the case of a blank it does NOT fall easily into the chamber. Instead it is forced into the collar by the hammer die. It could go in slightly tipped. it could create an off-center strike, or it may just get pushed in in a centered fashion. But I would expect the rims to be weak on the finished coin because it doesn't have that added thickness around the rim created by the upsetting machine.[/QUOTE]
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What happens with an oversized planchet?
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