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<p>[QUOTE=&quot;physics-fan3.14, post: 4947386, member: 19165&quot;]Not really. &quot;Chamfered&quot; would imply that the edge is intentionally bevelled. Some coins do have intentionally bevelled edges, but most do not. On a proof coin, the actual creation of the planchet is done differently - the edge is intentionally squared. </p><p><br /></p><p>On a business strike, the coins are rolled in the cleaning chamber, they are rolled in the edge upsetting mill, and they are basically treated like generic metal rounds. When the planchet was punched, it would have had square rims - but all of this treatment blunts the edges. So, calling the rims &quot;rounded&quot; is also somewhat of a fallacy (they aren&#039;t intentionally rounded) - but they also aren&#039;t intentionally squared like the proofs. </p><p><br /></p><p><img src="https://upload.wikimedia.org/wikipedia/commons/7/75/PCBChamfer.PNG" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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