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<p>[QUOTE=&quot;Sunbird, post: 8311637, member: 116324&quot;]Hi all – I&#039;m suddenly fascinated by lathes, coining presses, and other machine tools. I feel like I completely missed out on a major technological domain. Have any of you produced your own medallions or coin replicas? How do you achieve the &quot;upsetting&quot; of the discs? Is this something where you need a <i>bona fide</i> upsetting mill/machine, or can you just leverage general shop tools?</p><p><br /></p><p>It seems like upsetting mills for coins <a href="https://medalblog.wordpress.com/2011/02/21/i%e2%80%99m-upset-upsetting-machines-get-no-respect/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://medalblog.wordpress.com/2011/02/21/i%e2%80%99m-upset-upsetting-machines-get-no-respect/" rel="nofollow">were a big deal</a> when they were introduced in the 1800s, but the basic operation seems basic enough that other machines should be able to manage it. When I search for upsetting machines, I get results <a href="https://www.machinio.com/cat/upset-forging-machines#results" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.machinio.com/cat/upset-forging-machines#results" rel="nofollow">like these</a> but I don&#039;t understand what I&#039;m looking at. They&#039;re not the coining kind, and they&#039;re huge. I want to make some 1-inch and 2-inch medals, and vary the depth of the field / the rise of the upset rim.</p><p><br /></p><p>Thanks.[/QUOTE]</p><p><br /></p>

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