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Message:: [QUOTE="GDJMSP, post: 3932631, member: 112"]mlov - To the best of my knowledge every mint in the world uses hubs to make their dies, and has done so for over a century. There may be a few exceptions but I have't heard of any. My point here would be that the letter engraving machine you are talking about is used to make the hubs - not the dies themselves. And there are master hubs as well as working hubs - master hubs are used to make the working hubs. All of that is somewhat immaterial, merely a technicality, in regard to the intent of your question of - what is an engraving machine. In simple terms it's a programmable cutting machine that uses cutting blades to cut the letters, and the coin's design, into the metal itself. That's really all there is to it. In reality they are very common machine shop tools. You can go to any machine shop and see tools that do the same basic things that the machines the mints use - they cut metal. That's all there is to it.[/QUOTE]