My experience is largely with other types of light-industrial presses, particularly screw type (fly) presses, knuckle-joint, and percussion presses used for coining, embossing, or forming in metal. Typically the plates (or dies) are engraved in steel, which is then heat-treated to withstand the forces involved… which are on the order of 40 to 60 tons per square inch. (8,000 to 12,000 psi). It has been extremely difficult to learn how to construct tooling and holders for such presses, how to cut and hob dies, and how to feed and extract the work, as there is very little in print on the subject. But in 15 years of doing it I have learned a lot. If there is anybody on this forum seeking to expand from inking into forming, I might be able to help. Tom Maringer, Shire Post Mint, Springdale Arkansas.
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Looks like you are a good resource for individuals in this area and your website has some pretty cool coinage. I sent an email through your site requesting info on getting parts for this M.M. Kelton’s Son press.