Re: make - forge? - wedge for feathers-and-wedge rock-split

"Joe Gwinn"  wrote in message news:rd5h0jhkgaok22e5ptujf4es6qtlo2dog1@4ax.com...
Probably in Roman times, they were made of wrought iron.
Joe Gwinn
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Or bronze, the Romans were masters of it.
https://www.valvemagazine.com/articles/ancient-roman-valves
Like copper today none was left lying around.
https://www.atouchofrome.com/pantheon-explained-page-2.html#melting-of-the-pantheon-bronze-roof-trusses
The little remaining evidence of ancient tools suggests that they didn't change much from antiquity until the Industrial Revolution, look in an antique shop for examples. One difference is that screws were very rare until clock makers needed them.
Holtzapffel Book II, Chapter XXVI describes the history of laying out and forming threads by simple methods before the modern screw-cutting lathe was introduced. I have an old die stock with grooves for gradually pressing threads into a rod by tightening the two halves together that appear to have been cut with a chisel.
A great advance was a lathe with a sliding spindle with several thread pitches cut on it, so it would advance the work past a stationary cutter at the pitch selected by lowering a follower into one of the spindle threads.