On Fri, 1 Feb 2019 06:11:16 +0000 (UTC), Cydrome Leader
It's some sort of press with a heavy wheel that spins back and forth and
presses on the work using a heavy screw.
No audio needed, just watch about 10 seconds
What's the history of these, any is it something uncommon in the US?
I'd call it a "rotary inertia" or "worm gear inertia" press and it
is not common in North America from what I've seen.