How to Build a 100 Ton Press for $35
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http://digg.com/video/build-a-100-ton-press
Review: excellent use of bolt clamp force. Yes, 1" bolts do have 50k lb of clamp force each. They will not last long unless hardened under such force, though. Adding geardowns for screwing these down using small motors in unison would be a good idea, but 3 point action like this would be better.