A must watch.

Reminds me of a 2" impact wrench I serviced for Lone Star Steel back in the 70's Handled sockets up to about 6". Weight about 500 lbs, had a live handle 6 feet long, and a dead handle also 6 feet long. I can't remember the torque spec, but we had no way to test it. LSS had a lifting ring on it so two guys could maneuver it in place and lower it over the head of the fastener and get after it. I wouldn't want to run it!

I wonder how long it took to cut the thread on the shaft.
 
I had a friend who used to make bronze nuts for submarines on his 10" South Bend lathe. The nuts were larger in diameter than that one,but finer threads. I can't recall the TPI count,but the South Bend heavy 10 handled it. He was a very experienced old timer who had learned to make things with minimal resources. He got the blank hex nuts cast somewhere. This was in the 70's.
 
This was one of 6 used to hold the rudder to the rudder palm of a coastal trader. I had to fit this underwater.
bolt.jpg

They cut a ring spanner out of some 2" plate and got us to swing hard.

(I didnt make it 'though)

Cheers Phil

bolt.jpg
 
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