Jib Crane Tie Rod
Jib Crane Tie Rod
(OP)
Hello,
I am designing a tie rod for a wall mounted jib crane. I have attached a Spanco drawing of a similar design.
My question is: do I need to make room for a wrench for the nut that sits between the tie rod clevis plates? Or is it just hand tightened during the adjustments during install?
I searched for videos or instruction manual for tie rods but what not able to find anything that showed how these actually get installed.
Thanks you,
A.M.
I am designing a tie rod for a wall mounted jib crane. I have attached a Spanco drawing of a similar design.
My question is: do I need to make room for a wrench for the nut that sits between the tie rod clevis plates? Or is it just hand tightened during the adjustments during install?
I searched for videos or instruction manual for tie rods but what not able to find anything that showed how these actually get installed.
Thanks you,
A.M.






RE: Jib Crane Tie Rod
RE: Jib Crane Tie Rod
RE: Jib Crane Tie Rod
Could be done in different ways, but I understand that is the typical way.
RE: Jib Crane Tie Rod
If you find that the nut is turning a bit inside the clevis, add a packer to the inside of the clevis to reduce the clearance. This'll also help wearing on the clevis.
another day in paradise, or is paradise one day closer ?
RE: Jib Crane Tie Rod
RE: Jib Crane Tie Rod
They were despised for loosening from vibration, even when equipped with jam nuts, and for then literally falling off along the road, or worse, bouncing up and snagging a spoke. The Johnson Rod is one major contributor to the disappearance of the British motorcycle industry.
The Japanese used them on their motorycles, too, but with elastic stop nuts or thread locking compound, and that made all the difference.
As for finger tight, no, nobody wants that; you need wrench clearance around every polygon that is not being held captive by its geometry, and you need some kind of Loctite on every thread, and probably jam nuts, too. Jam nuts by themselves will someday loosen from vibration or impact, and nobody except some lawyers will be happy when that causes the jib to fall.
Mike Halloran
Pembroke Pines, FL, USA