Cheeseboro & Torque Wrench

Ech725

Active Member
Joined
May 28, 2011
Location
California
I had a student ask me about using a torque wrench on a cheeseboro. Awhile back, I was told to finger tighten and do a 1/4 turn on cheeseboros. I've seen torque specs on Rota-Lock s, but I was wondering if anyone has run across torque specs/recommendations on cheeseboros?
 

derekleffew

Resident Curmudgeon
Senior Team
Premium Member
Joined
Aug 21, 2007
Location
Las Vegas, NV, USA
Okay, I'll bite, since no one else has...

I've never seen a torque spec for a 'burger. Further, aluminum or steel? Aluminum almost always have wing-nuts and I've never seen a torque wrench that would work with a wing-nut. Okay, one could use a special wing-nut socket

with a regular torque wrench. But why?

Along the same idea, very rarely if ever have I seen someone use a torque wrench on truss bolts. There probably IS a specification, but no one knows or cares what it is. You learn to just "know" how tight is correct.

How tight should the screw-pin on an anchor shackle be? How about the nuts on a cable clip (Crosby)? Aha, gotcha! There IS a specification for those, and it should be tested before and re-torqued after the termination has taken weight.

Paraphrasing Art Linkletter (who?), "Students ask the darndest things."
 

DavidJones

Well-Known Member
Joined
Jun 7, 2017
Location
Touring
Interestingly, I had an argument with stagehands under-tightening truss bolts, they were going basically finger tight, and could not figure out that an a uneven stage deck, the sections of truss might not meet completely flush, and extra tightening was needed to suck up the gap between them. I emailed one of the major manufacturers, I think Tyler or XFS and the response was "snug by mechanical means i.e. a wrench" I was really hoping for an answer is foot/pounds, but apparently anywhere past "pretty tight" does not affect the performance of the truss in any way. Even with loose bolts, the aluminum would likely fail before grade 8 hardware.

On Cheeseburoughs, I have had some giant ox strength hands strip out the threads. I usually don't go past 1/2 turn after finger tight for an overhang pipe or light tree. On fixtures they are always finger tight. No tools, unless we are doing something silly like yolking a mover out 90 degrees.
 

RonHebbard

Well-Known Member
Premium Member
Joined
Jun 12, 2004
Location
Waterdown, ON, CA
Interestingly, I had an argument with stagehands under-tightening truss bolts, they were going basically finger tight, and could not figure out that an a uneven stage deck, the sections of truss might not meet completely flush, and extra tightening was needed to suck up the gap between them. I emailed one of the major manufacturers, I think Tyler or XFS and the response was "snug by mechanical means i.e. a wrench" I was really hoping for an answer is foot/pounds, but apparently anywhere past "pretty tight" does not affect the performance of the truss in any way. Even with loose bolts, the aluminum would likely fail before grade 8 hardware.

On Cheeseburoughs, I have had some giant ox strength hands strip out the threads. I usually don't go past 1/2 turn after finger tight for an overhang pipe or light tree. On fixtures they are always finger tight. No tools, unless we are doing something silly like yolking a mover out 90 degrees.
@DavidJones A real Foot / Pounds or Furlongs / Fortnight rating would get my vote; in my mind, over torquing over stresses the bolt / threads even before a load is applied.
Toodleoo!
Ron Hebbard
 

JChenault

Well-Known Member
Joined
Jan 5, 2009
Location
seattle, wa USA
@DavidJones A real Foot / Pounds or Furlongs / Fortnight rating would get my vote; in my mind, over torquing over stresses the bolt / threads even before a load is applied.
Toodleoo!
Ron Hebbard
Ron
I am excessively disappointed in you. Any conisour of obscure measurement systems would know that in the FFF system of measurement futlongs is distance fortnight is time, and firkin is mass. Therefore the proper equivalent to foot/pounds would be Furlongs / Firkin
 

TimMc

Well-Known Member
Joined
Feb 15, 2017
Ron
I am excessively disappointed in you. Any conisour of obscure measurement systems would know that in the FFF system of measurement futlongs is distance fortnight is time, and firkin is mass. Therefore the proper equivalent to foot/pounds would be Furlongs / Firkin
Ron has forgotten more that we mere mortals will ever know. :whistle:
 

JChenault

Well-Known Member
Joined
Jan 5, 2009
Location
seattle, wa USA
Firkin is volume isn't it, like kilderkin, barrel etc? So wouldn't you need the even more obscure furlong firkin ^-3 ?
My understanding is that a firkin is a mass unit. Ie the mass of an imaginary ( thereby no mass) firkin filled with water. ( just as a gram was once defined as 1/1000 of a liter of water)