Torque - Force relationship in C-clamp.
Torque - Force relationship in C-clamp.
(OP)
I know bolt calculation is only as correct as the guesses towards the K-factor,
however just for an indication:
What would be the pressure generated by a certain torque on the handle of a C-clamp?
Is this formula valid?
T = K F d
with d = nominal diameter of the threaded section
or is this one correct?
T = K F p
with p the pitch distance
as mentioned here ( a random google search)
I hope you will understand the question without the need for a drawing or a sketch, just imagine you're trying to squeeze a bathroom scale with a regular C-clamp...
however just for an indication:
What would be the pressure generated by a certain torque on the handle of a C-clamp?
Is this formula valid?
T = K F d
with d = nominal diameter of the threaded section
or is this one correct?
T = K F p
with p the pitch distance
as mentioned here ( a random google search)
I hope you will understand the question without the need for a drawing or a sketch, just imagine you're trying to squeeze a bathroom scale with a regular C-clamp...





RE: Torque - Force relationship in C-clamp.
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Mike Halloran
Pembroke Pines, FL, USA
RE: Torque - Force relationship in C-clamp.
You look at the C-Clamp as a curved beam, which would have a deflection once the screw is torqued to a predescribed level.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Torque - Force relationship in C-clamp.
Then this "total available force" is going to be divided into the clamping force, the bending force (of the C-clamp beam), friction losses in the screw thread as friction resistance increases.
So when does the C-clamp handle begin bending? 8<)
RE: Torque - Force relationship in C-clamp.
I can live with a 25% error (it's for woodworking and glue - home hobby project), and I am not going to use excessive torque so I assume the bending or any other deformation to be very small or negligible.
In the meanwhile, I've confirmed the first formula to be correct, I just wasn't sure any more hence my original question.
RE: Torque - Force relationship in C-clamp.
RE: Torque - Force relationship in C-clamp.
Dan T