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I have an experiment set up where I need to compress some material using some G clamps.

I have a torque wrench which I can use to tighten up the gclamp to a known torque but am having trouble converting this to the linear force that will actually be applied to the material.

I've been looking at some mechanics of screws + bolts but have yet to locate a formula to tell me how much torque I need to apply to get a given force output.

Any help would be greatly appreciated.

The last formula I found is this:

T = (C x D x P x A) / (no of screws)

T = torque per screw (Nm)

C = torque coefficient; generalized values for copper/mild steel (0.36 dry, 0.18 lubricated)

D = nominal screw size (m)

P = desired Pressure (force per unit area) (N/sq m)

A = surface area (sq mm)

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# Converting torque applied to a bolt into the linear force exerted by the bolt

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