Torque application is a widely accepted method of gauging or estimating clamping force.
Many different factors impact torque wrench output. Wrench design, user technique, and fastener condition are just a few of the most obvious variables that impact clamping force.
There are fastening strategies that cover torque alone. There are strategies that include angle measurement. Angle measurement is the degrees of fastener rotation. If you consider thread count, thread pitch, fastener materials, lubrication, you can accurately estimate how far that fastener is going to be stretched. You'll want to keep the stretching to the limits of the elastic zone for that material. If you stay in the elastic zone, the material wants to return to the original shape. That is what creates clamping force.
If you stretch the fastener into the elastic zone for that material, it won't return to the original shape and any realistic estimate of clamping force is lost.
We've given our torque seminar hundreds of times and the commentaries are always the same. People walk away with both a fresh understanding of torque principles and a clear understanding of the reasons behind those principles.
Even seasoned torque professionals often comment about gaining a fresh perspective on torque.
To learn more about how our torque seminar can benefit your assembly teams and their throughput, contact your local Sturtevant Richmont sales professional.