Bolt Torque
Torque, also called moment of force, is a rotational moment. It is a measure of how much twisting is applied to tighten (turn) the nut on a bolt. When bolting flanges together or anything else tor that matter, tightening the nut stretches the bolt adding pressure to the gasket. The bolt are designed to stretch a bit acting like a spring. Different factors can affect the torque like number of threads, oil, rust, type of material, etc.
Bolt Torque formula |
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\(\large{ T = \frac {k\;d\;p} {12} }\) | ||
Symbol | English | Metric |
\(\large{ T }\) = torque | \(\large{lbf-ft}\) | \(\large{N-m}\) |
\(\large{ p }\) = desired clamp load tension | \(\large{lbf}\) | \(\large{N}\) |
\(\large{ d }\) = nominal diameter | \(\large{in}\) | \(\large{mm}\) |
\(\large{ k }\) = torque coefficient | \(\large{dimensionless}\) |
Tags: Torque Equations