﻿GET_GEVOMechL2_01_01_01_17 - ANIMATION Screen
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The most prevalent controlled method of tightening threaded fasteners is tightening to a specified torque value.

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In this method, generally known as torque control, rotary force is applied to the nut as it moves down the threads of the bolt.

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Once the nut contacts a surface, it begins to act like a screw jack, forcing the bolt to stretch.

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The problem is determining exactly how much clamping force that the applied torque generates.

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A torque wrench can indicate how much force is being applied to the nut, but not how much stretching or clamping power is really being generated.

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This is because some of the torque we are measuring is being absorbed by friction between the nut and the threads or mating surface, or by twisting in the bolt.
