1. Torque measurement

Torque transducers are used when the force system can be reduced to a single component of the moment vector by choosing a particular axis system.

This is what we find on many machine parts: screws, transmission shafts, motor output shafts, shaft lines, torsion bars, etc., which we commonly call "torque" in reference to the moment F d produced by two opposing forces F whose lines of action are d apart. On such parts, taking a system of axes in which one of them coincides with the longitudinal axis of symmetry, the components characterizing the force system are reduced to the moment component carried by this axis.