How Does a Torque Wrench Work?

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Torque wrench working principle: It is designed based on the bending principle of beams, the torsion principle of torsion bars, and the compression principle of helical springs, capable of measuring the torque applied to a nut. A torque wrench, also known as a moment wrench, torsion wrench, or adjustable torque wrench, is a type of wrench generally categorized into three types: manual torque wrenches, pneumatic torque wrenches, and electric torque wrenches. The torque wrench features a long elastic rod with a handle at one end and a square or hexagonal head at the other. A replaceable socket is fitted over the square or hexagonal head and secured with a steel ball. A long pointer is also mounted at the top. The scale plate is fixed on the handle base, with each division representing 1N.