How To Understand and Use Torsion Springs

Springs are power-driven mechanical components that store mechanical energy through physical changes when external forces are applied to them. Springs are obtainable in many types. Torsion springs are intended to offer resistance to outwardly applied torque.


Torque is a force that is likely to produce revolution. A torsion spring exerts torque in a rounded arc, and its arms are turned about its central axis. The torsion spring’s ends are turned in an angular bounce. A torsion spring is not subjected to torsion stress but to a bending stress. This means that it performs best when sustained by a rod or tube that is synchronized with the center of the final product.

Common torsion ends are straight, hinged, hook, and straight balance. Limited tooling is required when producing these torsion ends. A double torsion spring is unique. The two sets of coils are linked and worked hand in hand with the force of a combined torque. The formula for torque is written in inch pounds. When the force comes from the center and is specified at a distance, the torque is called the moment.

Application and Uses of Torsion Springs

To manufacture torsion springs, alloys of steel are used. There are few other substances used to make springs. Examples are titanium, bronze, and copper, among others.

Torsion springs are used in automobile assemblies, garage doors, machinery, tools, and appliances. They come in a selection of strengths and sizes and help raise and lower garage doors. Because of the constant tension of the bottom hinge and the springs, tampering could cause grave injury. Any work related to the torsion spring may be left to a professional. Several uses of torsion springs are:

  • Torsion bars are used to hold automobile suspension parts, which support the wheels.
  • A torsion pendulum is driven by a torsion spring wire.
  • A torsion catapult, a siege engine, uses a torsion spring to hurl a heavy missile with great force.
  • The balance spring of a mechanical watch drives the balance wheel to its center, similar to a torsion pendulum.
  • Determining the electrical current through an automatic pointer-type meter is a kind of torsion balance.
  • Tiny torsion springs are used in the digital micro-mirror device of a video projector.
  • Other uses of torsion springs are used in counter-balancing the heaviness of garage doors, opening trunk covers of some sedans, opening pop-up doors of compact discs and digital cameras, and in construction of a mousetrap.

Torsion springs are popularly used but not popularly known. Most people do not know what they are, although we've been using them everywhere. Even with the traditional mouse trap, it will not be able to catch a mouse without the help of the torsion spring. We would not enjoy the beauty of time without the torsion springs in our watches or in our pendulum clocks. There are many other uses of these torsion springs that could not be realized without them.


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