How Torsion Springs Work

Torsion Springs work by applying torque or storing rotational energy. Because torsion springs have an extended “arm” on either end of the coiled spring, the arm connects to another component within a mechanism requiring rotational force. NOTE: End configurations of torsion springs are very important.

Loads placed on the arms create torque around the spring’s centerline, thereby exerting a force in a circular arc. As the arms rotate about the central axis, their resistance to the twisting action generates a force that produces rotation.

Torsion Springs are best supported by some form of rod going through the coils. Pressure applied against the arms of the torsion spring should load “inward” in the direction of the coiled wind.

The Spring Making Machine above is fully-automated to produce torsion springs and can be adjusted for End Length, Diameter and Number of Turns.

Torsion Spring Applications

Torsion springs are used in many industrial applications (ratchet mechanisms, counterbalance mechanisms, machinery components, and motor pump assemblies) and across many types of industries. The engineering function of Torsion Springs is to rotate attached components or to cushion the twisting motion between components.

Different Types of Custom Torsion Springs manufactured by Spiros Industries




The single-bodied torsion spring (left) and double-bodied torsion spring (right) are custom manufactured to exact specifications. Spring design engineers use great care in designing double torsion springs that will be coiled out from the center (as seen above) versus coiled inward from the ends.

Types of Torsion Springs

  • Single Torsion Spring
  • Double Torsion Spring

Single Torsion Springs are a singular helical coiled spring, which can have a wide variety of end styles and arm lengths.

Double Torsion Springs are derived from combining a left-hand single torsion spring with a right-hand single torsion spring; which have a length of wire between them to minimize friction.