Torsion Springs

Single Torsion

Torsion springs are helical springs that make use of their torque or rotational force. Torsion springs typically have ends or legs that, when rotated or twisted about their center, store energy and offer resistance to an external, applied force. The allowable torsion for each spring is dependent on the allowable bending and torsional stresses of the wire. Torsion springs are usually closely-wound and will reduce in coil diameter as well as increase in body length during rotation or angular deflection.

Torsion springs or torsional springs are used in many different devices and are typically found in major household appliances, medical devices, military/aerospace devices, and more.

Tips for Designing a Torsion Spring:

One of the key steps in the design phase is determining how to counteract the effects of friction. This may be done by including a pitch, which is the amount of space between each coil, in the spring’s design while also making sure that the inside diameter is able to provide clearance when the spring achieves maximum deflection. The end configurations or legs can be manipulated into any shape and size, but overall cost should be kept in mind. The legs can be as simple as straight legs, hooks, or angular bends, and their shape may help with preserving the part. More complex geometries include full or multiple loops or a number of offsets in order to fit the assembly designs. All design considerations can be discussed with one of our design consultants.