Torsion springs

Torsion springs are close coiled helical springs designed to resist torque or rotation forces from two directions. Torsion Springs are created for the purpose of storing and releasing angular energy or for the purpose of statically holding a mechanism in place by deflecting the legs about the body centerline axis. Torsion springs are generally mounted around a shaft or arbor, and must be supported at three or more points.

The wind of the torsion springs can be right hand, left hand, or double torsion. Double torsion springs are a type of torque spring that has two coils separated by a space to minimize friction. These types of springs consist of a right-hand and a left-hand coil section connected together and working in parallel. It’s important that the torsion spring should always be loaded in a direction that causes its body diameter to decrease. It’s because, the residual forming stresses are favorable in this direction.

There are many options for leg configurations so the springs can be attached in different ways. Leg specifications to consider for torsion springs include leg angle, equal leg length and leg end style.

Regarding leg angle exist diferent types of torsion spring, such as axial, tangential and radial, or a mix of them.

It is also possible to classify, in relation with the form of this legs, some examples could be straight legs, straight offset legs, short hook ends, hinge ends and special ends, like looped ends.