Torsion Springs - High-quality Bending Stress Design, Custom Torque Specifications

We are engaged in offering excellent quality Torsion Springs to our valuable clients. Torsion springs exert a force (torque) in a circular arc, and the arms rotate about the central axis. The stress is in bending not in torsion. It is customary to specify torque with deflection or with the arms at a definite position. Formulas for torque are in pound-inches or inches-pounds. If ounce-inches are specified the value should be divided by 16 to use the formulas in the inch-pound system.

When a force is specified at a distance from a centerline, or the torque, the distance is called moment, which is equal to the force, multiplied by the distance. Force can be in pounds or ounces with the distance in inches or the force can be in meters with the distance in millimeters.

Formulas for torques are based on the tangent to the arc of rotation with a rod to support the spring. The stress in bending caused by the moment is identical in magnitude to the torque, provided that a rod is used.

Torsion springs, whose ends are rotated in angular deflection, offer resistance to externally applied torque. The wire itself is subjected to bending stresses rather than torsional stresses, as might be expected from the name. Springs of this type are usually close wound, reduced in coil diameter, and increase in body length as they are deflected. The designer must consider the effects of friction and arm deflection on the torque.