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Torsion springs can be made from round or square wire, although round is considerably cheaper and easier to manufacture. We keep a vast selection of material sizes and types in stock, from standard spring steels to nickel alloys, all of which can be used to manufacture torsion springs.
Torsion springs offers resistance to twist or rotationally applied force. When forces are applied to torsion springs, inside diameters decrease and body lengths increase. Designers should take this into account when design space is limited.

A torsion spring offers resistance to twist or rotationally applied force. When force is applied to a torsion spring the inside diameter decreases and the body length increases. Designers should take this into account when design space is limited.

A common example of a torsion spring is the spring in a clothespin. Torsion Springs are usually close wound. They reduce in coil diameter, and increase in body length when they are deflected. They offer resistance to externally applied torque. Common end styles are: Straight legs, Bend Offset, and Hinge

  The performance of a torsion spring depends on the following factors:
Wire size

Diameter
Number of coils

Length
Rate
Leg Type
Index
Stress