torsion springs offer resistance to externally applied loads through angular deflection of the spring ends. The resulting torque applied to these springs sets-up bending stresses, one of the key design criteria for developing a torsion spring design. Although typical torsion springs are close wound, special types include spaces between the coils to reduce friction. Another special type of torsion spring is the double torsion, which consists of one right-hand and one left-hand coiled section connected to work in parallel.

torsion springs offer resistance to externally applied loads through angular deflection of the spring ends. The resulting torque applied to these springs sets-up bending stresses, one of the key design criteria for developing a torsion spring design. Although typical torsion springs are close wound, special types include spaces between the coils to reduce friction. Another special type of torsion spring is the double torsion, which consists of one right-hand and one left-hand coiled section connected to work in parallel.