Torsion Spring Length
Torsion Spring Design Resources – Spring Design
Most torsion springs are close-wound, with body length equal to the wire diameter multiplied by the number of turns plus one. When a spring is deflected in the direction that will reduce the coil diameter, body length increases according to:
L = d(Nb + 1 + Ɵ )
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Torsion Length Spring Diagram
For applications that require minimum hysteresis, spring should be designed with space between adjacent coils to reduce frictional losses.