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Torsion Spring Arc Length Formula and Calculator

Manufacturing Processes and Design
Spring Design and Engineering

Torsion Spring Arc Length Formula and Calculator

Arc Length of torsion spring formula;

l_a = ( π · r · α ) / 180°

or

l_a = ( π · d · α ) / 360°

Where:

l_a = arc length,
r = radius,
D = diameter
α = angle at center

References:

Mechanical and Metal Trades Handbook, 2nd Edition
2010
Ulrich Fischer, Roland Gomeringer, Max Heinzler, Roland Kilgus, Friedrich Naher, Stefan Oesterle, Heinz Paetzold, Andreas Stephan

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