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Spring Helix Wire Length Formula and Calculator
Manufacturing Processes and Design
Spring Design and Engineering
Spring Helix Wire Length Formula and Calculator
Length of spring coil helix formula;
l = π · Dm · i + 2 · π · Dm
or
l = π · Dm · ( i + 2 )
Where:
l = effective length of the helix,
i = Number of active coils,
Dm = mean coil diameter
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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