Related Resources: calculators

Spring Helix Wire Length Formula and Calculator

Manufacturing Processes and Design
Spring Design and Engineering

Spring Helix Wire Length Formula and Calculator

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

Related: