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Need a custom torsion spring, or the numbers on a stock spring? Here's a great tool.


How to use this tool (tips)
d = Wire Diameter (or side of square)(in) TYPE of WIRE
ID = Inside Diameter (free)(in) Round
N = Number of Active Coils (-) Square
Fw = Working Deflection (radial degrees)
i = Increment (radial degrees)
E = Modulus of Elasticity in tension (Mpsi) (millions of psi) Name: 
(optional descriptive text for this iteration)

E values for some Common spring materials (Mpsi):
Music Wire (millions of psi)
Up to .032" 29.50
.033 to .063" 29.00
.064 to .125" 28.50
.126 to .250" 28.00
Stainless Steel  
302, 304, 316 28.0
17-7 PH 29.5
420 29.0
431 29.5
Elgiloy* 29.5
* Trade name of Hamilton Watch Company

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