Crest-To-Crest Spirawave

• Low-Medium Force
• Low-Medium Spring Rate
• Long Deflection
• Precise Load/Deflection Characteristics

Crest-to-Crest Spirawave flat wire compression springs are pre-stacked in series, decreasing the spring rate by a factor relative to the number of turns.

Equations

Note:
N must be in ½ wave increments.
Z = Number of active turns.

Nomenclature

b = Radial Width of Material, in [(O.D. - I.D.)÷2]
Dm = Mean Diameter (in) [(O.D. + I.D.)÷2]
E = Modulus of Elasticity (psi)
f = Deflection (in)
H = Free height (in)
I.D. = Inside Diameter (in)
K = Multiple Wave Factor
L = Length, Overall Linear (in)
N = Number of Waves (per turn)
O.D. = Outside Diameter (in)
P = Load (lbs)
S = Operating Stress (psi)
t = Thickness of Material (in)
W.H. = Work Height (in) [H-f]
Z = Number of Turns