ENGINEERING TOOLS
Spring Calculators
Online design calculations for compression, extension, torsion, disc and leaf springs
Compression Spring Calculator
Inputs
Results
Parameters look reasonable; working stress is within the allowable value.
Load–deflection
Sketch
D 30 × d 4 × n₁ 10 · H₀ 70
Common formulas of GB/T 23935: k = Gd⁴/(8D³n), τ = K·8FD/(πd³). Allowable shear stress = 0.5·Rm for the selected load class. Rm depends on wire size — adjust as needed. For reference only; contact our engineers for detailed design.
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View related products →Formulas
Spring index
C = D / d
Typically 4–16
Wahl factor
K = (4C−1)/(4C−4) + 0.615/C
Corrects for coil curvature stress
Spring rate
k = G·d⁴ / (8·D³·n)
n = active coils; within 0.5% of an energy solution incl. helix angle
Load & stress
F = k·(H₀ − H), τ = K·8FD/(πd³)
Compare with the allowable shear stress
Solid height
Hs ≈ (n₁ − 0.5)·d
Closed & ground; ≈ (n₁ + 1)·d if not ground
Buckling
b = H₀ / D
Both ends fixed ≤ 5.3; fixed–pivoted ≤ 3.7; both pivoted ≤ 2.6
We build to drawing or sample. Send us your drawing or working conditions and our engineers will recommend material and design.
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