Engineering lab · Interactive tool
Compression Spring Calculator.
Estimate rate, force, corrected shear stress, solid height, and coil-bind margin for a round-wire helical compression spring.
Round-wire compression spring / static screening
Live calculationk = Gd⁴ / 8D³NₐSpring results updated. Spring rate 6.05 newtons per millimeter. Force 72.6 newtons. Coil-bind margin 23 millimeters.
- d: wire diameter
- D: mean coil diameter
- Nₐ: active coils
- G: shear modulus
- δ: deflection
- 2 mm wire reference: 4.8401 N/mm and 20 mm margin
- Invalid coil geometry: input is rejected
Added visible variables, two verification examples, and an experience connection. Calculation method is unchanged.
Related engineering capabilityA viable rate still needs a viable spring
The model applies the classical helical-spring rate and Wahl curvature correction. It helps expose geometry, load, stress, and travel tradeoffs early.
Production design must also resolve fatigue, end conditions, free-length variation, set, buckling, surge, relaxation, corrosion, temperature, and supplier process capability.
Before specifying the spring
- Define force targets at every operating position
- Preserve practical clearance before solid height
- Check spring index and manufacturability
- Evaluate fatigue at mean and alternating stress
- Control buckling, guidance, ends, set, and relaxation
Direct conversation
Review the product, the available evidence, and the decision blocking progress.
Send a concise, non-confidential brief. You will work directly with Jared from the first review through final handoff.
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