Accurate and effective spring design can only be accomplished in today's world using computer programs capable of running hundreds of simultaneous calculations. Following are just a few of the most basic formulas for getting a head start on compression spring design. Call us for design assistance. We can run a thorough analysis and assist you in designing the best spring for your application or download our ebook to get started.
Calculate a spring constant from the spring's geometry and shear modulus.
Calculate pitch, rise angle and solid height.
Calculate the maximum force a spring can take and the shear stress with consideration to the Wahl correction factor.
| Spring wire diameter | d |
| Spring outside diameter | Douter |
| Mean diameter of spring | D |
| Young's modulus of material | E |
| Max force at solid | Fmax |
| Shear modulus of material | G |
| Free length | Lfree |
| Wire length | Lwire |
| Solid height | Lsolid |
| Maximum displacement | Ldef |
| Maximum load possible | Lmax |
| Wahl correction factor | W |
| Spring Constant | k |
| Active coils | na |
| Total coils | nt |
| Density of material | p |
| Poisson ratio of material | v |
| Rise angle of spring coils | θ |
| Maximum shear stress | τmax |