Compression / tension spring (B)
Deflection, stiffness and shear stress of a helical compression/tension spring, using an alternative coefficient set to compression-tension-spring-a.
Spring outer diameter, D_out = D + d14 10⁻³ m
Spring radius, r = D/26 10⁻³ m
Spring length closed, L_c = nd60 10⁻³ m
Spring deflection, f22.93 10⁻³ m
Spring stiffness, k = dF/df = F/f4.36 10³ N/m
Free spring length, L0 > L_c + f82.93 10⁻³ m
Pitch of lead, s = L0/n2.76 10⁻³ m
Shear stress, τ360 10⁶ Pa
Method & references
- Helical compression/tension spring — alternative deflection/stress coefficient set.
The computation is a literal port of the original client-side JavaScript from /calculators/t14_2.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.