What is the spring rate or spring constant of a Compression Spring?
- If the spring rate c [N/mm] is multiplied by the travel s [mm], the spring force F [N] is obtained
F=c•s - “Spring rate” and “spring constant” are synonymous terms
- As a rule, springs have a linear displacement-force ratio
- There are exceptions for certain forms of springs such as conical springs, compression springs with different pitches, disc springs, e.g. slotted disc springs with a degressive/progressive displacement-force curve
Exception
- Constant force springs have almost the same force over the travel
- In the case of extension springs, the linear force-deflection curve can begin at a higher level due to the pretensioning produced during winding