Spring Terminology
Active Coils - Those coils which are free to deflect under load.
Ground ends-Ends of springs are ground to provide a flat plane.
Closed ends - Ends of springs where the pitch of the end coils is red uced so that the end coils touch.
Free length - The overall length of a spring in the unloaded position.
Ground ends - Ends of springs are ground to provide a flat plane.
Hole - This is the minimum diameter of the hole in which spring can work.
Load - The force applied to a spring that causes a deflection.
Loops - Coil-like wire shapes at the ends of extension springs that provide for attachment and force application.
Mean coil diameter - Outside wire diameter minus one wire diameter.
Pitch - The distance from center to center of the wire in adjacent active coils.
Total number of coils - Number of active coils plus the coils forming the ends.
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