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Looking for technical specs, dimension guides, or a glossary of terms? Familiarize yourself with common spring and wire terminology today.
We at Master Spring are dedicated to the custom spring and wire form industry. We’ve been making industry-leading custom wire forms and springs since 1945. Our experts are excited to solve any puzzles our clients send our way.
We know that not everyone lives in the world of industrial spring manufacturing—or has our passion for it. If you are wondering what technical spring jargon means, look no further. Below is a handy glossary of terms and definitions.
Active coils (na)
Angular relationship of ends
Closed and ground ends
Coils per inch
Free length (L)
Initial tension (Pi)
Mean coil diameter (D)
Modulus in shear or torsion (G)
Modulus in tension or bending (E)
Open ends, not ground
Open ends ground
Solid height (H)
Squared and ground ends
Squareness of ends
Squareness under load
Total number of coils (Nt)
Glossary reprinted with permission from the Spring Manufacturers Institute (SMI) Handbook of Spring Design.
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