Spring Term Glossary

Active Coils: the coils of the spring which store and release energy. The active springs in a compression spring will expand when a spring is compressed.

Deflection: the motion of a spring’s ends or arms after an external load is applied or removed. It is essentially the motion of the spring.

Free Length: the length of a compression spring at rest (when no load is applied to it).

Helix: the spiral form or shape of a spring. Applies to compression, extension and torsion springs.

Hooks: the open ends of an extension spring.

Initial Tension: the force that keeps the coils of an extension spring closed. A certain load must be applied to them to cause the coils to separate.

Load: the force applied to a spring that causes a deflection.

Loops: the shape of the wires at the ends of extension springs (where loads are attached).

Total Coils: the amount of coils that a spring has. The total number of coils (and active coils) determines how much stress the spring can take.

Wire Diameter: the size of the wire used in springs. The thicker the wire, the stronger the spring will be.

Rate: measured in lbs/in. It is the change in load per unit deflection.

Now that we both speak the same language, contact our team today to get your free spring order quote. Contact Acme Wire Products today to answer your questions and provide you with a custom quote today.


Acme Wire Products has designed, recommended and manufactured custom wire components for customers in many diverse markets.  We offer the benefit of our almost 50 years’ experience in the manufacture of component parts for hardware, medical & lab equipment, cable management, sporting goods, firearms, furniture, guarding, HVAC,  pharmaceutical, automotive, optical and food service and processing industries.

Acme Wire’s designers work with our customers to create a wire component that will provide the greatest functional value.  The design of wire products such as levers, handles, supports, rings, guards, baskets, trays, grids, frames, shelves are limited only by one’s imagination (and the limitations of technology).

Contact Acme Wire Products to assist you in determining the wire product best suited to your requirements!

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Acme Wire Products Co., Inc.  – Mystic, CT



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