Spring Creator spring calculator  logo Custom Instant Spring Quote Stock Spring Finder Logo

 Made in U.S.A.  Español Ph 951-276-2777

Visible on Tablets and Smartphones

Initial Tension


The tension already gathered in between an extension spring’s coils to keep the coils together is called initial tension. Initial tension is released once the extension spring is extended to a point where you can see light in between the coils.


Extension spring rate is the constant force your spring exerts per inch of distance traveled. Initial tension will be added to this load in a non-concurring manner. This means that, unlike rate, initial tension will not increment, it will simply be added to the force of your spring rate once. Take a look at the examples shown below for a clearer explanation and the different ways you can calculate initial tension.

Acxess Spring, 2225 E. Cooley Dr. Colton, CA 92324

Ph: (951)276-2777 Fx: (951)240-3334 Email: sales@acxesspring.com