Finding the Perfect Extension Springs Provider to Meet All Your Needs

Extension springs can be found everywhere from trampolines and screen/storm doors, garage door assembly, pliers and many other applications. These cylindrical helix springs absorb and store energy while creating resistance against pulling forces.

Hooks or eyes at both ends attach them to other components; these hooks may be machine, crossover or loop styles and can be modified for specific uses. With so many options, it is important to find a reliable, experienced extension springs provider who can provide the perfect product for your application.


Extension springs are tightly wound coils designed to store energy and absorb any force applied to them. Although more durable than compression springs, their quality depends on various factors including free length, wire diameter, initial tension etc.

Measuring an extension spring’s dimensions is vital in selecting an appropriate one for your application. Start by measuring its outer diameter; this can be done either by placing it over a piece of wood, or measuring between hooks on its end.

After knowing the spring’s rate and required travel or extension distance, the final step should be calculating its initial tension – this can be accomplished using the formula provided below.


Not only can size be an indicator of quality in an extension spring, but so too can its composition. Copper alloys, carbon steels and stainless steels are some of the more commonly used materials; each has unique properties to offer specific solutions to specific applications.

Selecting an appropriate material type requires taking into account how much force the spring will generate when extended and what environmental conditions it must withstand. A selection that does not meet these standards could result in unnecessary costs or spring failure, as well as its spring rate which measures how much load must be applied to reach a particular working length; typically measured by extending it one length and then to its second. Also referred to as spring constant, its calculation can be found using this formula:

End Conditions

Extension springs are not just limited to garage doors and trampolines – they are an indispensable component in laundry machines, car doors, vice grips, vices, vicegrips and various devices, tools and equipment used in laundry machines, car doors, vice grips as well as vicegrips used by vice grips as vices grips are used on vices grips among other uses. You’ll even find them used on airplane landing gears, stretchers and medical devices as well as various commercial/residential uses.

Stock extension springs typically feature hook ends – either crossover, machine style, or side style depending on application requirements – that are easy to attach and provide more strength than loops that require extra effort for installation. Closed and ground ends may also be an option but at greater expense and with additional rods required in each end for insertion purposes. Adding double closed coils at either end provides increased stability and slenderness ratio control if solid height must remain low.


Custom extension springs can be custom manufactured to any length and feature different hook or loop end configurations, including threaded inserts, extended twist loops, crossover center loops and hooks that can vary in size and distance from the coil body.

Adjustments to coil spacing can help achieve the desired load and spring rate in applications, with initial tension (the amount of spring coiled at rest) also adjustable to customize load capacity of devices or ensure their spring is properly located for proper functionality. These custom modifications provide flexibility that enables users to achieve their desired load capacity or spring position for optimal functionality.

Chest expanders use extension springs to resist pulling forces and can be modified according to customer specifications. Other common applications for spring-powered devices include garage door assemblies, vise-grip pliers, trampolines and washing devices; many other products that utilize springs have tension springs too!


Scroll to top