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Extension Spring End Types: What are the Options?

Views:337 Author:Site Editor Publish Time:2022-06-09 10:31:44 Orgin:Site

Extension springs are a type of spring used to store energy and release it when needed. They comprise coils of metal that are tightly wound together and have hooks or loops on each end. The hooks or loops can be attached to different objects, and when the spring is stretched or compressed, the energy gets stored in the coils.

Understanding extension springs and their applications


When it comes to springs, there are various types and applications that businesses can take advantage of. Extension springs come in many shapes and sizes, so it's essential to understand the different options before making a purchase. Here are three extension spring types you should be aware of:

1) Coil Springs: Coil springs find use where high tension is required, like in industrial equipment or medical devices. DIY enthusiasts are also famous because they're relatively easy to install and maintain.

2) Flexible Spring: These are often used in consumer electronics because they offer a range of flexibility ideal for touch screens and other delicate mechanisms.

3) Torsion springs are designed for heavy-duty applications like trucks or construction vehicles. They're usually more expensive than other types of springs, but their durability makes them worth the investment.



Extension spring end types


Hooks and loops are the two options when choosing extension spring end types.




The most common type is the screw hook, which uses a threaded post to attach the spring to the hook. This type of hook is easy to install and requires no special tools. Another popular option is the eyehook, which uses a small hole in the post to allow it to fit over a bolt or screw. Eyehooks are more secure than screw hooks and easier to remove if necessary.

Another type of hook is the toggle hook, which has two posts that rotate relative to each other. Toggle hooks are perfect for applications where space is limited or it isn't easy to reach behind or below an object. When installed, this type of hook allows you to extend and retract the spring without having to remove the entire hook assembly.

Finally, there are specialty hooks designed for specific applications. For example, some hooks have been designed explicitly with power cords and cables. And others are designed for mounting light fixtures above ceilings or walls. Whatever your needs, there's likely a specialized hook available that will meet them perfectly!




Loops are the most common type of end for extension springs. They're easy to install and remove, and they're very versatile. You can attach them to almost anything, making them a good choice for a wide range of applications. However, they're not as strong as other options, so they may not be suitable for heavy-duty applications.

There are several types of loops used in an extension spring system:

· Hollow loops: These loops comprise a thin metal sheet bent around a central post. They're often used to create tension in the extension spring, and they're also sometimes called "sleeve" or "bungee" loops.

· Wire loop: A wire loop is similar to an open loop but uses wires instead of metal sheets. This loop helps to create tension in the extension spring, and it's also sometimes called a "clamp" or "jaw" loop.


Extension spring end styles 


Extension springs are available with several different styles of ends, including:


Double-loop ends


The double loop end is the most common type of extension spring, and it's typically used on doors that need to be opened and closed quickly. It has two loops that form a "V" shape when assembled, which helps it resist fatigue and ensure consistent force throughout the life of the spring. Double-loop ends are also commonly used on sliding glass doors because they offer superior resistance against wind pressure and snow buildup.

Other extension springs include single loop ends (used on sliding glass windows) and tri-loop ends (used on garage door openers). Single loop ends have just one loop, while tri-loop ends have three loops that help distribute stress more evenly across the spring. Tri-loop ends are also more resistant to wear than double-loop ends, which is why they're typically the best choice for heavier applications like garage doors.


Machine style 


Machine-style extension springs have their ends formed for attaching to another piece of machinery. Some machine-style extension springs have their ends formed in the shape of a rectangular block with teeth on one side.

The other end may be left plain or have a similar configuration. These springs serve well in various applications, such as automotive suspension systems, garage door openers, and industrial machinery.


Crossover style 


Crossover style extension springs are a popular type of spring because they offer good performance and reliability. They're also easy to install, making them an excellent choice for businesses needing to deploy an extension solution quickly.

The crossover-style extension spring has two parts: the upper part (the coil) and the lower part (the sleeve). The coil is attached to the sleeve by a metal wire, which allows the spring to extend and contract. When you apply pressure to the coil, it pushes against the sleeve, which in turn causes the metal wire to move. This movement creates tension in the wire, which results in resistance against extension or contraction.

There are three main applications for crossover-style extension springs: door closers, drawer slides, and cabinet hinges. In each case, they provide superior performance to traditional springs thanks to their ability to resist wear and tear and deliver consistent tension throughout their lifespan.


Side style

The side-style extension spring is one of the most common and can be used in various settings.

These springs are made with two coils connected at the center, with hooks or loops on either end. When the spring is extended, the coils separate, and the hooks or loops keep the coils from unraveling.

The side-style spring has several advantages over other types of extension springs. First, it's easy to install because all you need is a wrench and some screws. Second, it has a short recoil time, so you don't need to wait for the spring to return to its original position before you can act again. Third, it's relatively lightweight, so it doesn't cause much noise when used. Finally, side-style springs are also known for their durability because they resist corrosion and wear and tear.




Extension springs are essential for many applications, and choosing the right type for your needs is essential. By understanding the different end style options available, you can select a spring that will meet your specific requirements.