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How Extension Springs Are Used in Engineering

Views:174 Author:Site Editor Publish Time:2022-09-30 11:58:29 Orgin:Site

Although springs have a deceptively simple appearance, they are an essential design component for various engineering applications. An extension spring is a way to go if you need to store energy or create a barrier to a force acting in one direction. Engineers in the medical, electrical, manufacturing, and farming industries will find this especially helpful for various reasons.

If you want to design a component that can reliably provide the desired outcome under specific conditions, evaluating the principal function of a tension spring is beneficial.

What are extension springs?


As their name implies, extension springs (tension springs) are springs that can be altered by stretching to expand their length. These springs get into tension as their length is increased. The ends of most extension springs feature a hook or an eye for easy attachment, and the spring exerts a pulling force when the parts are separated.

In contrast to compression springs, which need to be supported along their length, extension springs remain under tension the entire time. Most extension springs on the market are coiled springs made from steel wire.

How do extension springs work?


Coil springs used in extensions are firmly twisted, leaving no space between the coils. When you apply tension to an extension spring, the coils unwind, allowing the spring to stretch. A coil's ability to resist this force allows it to store mechanical energy. When the tension is removed, the spring returns to its original form with no space.


How are extension springs used in engineering?


Controlling Movement


One of the most obvious applications of springs is regulating lateral motion, like opening and closing a door. Tension springs are versatile enough to be employed either to initiate an opening or closing motion or to reduce the impact of such a motion when an external force induces it, which means the spring can be tailored to meet the system's overall requirement for force over a given distance with relative ease. 

Since the extension spring stores energy instead of deflecting it, the forces at play are always important to consider. This concept is also responsible for the spring's bouncing action. While this has its uses, maintaining tight control over the system's moving elements necessitates a means of counteracting it.

Circuit breakers and switches


Engineers can take advantage of the many properties of extension springs beyond their use in common applications. You can implement tension spring technology in circuit breakers and switches. Since springs can store energy, you can use them as vibration dampers.

Accordingly, just like locking pliers, you can employ extension springs to secure a mechanical component, which is functionally comparable to a diaphragm valve, which uses a network of tension springs to regulate an opening in proportion to the magnitude of the force applied to it, operates.

Using an extension spring for this purpose has the distinct advantage of not needing any external power, which can be scarce in times of crisis.

Farm Machinery


Heavy-duty extension springs are used in farm machinery because of the tremendous pulling force required. You can use extension springs on your farm to their full ability, whether tractors or combine harvesters. Moving big objects around your farm and plowing fields are all examples of hard labor on your farm that extension springs can help you with.

Although hook and loop extension springs are the most common in heavy machinery, other types exist. When problems arise with your farm equipment, like rusty springs, it's time to get a new set as soon as possible; therefore, you must visit a reliable company to find replacements.

Taking Accurate Measurements


The extension spring is also frequently employed by engineers in the measurement of system-wide force magnitudes. Using a tension spring, you can primarily do one of two things to measure these dynamic forces: To that end, the springs can be designed to generate a target quantity of pulling force according to a specified extension rate. You can then figure out how much force is being applied to the spring by how far it is stretched.

Take Away


Extension springs last for quite some time. Although they come in various materials, the most common ones are composed of hard metals like stainless steel. There is no need to worry about them breaking down on you at an inconvenient moment, as tension springs have a very long lifespan, even when subjected to a constant tension strain. It would help if you seek advice from a professional spring manufacturer before you decide which extension spring best fits your application.

Extension vs. Compression Springs: What's the Difference?
Extension vs. Compression Springs: What's the Difference?
time: 2022-07-29 11:38:25

Springs are one of the most commonly used parts in a moving or stationary machine. However, did you know there are different types of springs? Well, there are two main types of springs; extension and compression springs.

Both are made of different materials, including cold-drawn steel, copper, titanium, and stainless steel. These materials determine the cost and use of the springs.

We have prepared a detailed review of the difference between these two springs to help you make a sound decision while shopping or looking for a spring to integrate into your machine.

Let's delve in!


How are Extension and Compression Springs Used?


Also known as tension springs, the primary function of these springs is to either bring pieces together or compress them. The criterion of functionality integrated into these springs ensures optimal functionality of the compressed or extended parts.

Extension springs can be used in a wide range of industries, including oil, rail, gas, and agriculture. They are quite popular in the medical industry and are mostly used in surgical lights and stretchers. Compression springs are used in industries such as automobiles and electrical.

Application of Compression Springs 


One of the most commonly used applications of a compression spring is in a spring-operated ballpoint pen. When the head is squeezed to remove the nib, the internal spring compresses and stores energy.

When the head is squeezed again to bring in the nib, this energy is released when the spring returns to its original form.

Such springs are also commonly utilized in mechanically controlled cam-follower devices, certain valves, and other applications. The trampoline has several extension springs that give the appropriate rebounding force based on its size.

When someone jumps on it, the spring stretches and stores energy in it. They then immediately release the energy by shortening their length and resuming their previous form.

Application of Extension Springs


To fit specific functions, extension springs are designed with a variety of hook or loop end configurations. Extended twist loops, headed inserts, expanded eyes, hooks, crossover center loops, rectangular ends, teardrop-shaped ends, and reduced eyes are examples of extension spring ends.

Extension springs vary by extended length, body length, maximum load, and loop or hook length. These springs are found in a wide range of products, such as garage doors, tools, washing machines, and toys.

Because of their size range, extension springs are useful in many applications, including medical equipment and off-road gear. They are commonly used in the following applications:

· Vice-grip pliers

· Car exteriors and interiors

· Washing devices

· Toys

· Garage door assemblies

· Carburetors

· Farm machinery

Difference Between Extension and Compression Spring


Extension Springs


Also known as tension springs, they are used in products such as brakes, levers, catches, trampolines, and many other applications. They work by absorbing and storing energy, which is also used to resist pulling forces.

The springs are placed on both sides of a component, and whenever they separate, the spring attempts to bring them back together.

The initial tension is what defines how firmly the spring is designed. If you are working with a heavy load, it is recommended to go with a stronger and wider extension spring. 

Simply put, these springs are designed to give an equivalent force to operating components that entails stretching to operate. As a result, they are made of materials that are quite strong and durable.

Compression Spring


Technically, a compression spring is designed to shorten the length under the action or length of external force. As compared to extension springs, compression springs are designed to compress when subjected to a load.

Compression springs are made of coiled metal that is quite similar to an extension spring. If you closely look at the two springs, you'll realize that the extension spring has a broader and wider coil.

The compression extension springs are also made of a thin strip of a coiled piece of metal, while the extension spring is made of a wider strip of a coiled piece of metal. Their criterion of functionality is also different from that of extension springs. You will note that extension springs lengthen under stress while compression springs shorten.

How to choose the Correct Spring Ends


Spring End


The spring ends are a distinguishing feature of springs. The spring ends will determine the spring to choose for a certain application or task needed. Some spring ends are hooked or looped, whereas others are closed, straight, or open. 

Resistance to Magnetic Forces


Will your spring work in a magnetic field? If so, you might need to get a spring made of non-magnetic materials, especially if the parts around it are magnetic. It will help prevent vibration when placed in a piece of equipment or instrument.

Spring Application


A spring will, of course, have to execute a specified duty or function. As a result, various springs are utilized for different applications; thus, choosing the proper one is critical. If you require springs for a mattress, for example, compression springs are more likely to be chosen than other varieties.

Resistance to Extreme Temperatures


This is the defining feature of springs. Many industries, especially automotive and aerospace, rely on the ability to work in severe cold or heat.

If your springs must perform in a tough environment, the first step in the spring design is to select a sturdy material that will not weaken or break in low or high temperatures. Inconel carbon, for example, can operate ideally at temperatures as high as 870oC.

Get Your Ideal Springs Today!


Choosing the ideal spring for your project can prove to be a daunting task. However, that does not mean that you cannot get your desired option.

If you put the above factors into consideration the next time you are shopping for spring, there is no doubt that you will experience exceptional results.

Contact us for the latest springs in the market. Let us ensure you get the best springsand we will offer cutom springs for your desired project.

Common Uses For Extension Springs
Common Uses For Extension Springs
time: 2022-07-07 11:19:07

Even if you weren't sure of the specific name, you've all encountered extension springs previously. The ability to give resistance to a more significant force to modify tension is provided by these coiled wire springs, which have two sides to make it simple to link them to another component.

You can accommodate numerous applications for extension springs through customization. They are helpful small components with many applications if given the necessary design features.


Typical Applications for Extension Springs

You can design extension springs with various loops or hook ends for particular tasks. In addition to rectangular endpoints and teardrop-shaped endings, extension spring ends come with threaded inserts, crossover center loops, hooks, expanded eyes, and reduced eyes.

For customized extension spring functions and fits, alter the hook length and the separation between the spring body. You can use extension springs for various things in daily life, from the vehicles that transport you daily to the agricultural equipment that generates food.

There is always a requirement for an extension of some kind because extension springs have various sizes and forms with multiple hooks and eyes to latch onto both sides. The springs are broadly applied in the automobile sector, farm equipment, electronics, toys, and a wide variety of other products.



A lot of toys in the past used extension springs. You can use the springs in various toys, particularly those with a shooting or throwing component. However, the small springs and the objects they discharged were considered dangerous for children. Pinball machines and wind-up toys are two examples of incredibly secure and well-liked toys that use extension springs.

Washing Machines


When it comes to mechanical extension spring uses, a washing machine is perhaps among the last items you might think of, but they play a crucial role in the equipment. Your washing machine's drum starts spinning as you turn it on, agitating the clothing and starting the washing cycle. The spinning drum would beat against the walls of the machine without extension springs, tossing it around the room and creating loud noise as you do your clothes.

Farm Machinery


Due to the force and strength needed to pull, farm machinery uses heavy-duty extension springs. Although "farm machinery" is used broadly, many vehicles utilized on farms will use extension springs. You can use the extension spring to its fullest extent on everything from tractors to combined harvesters. 

People plough fields, move heavy items around the farm, or even trailers tow large goods. While machinery often uses hook or loop-style heavy-duty extension springs, numerous varieties are available. If they notice any problems, like deflated tires or rusted springs, it's time for a change. Farm equipment needs to be updated and safe at all times.

Springs in Trampolines


As a result of the usage of extension springs, trampolines are particularly well-liked. They powerfully illustrate how you can use extension springs in the garden. The trampoline's base is fastened to the steel frame by thousands of hook-end extension springs. It is more flexible because of the number of springs used to hold the ground.

For instance, the trampoline's rebound wouldn't be as agile if it had half the amount of springs and solid connectors. The trampoline's springs are in their coiled state while at rest. 

The trampoline's bouncy quality is caused by the abundance of extension springs at its bottom. Thanks to these extension springs, people can jump without exertion by bouncing back to the trampoline. The trampoline bounces more when it has additional extension springs.



A pram is a common means of transportation for small infants and kids. The pram, or rather perambulator initially named, has been made employing extension springs from its inception: the first Coach Where the expensive strollers were built, Silver Cross. As you rock the baby to sleep in the pram, the springs create the suspension effect.

The springs increased the pram's flexibility and made it easier to maneuver. It's a somewhat big pram, but it was widely used until recently. It isn't easy to get in some of the front doors due to the tiny houses being built today together with pram size.

The first suspension strollers served as the model for all subsequent models. The suspension impact is still present in most modern strollers but to a lesser extent.

Garage Doors


The garage doors also feature extension springs. They support lowering and raising the door since they connect the edges of the doors. Those extension springs reduce the potential force needed to lift and close such doors.



The Chest Expander is the piece of exercise gear most often found with extension springs. A line of extension springs lined up side by side and attached to a metal or plastic handle at each end make up the chest expander's mechanism.

When using the chest expander, draw both handles simultaneously to extend the springs to the desired length. As you let go of the strain, the springs will exert all their force to return to their initial position. It functions by exerting energy on the muscles to pull and resist.

Medical equipment


The functioning of springs has been a staple of medicine for millennia. You can employ extension springs in a wide range of medical equipment. Some of these tools include stretchers, operating lights, and several small handheld devices.

Take away


If you need extension springs for your industry's purposes, you should buy them from professionals. Extension springs store potential energy and provide resistance since they have an object attached to each end. The initial tension of the spring controls how tightly the wind its coils are.

Extension springs differ by extended length, body length, maximum load, hook/loop length, and much more in addition to tension. Additionally, you can choose the loop's location, the distance between its ends, the finish, the material, and a lot more.

You can construct a spring-appropriate for various applications and environments by modifying its multiple properties. Some skilled engineers from Foshan GL Metal can assist you in choosing the right specs for any spring purchase. Contact their staffs to get started designing a set of springs right away.