Understanding The Mechanics: How Gas Struts Work?

Gas struts are an integral part of numerous applications, from automotive engineering to furniture design. These ingenious devices operate on a simple yet effective principle, harnessing the power of compressed gas to provide controlled and reliable movement. In this article, we delve into the mechanics behind gas struts, shedding light on their inner workings and exploring their various applications.

The Basics Of Gas Struts

Gas struts, also known as gas springs or gas lifts, consist of a sealed cylinder containing pressurized gas and a piston rod. Usually composed of sturdy materials like steel or aluminium, the cylinder offers dependability and longevity. A precisely measured volume of gas, as provided by Selectlok gas struts, is sealed under intense pressure inside the cylinder.

Compression And Extension

The key to understanding how gas struts work lies in the balance between compression and extension forces. When a force is applied to compress the gas strut, such as when closing a car boot or lowering a heavy lid, the gas inside the cylinder is compressed. This compression generates a resisting force that counteracts the external force applied, allowing for controlled movement.

Conversely, when the external force is removed, the stored energy in the compressed gas pushes against the piston, causing the gas strut to extend. This extension force assists in lifting or opening the object to which the gas strut is attached, providing support and stability throughout the motion.

Pressure And Damping

The pressure of the gas inside the cylinder plays a pivotal part in determining the performance characteristics of a gas strut. Higher pressure results in a greater resistance to compression and extension, making the gas strut suitable for applications requiring more force or heavier loads.

Additionally, gas struts often incorporate damping mechanisms to regulate the speed of movement and prevent sudden jolts or vibrations. This damping effect is achieved through the use of valves or orifices that control the flow of gas, ensuring smooth and controlled motion.

Applications Of Gas Struts

Gas struts find widespread use across a diverse range of industries and applications. In automotive engineering, they are employed in tailgates, bonnets, and hatches, providing effortless opening and closing mechanisms while maintaining safety and reliability.

In furniture design, gas struts are used in recliners, adjustable beds, and office chairs, enhancing comfort and convenience for users. They are essential in a variety of residential and business applications due to their capacity to handle large loads and provide seamless movement.

Gas struts are also utilized in industrial machinery, medical equipment, and aerospace technology, where precision, reliability, and safety are paramount. Whether it’s lifting heavy machinery components or supporting delicate medical instruments, gas struts offer versatile solutions for a wide range of challenges.

Benefits Of Gas Struts

The use of gas struts offers several benefits compared to traditional mechanical springs or hydraulic systems. Their compact design and self-contained operation make them easy to install and maintain, decreasing downtime and maintenance costs.

Furthermore, gas struts provide consistent performance over their lifespan, with minimal wear and tear compared to mechanical components. This reliability ensures long-term functionality and reduces the risk of unexpected failures or malfunctions.

Gas struts also offer precise control over movement, allowing for smooth and controlled operation in various applications. Whether it’s opening a car boot with a gentle push or adjusting the height of a hospital bed with precision, gas struts provide reliable support and stability.


Gas struts represent a remarkable engineering innovation that has revolutionized numerous industries and applications. By harnessing the power of compressed gas, these versatile devices offer controlled movement, reliable support, and enhanced convenience across a wide range of scenarios.

Understanding the mechanics behind gas struts enables us to appreciate their efficiency, reliability, and versatility. Whether it’s in automotive, furniture, industrial, or medical applications, gas struts continue to play a vital role in modern technology, improving functionality and enhancing user experience.

Thomas Jung

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