Motion Control Heroes: How Gas Struts Quietly Do the Heavy Lifting

Gas struts are an essential yet often overlooked piece of engineering that makes lifting, lowering, and holding objects a breeze. Whether it’s the boot of your car, the lid of a toolbox, or an industrial hatch, gas struts provide the necessary assistance to ensure movement is smooth and controlled. But how exactly do they work?

At their core, gas struts—also known as gas springs—operate using the principles of compressed gas and hydraulic damping. Each strut consists of a sealed cylinder filled with nitrogen gas, a piston rod, and hydraulic oil. The gas inside is under pressure, creating a force that pushes against the piston, which in turn extends the rod outward. This controlled expansion counteracts the weight of the object being lifted, making it feel significantly lighter.

Unlike traditional mechanical springs, which rely on coiled metal for resistance, gas struts use pressurised gas to provide a more consistent and smooth operation. This is particularly useful for applications where controlled motion is necessary—such as in vehicles, machinery, and furniture—because it prevents sudden jolts or erratic movements.

The damping mechanism inside gas struts plays a crucial role in ensuring a slow and controlled closing action. When the gas strut is compressed, oil inside the cylinder passes through small channels, regulating the speed at which the piston moves. This is why the boot of your car doesn’t suddenly slam shut but instead lowers gently into place.

One of the key advantages of gas struts is their versatility. They are used in everything from automotive applications, where they help lift car bonnets and tailgates, to industrial machinery, where they support heavy panels and safety covers. They are also commonly found in domestic furniture, such as adjustable chairs and cabinet doors, where they provide seamless motion control.

Ultimately, gas struts are an ingenious solution to the problem of lifting and controlling weight. They reduce strain, improve safety, and enhance convenience, all while operating with remarkable efficiency. The next time you effortlessly open a heavy lid or notice how smoothly a door glides shut, take a moment to appreciate the simple yet effective science of gas struts.

As a trusted partner of world renowned brand Stabilus, here at FA Parkes we have thousands of Gas Struts available to order, whether you're looking for a particular application solution or need to discuss your motion control requirements, our team of trained experts are on hand to ensure you get the best possible advice and make sure you get exactly the part you need.

You can read more about our full range of Stabilus products here, or alternatively contact us today and a member of our team will be in touch soon so we can work together to find exactly the right solution for your application needs.