Gas Spring Manufacturers and Suppliers

Gas springs were originally conceived and engineered by French inventor Paul Giffard in the late nineteenth century. By 1875, they had already reached the United States. Early development focused heavily on internal pressure and basic pneumatic force generation, while later engineering improvements brought greater attention to materials, sealing methods, rod finishes, and manufacturing techniques that improved durability and performance.

The automotive industry accelerated the rapid advancement and broad customization of gas springs in the latter half of the twentieth century. Their first major use came in car trunks and hoods, where they provided controlled, hands-free opening and closing. As demand grew, gas spring manufacturers expanded on both sides of the Atlantic, scaled production, and refined force control, sealing, and mounting designs. Today, gas springs are a standard motion control component across industrial machinery, aerospace systems, medical equipment, transportation products, and consumer applications.

Gas springs are often chosen over traditional mechanical springs because they combine controlled motion, compact design, and dependable performance. When buyers compare gas springs to metal coils or other counterbalance devices, the decision often comes down to two broad advantages:

Superior Performance
Gas springs typically outperform mechanical springs in several ways. Precision-engineered cylinders and pistons, combined with natural damping, support smoother and more controlled movement than many metal coil designs. This adjustability makes it easier to fine-tune performance for a hood, hatch, lid, cover, seat, or machine guard, and in some cases internal pressure can be adjusted to restore performance instead of replacing the entire unit. Gas springs also offer strong force output, repeatable motion control, and long-term reliability when properly specified.

Ease of Use
In addition to improved functionality, gas springs are generally easier to work with than traditional mechanical springs. They are compact, easier to mount, and often simpler to integrate with socket joints or similar hardware in doors, lids, covers, and adjustable assemblies. Because they do not require external power sources such as electricity, they can simplify system design while still delivering dependable motion control with very little routine maintenance.

Gas springs are well suited for a wide array of industrial, commercial, and domestic applications. Whether you are asking what parts make up a gas spring, how a lift support is built, or how gas spring manufacturers tailor units for specific loads, the underlying design principles remain consistent. Generally, gas springs consist of a familiar set of core components:

The cylinder—also referred to as the tube or body—is the external housing of the gas spring. It contains all other internal components and features a polished interior surface to minimize friction during operation.

Inside the cylinder is a piston and rod assembly. The rod is connected to the piston and extends outward from one end of the cylinder, while the piston head sits perpendicular to the rod within the cylinder. In combination with the sealing system, the piston forms an airtight barrier that separates the cylinder into two distinct chambers.

Seals, such as O-rings, radial shaft seals, or lip seals, are used to maintain airtight conditions and prevent leakage.

Intake and outlet valves are included to regulate gas movement and maintain pressure balance.

A gas charge or reservoir, typically filled with nitrogen, provides the necessary pressure. Nitrogen is commonly used due to its inert nature, which reduces the risk of chemical reactions with internal components.

A small amount of oil is also present to provide damping and lubrication, further enhancing the spring’s performance and longevity.

While the basic structure may appear relatively straightforward, most manufacturers employ advanced tools such as 3D CAD modeling and other specialized design software to develop gas springs tailored to specific applications. That level of engineering matters because, despite the simple appearance, the performance of these pneumatic motion control devices depends on highly precise interactions among all components.

Gas Springs and Physics
Gas springs operate based on a fundamental physics principle: force equals pressure multiplied by area. While the terms "force" and "pressure" are often used interchangeably in everyday language, they have distinct meanings in physics. Force is defined as a one-directional push or pull acting on an object, whereas pressure refers to that force distributed across a surface area. Gas struts are often described as working by increasing the gas pressure inside the cylinder. However, a more accurate explanation is that they function by altering the area over which pressure is applied inside the cylinder. This shift creates a pressure differential that generates the net force needed to move the spring.

When external force is applied or a shock is encountered, the rod connected to external components pushes deeper into the cylinder, moving the piston head toward the opposite end. It’s important to clarify that the piston does not compress the gas by physically squeezing it downward. Instead, it compresses the gas by displacing volume—by occupying more space inside the cylinder, the piston reduces the available space for the gas, causing it to compress.

More precisely, pistons in gas springs have holes or valves that allow gas to flow through or around them, allowing the gas to occupy both sides of the piston within the sealed cylinder. Because no gas escapes the sealed system, it maintains equal pressure on both sides. However, once the piston enters the cylinder, it introduces an internal surface that increases the total area exposed to the gas pressure. This change results in a net force pushing outward—specifically, away from the larger internal area. This output force significantly exceeds the atmospheric pressure acting on the portion of the rod outside the cylinder, causing the rod to extend outward toward the lower-pressure zone.

Using Oil in Gas Springs
Oil plays an important role in gas spring performance by creating damping, or cushioning effects, that help regulate force and movement. Oil accomplishes this by flowing through the same piston holes or valves that facilitate gas movement. Hydraulic damping refers to oil passing through holes or bores in the piston, while dynamic damping involves oil bypassing valves built into the cylinder walls. Damping typically becomes most noticeable near the ends of the spring’s stroke—during both compression and extension. The resistance generated by the oil helps absorb force and slow the rod before it can strike or damage delicate components. A familiar example of this is seen in automotive shock absorbers or suspension systems, where oil-based damping ensures smooth operation over bumpy terrain.

Pistons in Springs
Pistons are engineered to precisely manage the flow of both gas and oil within the gas spring. They are often designed to slow the flow rate intentionally, as the speed of a gas spring’s movement is directly linked to the speed and volume of fluid movement inside. This controlled flow results in smoother, more predictable spring performance. The ability to moderate fluid dynamics within the spring ultimately translates to better control over the products and mechanisms they power. For instance, a gas spring with well-regulated motion allows a vehicle trunk or cabinet door to close gently, rather than slamming shut—a small but meaningful detail that highlights the precision and sophistication of modern gas spring design.

There are several distinct types or designs of gas springs, each suited to specific applications based on how they function and what they’re intended to support. If you are comparing compression gas springs, tension gas springs, locking gas springs, or adjustable gas springs, the right choice depends on force requirements, stroke length, mounting orientation, safety needs, and the motion you want to control. Some of the more commonly encountered designs include:

Extension Gas Springs
These serve as counterparts to compression gas springs, which are the most widely used variety. While compression gas springs provide damping when an external force compresses the piston into the cylinder, extension gas springs are designed to provide support, return force, or isolation when the rod is pushed outward—either partially or fully—by the high internal chamber pressure.

Nitrogen Gas Springs
These pneumatic energy storage devices use compressed nitrogen gas to damp and isolate motion. Known for their longevity and precision, nitrogen gas springs are popular alternatives to mechanical coil or leaf springs, especially in applications that demand consistent force output, repeatable motion control, and reduced wear.

Locking Gas Springs
Equipped with internal mechanisms that allow the rod to lock in place at full extension, these springs are well suited for applications requiring secure positioning, such as medical equipment, adjustable furniture, access panels, and equipment covers where controlled and stable movement matters.

Adjustable Gas Springs
Functionally similar to locking gas springs, adjustable versions can stop the rod at any point along its travel—not just at full extension. This level of control is particularly valuable in hospital settings, adjustable beds, rehabilitation devices, ergonomic workstations, and emergency trolleys where fine-tuned motion is required.

Reducible Gas Springs
These are designed to allow users to modify internal pressure by releasing gas during operation. By doing so, the output force can be adjusted to better suit changing load requirements, user preferences, or updated equipment conditions.

Tension Gas Springs
Opposite in function to standard compression springs, tension gas springs are engineered to maintain tension and perform controlled pulling actions. They are often found in household furniture, cabinets, access doors, and mechanical assemblies where controlled pulling force is preferred over pushing force.

Air Shocks
A specialized form of gas spring built for vibration isolation and damping, air shocks—also referred to as shock absorbers—are common in both industrial and transportation settings. They are used on vibratory equipment such as conveyors and mixers, and are also closely associated with vehicle suspensions, specialty equipment, and aircraft landing gear.

Tool and Die Gas Springs
These industrial-grade gas springs are built for heavy-duty applications and typically feature shorter stroke lengths combined with higher force output. Unlike many other gas springs, they often do not use damping agents, making them a strong fit for tool and die operations, stamping equipment, and compact high-force manufacturing applications.

Dampers
Though gas springs are sometimes casually referred to as dampers, the term technically refers to a different type of device. Dampers are designed to control motion without exerting significant lifting force. Structurally similar to struts, they act more as resistive mechanisms than active springs. In simple terms, they focus on managing speed and motion rather than delivering the counterbalance force associated with gas springs.

As previously noted, gas springs serve a remarkably wide range of applications. At their core, gas springs are designed to make the movement of objects easier, safer, and more controlled. Their ability to store potential energy during compression and then release that energy during extension allows users to carry out lifting and lowering actions that would otherwise require greater effort. A classic example is the trunk of a car, where stored energy from the closing stroke helps lift the trunk open smoothly after it is unlatched. Beyond motion assistance, gas springs are also used to hold objects in stable, fixed positions and to reduce operator strain.

These devices have become widely used across nearly every industry. Gas springs are found in furniture manufacturing, medical and rehabilitation equipment, aerospace systems, office furniture, agriculture, marine operations, pharmaceuticals, food processing, mechanical engineering, and transportation equipment. In more specialized cases, they appear in tanning beds, awning extension systems, industrial conveyors, machine enclosures, and aircraft landing gear.

The automotive industry remains one of the clearest examples of gas spring value. As demonstrated with the car trunk, gas springs are a key feature in many vehicle components. They are widely used in tailgates, hoods, door supports, suspension systems, sunroofs, seat adjustment mechanisms, steering dampers, and lift-assist assemblies—helping make modern vehicles safer, more convenient, and easier to operate.

As previously mentioned, gas springs are engineered with a high level of precision, making them highly customizable. Nearly every component or performance characteristic of a gas spring can be adjusted to meet the demands of a specific application. If you are trying to choose a gas spring by material, force, size, stroke, or mounting style, these examples show how flexible the category can be:

While aluminum and stainless steel are standard construction materials for gas springs, manufacturers and suppliers frequently offer alternatives. Highly customized gas springs can be made from specialized materials such as polyurethane or EPDM synthetic rubber, depending on the operational environment and performance requirements.

The type of gas used within a spring plays an important role in its functionality. Nitrogen is the most commonly used gas due to its inert nature, which minimizes chemical reactivity and promotes stable performance. However, carbon-based gases are also used in some applications, offering similar benefits and remaining suitable for many industrial settings.

Gas springs vary widely in size. They can range from compact units only a few inches long to large industrial models measuring several feet in length. Equipment that requires especially large or powerful gas springs—such as dynamometers used for engine testing—relies on oversized models designed to accommodate heavy loads and extended stroke lengths.

Load capacity is another major factor and is directly linked to both internal fluid flow and the force exerted by the spring. This capacity can vary from under one hundred pounds to more than eighty-eight thousand pounds, depending on size, configuration, internal pressure, and material selection.

The ideal specifications for a gas spring are highly dependent on the application and the industry it serves. Similar to mechanical springs, several physical and performance factors should be reviewed when selecting the appropriate design. These include cylinder diameter, rod diameter, mounting style, overall package size, working temperature range, absorber stroke, extended and compressed lengths, force ratings, and maximum cycle frequency.

Proper customization starts with clearly identifying the most demanding conditions under which the gas spring will operate. For instance, body material selection is important—not only must it withstand physical stress, but it must also resist chemical and environmental exposure. Applications in corrosive environments such as food processing, marine industries, or pharmaceutical manufacturing often require non-corrosive gas springs.Stainless steel is often chosen for these conditions, while other options like thermoplastics, aluminum, and steel may be treated with black nitride or chrome plating for added durability and corrosion resistance.

By matching the material, size, force output, and performance characteristics of a gas spring to the specific demands of its application, manufacturers can support long-lasting, reliable performance even in demanding operating conditions.

Gas spring manufacturers and industry-specific professionals can offer valuable guidance when selecting the right gas spring for a particular application, helping buyers balance safety, performance, lifecycle value, and fit. While competitive pricing matters, there are additional factors to keep in mind when comparing gas spring suppliers and manufacturers:

Levels of Certification
Look for suppliers that meet recognized standards, such as relevant ISO certifications and documented quality practices. These certifications can reflect a commitment to quality, traceability, environmental responsibility, and repeatable manufacturing processes.

Level of Customer Support
Evaluate the supplier’s willingness to provide hands-on assistance, including application guidance, technical advice, troubleshooting, and, when needed, installation support. Strong customer support can make sizing, mounting, and replacement decisions far easier.

Ability and Willingness to Customize Products for Your Specific Applications
A reliable supplier should not only have the capability to tailor gas springs to your exact needs, but should also be ready to work closely with you on application-specific solutions involving force ratings, stroke lengths, end fittings, materials, and mounting requirements.

Gas springs are precisely calibrated to withstand demanding applications involving varying pressures and changing operating speeds. That level of precision matters because failure in industrial, transportation, or equipment settings can lead to equipment damage or personal injury. Beyond careful engineering, proper usage is important for both safety and service life. This includes following each gas spring’s intended load capacity, mounting orientation, and operational limits.

One of the major advantages gas springs have over traditional mechanical alternatives is their long service life with minimal maintenance requirements. However, while they generally require little upkeep, gas springs should still be responsibly recycled at the end of their usable life—whether due to wear, accidental damage, or system replacement. Once safely depressurized and drained, used gas springs are recyclable like other metal components, making them a durable and environmentally responsible choice.

Compressed Length
The minimum overall length of the gas spring when the shock is fully compressed.

Damping
Achieved by regulating the flow of gas through a valve at the orifice of the gas damper piston. This creates a cushioning effect that slows the mechanism as it nears full extension, preventing sudden or harsh movement.

End Fittings
Components used to attach the gas spring to the object it is designed to control. These may include various types of mounting brackets, depending on the specific application and purpose.

Extended Length
The maximum length of the gas spring when it is fully extended.

Force
Measured 5mm from the point of full extension, this is a function of the internal cylinder pressure acting on the cross-sectional area of the rod. A larger rod diameter results in a lower force output due to reduced pressure application.

K-Factor
The ratio of compressed force to extended force, with compressed force always being greater than extended force.

Piston
A cylindrical or disk-shaped component that moves or displaces fluid within a larger cylinder under pressure, serving as a key part of the gas spring's internal mechanism.

More Gas Spring Information