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Stabilus Group

Step by step to the perfect solution Tension springs from HAHN Gasfedern

Schwarze Zugfeder auf modernem Hintergrund, steht für Präzision, zuverlässige Unterstützung und präzise Bewegungssteuerung.

Our tension springs are used whenever conventional gas pressure springs reach their limits and flexible, space-saving solutions are required.  Thanks to our modular system, we can offer you many customizations and extras as standard. A special advantage of our tension springs lies in the materials used: V2A (AISI 304) and V4A (AISI 316) stainless steel are not only durable and corrosion-resistant, but also open up flexible application opportunities that many other suppliers cannot cover.

Tension gas springs offer space-saving solutions

Gas tension springs can be used wherever a normal tension gas spring cannot due to space constraints. Tension springs provide optimal support, particularly in confined spaces or special application areas – such as, for example, in elevator exit hatches or desks with hinged work surfaces. They allow for the power-assisted opening of hatches that have to be pulled upwards.

Functional principle

The tension gas spring is a low-maintenance system consisting of a pressure tube, a piston rod, and a piston. It is filled with compressed nitrogen, which creates the spring force. There is a seal on the piston rod guide that minimizes gas loss. Tension gas springs also have an atmospheric bore that allows a connection between the environment and the interior of the tension spring to compensate for pressure differences. They work in accordance with the reverse functional principle of gas pressure springs: The gas pressure in the cylinder pulls the piston rod inward. When closing a hatch, the tension spring supports the hand force.

When unloaded, the piston rod of a tension gas spring is always retracted. When the piston rod is pulled out, the volume in the cylinder decreases and the gas is compressed. This increases the force (progression), the extent of which depends on the diameter of the piston rod and the volume of the cylinder. The standard tension gas springs from HAHN are undamped and do not have a nozzle bore. An exception is the ZD special tension spring, which is equipped with a small opening (nozzle) in the piston. This nozzle bore allows the gas to flow through and ensures a defined extension speed of the piston rod. The cross-section (diameter) of this opening determines the degree of damping for this particular spring.

Series and sizes

You can find all our different series and sizes in our catalog.

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Options and materials that are suitable for every challenge

We offer tension gas springs in various designs for precise motion control. Each variant and each material offer specific customization options to optimally meet your requirements:

Tension gas springs

Flexible applications thanks to different materials

Tension gas springs with damping

Allow for controlled retraction speed and end-position damping

Lockable tension gas springs:

Infinitely lockable, ideal for applications in confined spaces and under high loads

Our tension gas springs are available in various materials, each offering specific advantages and applications:

Steel

Robust and versatile for standard applications

V2A (AISI 304) stainless steel

Corrosion-resistant and durable, ideal for applications in humid environments

V4A (AISI 316) stainless steel

Highest corrosion resistance, suitable for demanding environments, such as the chemical industry or maritime environment.