Gas Springs in Industrial Applications – Guide | AxiSpring
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Gas springs look simple - a cylinder, a rod, and a controlled push force - but selecting the right one requires understanding a handful of key parameters. This guide explains how gas springs work, what the specifications mean, and how to choose the right one for your application.
How gas springs work
A gas spring is a sealed cylinder filled with nitrogen gas under pressure. When compressed, the rod pushes against the gas and the spring resists. When the load is removed, the gas expands and pushes the rod back out - producing a consistent, controlled extension force.
Unlike coil springs, gas springs produce force across their entire stroke without the need for preloading. This makes them ideal for applications where controlled, progressive resistance is needed in a compact package.
Key parameters explained
Extension force (F1, in N) - the force the gas spring produces when fully extended. This is the primary selection parameter. Choose a spring whose F1 matches the load you need to support or move.
Stroke (mm) - the distance the rod travels from fully extended to fully compressed. Your application's travel determines the minimum stroke required.
Total length (mm) - the overall length of the gas spring when fully extended. Critical for fitting within your design envelope. Note that compressed length = total length minus stroke.
Rod diameter (mm) - affects the surface area that the gas pressure acts on, influencing force output. Also determines the bore size required for your guide.
Cylinder diameter (mm) - the outer diameter of the body. Ensure adequate clearance in your housing.
Typical applications
- Machine guards and covers - hold open positions safely without mechanical latches
- Industrial hatches and doors - controlled opening and closing with adjustable force
- Press tooling - blank holders and strippers in sheet metal forming
- Agricultural and construction equipment - hood and door support
- Medical and laboratory equipment - adjustable positioning under load
Mounting considerations
Gas springs should always be mounted with the rod pointing downward when possible. This keeps the internal oil seal lubricated and extends service life. If horizontal or rod-up mounting is unavoidable, select a spring specifically rated for that orientation.
End fittings (clevis, eye bolt, ball socket) connect the gas spring to your structure. AxiSpring stocks a range of compatible end fittings to match our gas spring range - choose the fitting type based on your joint geometry and required range of motion.
Force vs stroke trade-off
A longer stroke at the same cylinder volume means lower gas pressure and therefore lower force. If you need both high force and long stroke, you need a larger cylinder diameter. Use the filter table in our gas spring collection to balance these parameters for your application.
Find the right gas spring
AxiSpring stocks gas springs across a wide range of forces, strokes and lengths for immediate delivery. Use the filter table to search by extension force, stroke and total length.
Need a non-standard force or mounting configuration? Contact us for a custom quote.