Choosing the right gas strut can be tricky without the right measurements. Whether you’re replacing a worn-out strut or fitting a new one, knowing how to measure for gas struts correctly ensures your application operates safely and efficiently. This guide walks you through the process in simple steps, helping you avoid common mistakes and get it right the first time.
Why accurate measurements matter
Getting the correct measurements for your gas strut is essential. A gas strut that’s too short won’t open your lid fully, while one that’s too long or powerful may damage the hinges or mounting points. Worse, the wrong strut can pose a safety risk by failing to hold the object open securely. That’s why it’s critical to understand how to measure for gas struts with precision.
Measuring an existing gas strut
If you’re replacing an old gas strut, the easiest method is to measure the strut you already have. Here’s how:
- Extended length: Measure from the centre of one mounting point to the centre of the other while the strut is fully extended.
- Stroke length: Subtract the closed length (eye-to-eye) from the extended length.
- Diameter: Note the thickness of the rod and the cylinder.
End fittings: Record the type of mounting on each end (e.g. ball joint, eyelet, angle bracket). - Force: Look for a printed value on the cylinder, typically listed in Newtons (e.g. 400N).
Once you have these figures, use our replacement tool to find an exact or equivalent match.
Measuring when you don’t have a strut yet
Starting from scratch? No problem. If you’re fitting a gas strut to a brand-new application, follow these steps:
- Determine the lid weight: Use a scale or estimate the weight of the lid or object.
- Measure the lid dimensions: Record the width, height, and thickness.
- Find pivot points: Measure where the hinges are placed.
- Decide the opening angle: Choose how far you want the lid or door to open.
- Use our calculator tool: Plug these measurements into our gas strut calculator. It will simulate your setup and recommend the correct strut length and force.
This method is ideal for new projects or if you’re upgrading an old setup without reliable measurements.
Our tools make measuring easier
At Gasspringsshop.co.uk, we offer three free online tools to help you:
- Gas strut calculator : Perfect for new applications. Input your data and receive a precise recommendation.
- Replacement tool : Already have a gas strut? Just enter the part number to find a match.
- Configurator tool : Want to build your own? Choose materials, fittings, and force level in Newtons. See your design in 3D.
Practical example: measuring for a storage chest
Let’s say you have a wooden storage chest that you want to fit with gas struts. You measure the lid to be 90 cm wide, 50 cm deep, and weighing 12 kg. You want the lid to open to about 70 degrees.
Input this into our calculator tool. It will recommend two gas struts of a certain length and force, with exact installation points marked. You can then order them directly, knowing they’ll work perfectly.
Installation tips for accurate measurements
To get the most from your gas struts:
- Always install with the rod facing down
- Follow the mounting distances recommended by the calculator
- Use a smartphone angle tool to determine your current opening angle
- If unsure, contact our team with your lid details and we’ll advise you
Ready to measure and order?
Don’t guess, measure with confidence using our expert tools. Whether you’re upgrading an old system or building something from scratch, our online tools and support team make the process easy.
Frequently asked questions
- Can I measure my gas strut while it’s installed?
Yes, but it’s more accurate to remove the gas strut and measure it fully extended. This gives the most precise extended length. - What if my gas strut has no label or force information?
Use our calculator tool to estimate the required force based on your application’s weight and dimensions. Or contact our support team for help. - How many gas struts do I need?
It depends on the width and weight of your lid. Most chests or cabinets require two, placed symmetrically. - How do I know which mounting ends to choose?
Check what mounting brackets you have or prefer. We offer ball joints, clevises, eyelets and angle brackets, all visible in the configurator. - Can I reuse old mounting brackets?
Yes, if they’re compatible with your new gas struts. Otherwise, we recommend ordering new fittings to ensure a secure and safe installation.
