Gas Struts FAQs: Everything You Need to Know

What is a gas strut?

A gas strut, or gas spring, is a mechanical apparatus utilised for controlled motion. It includes a cylinder filled with compressed gas and a piston. The movement of the piston results in the compression of the gas, generating controlled resistance for precise movement.

WDS gas struts are adjustable, what does this mean?

All WDS gas struts are force adjustable. Every strut is supplied at the maximum force, this is stated in the product data table and printed on the side of the gas strut unit. Using the Allen key supplied, the gas can be let out - reducing the force outputted by the strut. Please note that once the gas has been removed from the cylinder it cannot be added back in, WDS do not offer a refilling service.

How do I decide what strut is suitable for my application?

To choose the right gas strut for your application, start by determining the weight or force the strut needs to support. Calculate the required force by considering factors like the weight of the object and any additional load it may bear. Next, measure the required extended and compressed lengths to ensure the strut fits your space constraints. Consider environmental factors such as temperature and exposure to chemicals or outdoor elements that may affect the strut's material. While WDS can provide advice on selecting the appropriate gas strut, it is ultimately the customer's responsibility to ensure the correct strut is chosen for their specific application.

How do I fit the ball joints onto the supplied brackets?

To remove the ball stud from the ball seat, first the circlip needs to be removed from the ball set. Once this is done, the ball stud can be removed. This can take some force, so some pliers or a vice may be required.

The rod is very stiff and not moving at all, what can I do without letting too much gas out?

Sometimes after the WDS gas struts have been stored or been through temperature differences, the seal can stick at the rod end. This can easily be remedied by giving the thinner piston rod a gently tap with a hammer or mallet. Do ensure that this is done gently as to not damage the strut unit.

How do I ensure the force is set correctly for the application?

It is recommended when letting the gas out, to do this in 1 second bursts to not let too much gas out at a time. If more than one strut is being used on the application then struts need to be set equally, alternating between the struts so they are always set to the same force. To aid with setting these perfectly, we suggest adding an extra 10% to the load the gas strut is lifting then start adjusting. As soon as the load is just supported, remove this additional weight and then the hatch/load will be supported perfectly. When fitting, take note of the arrow on the side of the strut for the correct orientation.

Which way up should I mount the gas strut?

On the side of the strut, an arrow is printed showing which orientation the strut should be when fully installed.

 

I have an existing strut I am trying to replace, what information is most important to get a WDS equivalent?

To get an equivalent gas strut from WDS to replace an existing one, you should focus on the following key information:

1. Stroke Length or Extended and Closed Lengths: Measure the existing gas strut's stroke length, which is the difference between its fully extended and fully compressed lengths. Alternatively, provide the exact measurements of the gas strut when it's open and closed. This information will help you find a compatible replacement from WDS's data table.
2. End Fittings: Note the type of end fittings or connectors used on your existing gas strut. This can include rose joints, angle ball joints, eyelets, clevis forks, or other specialised attachments. Check the WDS website for available end fittings and choose ones that match your requirements.
3. Force Rating: Determine the force rating of your existing gas strut, typically indicated by a number followed by "N" (Newton). For example, "700N" represents a force rating of 700 Newtons. Cross-reference this force rating with WDS's product listings to find a replacement strut with a force rating equal to or greater than your original strut. If your force rating is in kilograms, to convert from kilograms to newtons, multiply by 9.8. 

By providing accurate stroke length or extended and closed lengths, end fitting details, and the force rating, you can effectively identify a suitable replacement gas strut from WDS that matches the specifications of your existing one. Don't forget to verify any additional requirements or features needed for your specific application to ensure a proper fit and functionality.

Should I chose a steel or a stainless steel gas strut?

The choice between a steel or stainless steel gas strut depends on your application's specific requirements. Stainless steel gas struts are corrosion-resistant and ideal for environments where moisture and exposure to the elements are concerns, making them suitable for outdoor or marine applications. On the other hand, regular steel gas struts are cost-effective and may suffice for indoor or less corrosive environments. Consider your application's environment and budget to determine which option is more suitable for your needs.

How long do gas struts typically last?

The lifespan of gas struts varies depending on factors such as usage frequency, operating conditions and various other factors. On average, gas struts can last around 20,000 cycles while maintaining force within 15%.