Help Centre

We’re here to answer all your questions around the correct application of gas struts and dampers. From key terminology, an introduction to gas struts and our series of how to videos, to selecting the right product, sizing, customisation and our range of FAQs, our Help Centre contains all of the information you’re looking for. You can also ask an expert through our adjacent contact form, with our designers and engineers on-hand to answer questions specific to your product or application.

Click here to download and complete our Gas Spring Sizing Form or here to download our Gas Spring Application Enquiry Form and submit either when completing our Ask The Expert form to help our designers and engineers with your query.

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  • Getting Started
    Introduction to a Gas Spring Construction of a Gas Spring Gas Spring Terminology Forces and Spring Rates Gas Spring Standards
  • Selecting The Right Product
    The Two Key Questions Standard Gas Spring Sizes Which Product is right for me? Technical Data
  • Customisation
    Tailoring your Gas Spring
  • Want to Know More?
    Do’s and Don’ts Mounting Position Terminology Mounting Orientation Mounting – Other Considerations Mounting – Practical Considerations Whitepaper – Understanding the Basics Whitepaper – Gas Spring Overview Whitepaper – Gas Spring Overview (Part 2) Whitepaper – Gas Spring Mounting
  • Show Me How
    How to fit and de-gas a Vari-Lift valved gas spring (gas strut) Stop & Stay Multi-Positional Gas Springs Cam-Stay – Multi-Positional Telescopic Stay
  • Troubleshooting
    Frequently Asked Questions
  • Datasheets
    General Range Overview Camloc Motion Control ISO 9001 Certificate Gas Spring Application Enquiry Form Gas Spring Sizing Form Vari-Lift Instruction Safety Leaflet Gas Spring Disposal Advice MSDS Gas Springs Ref:112 MSDS Blocklifts Ref:126 MSDS Dampers Ref:125

Mounting – Other Considerations

Mounting 2.0 Figure Thirteen 207x300 - Mounting - Other Considerations

Crossover 

Crossover is the point at which the strut takes over the lifting action (or gravity takes over to close). This will normally be around 10° to 30° from fully closed. In practice, this will vary by several degrees between opening and closing, due to factors such as friction of the internal components of the spring, hinges and end connectors. 

Self-Rise & Self-Close 

Self-rise is the angle at which the gas spring will lift the lid without any assistance from the operator, similarly Self-close is the angle at which the lid will close without any assistance. In most cases it is undesirable to have the lid open without any operator input (referred to as “instant lift”) because this behaviour is unpredictable to the operator and can allow the lid to open without warning, for example when the P1 force increases above nominal due to elevated ambient temperatures. 

Effects of Temperature on Handling 

Temperature not only affects the output force, but also the handling forces. The following graphs shows behaviour on an application at 20°C and then again at 65°C. As is seen in the figure below, at 20°C crossover occurs at an opening angle of around 7°, with the handling forces being acceptable in both opening and closing. 

Mounting 2.0 Figure Fourteen 300x188 - Mounting - Other Considerations

Crossover at 20°C

Mounting 2.0 Figure Fifteen 300x188 - Mounting - Other Considerations

Crossover at 65°C 

However, when the ambient temperature increases to 65°C (for example, in the case of an engine cover application), lift will occur almost instantaneously. This behaviour is unpredictable to the operator and can in some cases be dangerous. It can also be seen that the handling effort to close the application increases.  

For these reasons it is important that the designer understands what the ambient and “normal” operating temperatures of an application will be so that if necessary a suitable compromise can be made in handling performance. 

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From our base in Leicester, UK, we design and manufacture quality-engineered solutions in motion control.

At Camloc, we are more than just a manufacturer of Gas Springs and Dampers.