Gas Spring vs Mechanical Spring: Making the Right Choice

Two Different Approaches to Lifting

Engineers and DIY builders frequently face the gas spring vs mechanical spring dilemma. While both store energy and provide lifting force, their force curves, space requirements, and operational feel are entirely different.

Mechanical Springs (Coil & Tension)

Mechanical springs obey Hooke's Law: the more you compress or stretch them, the harder they push back. This creates a very steep 'force curve'.

• Pros: Virtually infinite lifespan, immune to extreme temperatures, no seals to leak.
• Cons: Highly variable force (very strong when fully compressed, very weak when almost open), requires more physical space, sudden snapping motions.

Gas Springs (Gas Struts)

Gas springs offer a much flatter force curve. A 500N gas spring will provide roughly 500N of force throughout almost its entire stroke.

• Pros: Smooth and controlled lifting, built-in hydraulic damping (soft-stop at the end), compact size relative to lifting power.
• Cons: Limited lifespan (typically 5-10 years depending on use), seals can fail in highly abrasive or corrosive environments.

Conclusion

If you are building an automotive hood, a medical bed, or an overhead cabinet, the smooth, controlled, and flat force output of a gas spring makes it the vastly superior choice. Mechanical springs are better reserved for heavy industrial machinery where lifespan and raw durability trump smoothness.