STON supplies a complete range of tention gas springs. Sometimes 
referred to as traction springs, these units operate the opposite of compression gas springs. They retract rather than extend. Mounting constraints often do not allow for the use of compression springs. Examples include doors and access panels hinged horizontally at the bottom and any type of cover or lid that must be pulled open or pulled shut. Tension gas springs also find many uses as tensioners on mechanical assemblies and belt drives. In order to accommodate a wide range of force and stroke requirements, STON offers these units in both mild steel and stainless steel construction in a number of sizes.
The column headed Size refers to the rod and body diameters
To calculate the approximate pulled out (extended length) without fittings, use the formulas in the extended length column above. Please contact STON to discuss your specific requirements.
Size Stroke Range Force Range K-Factor Extended Length Materials 6/18 30 – 300 mm 100-600 N 1.55 2 X Stroke + 85 mm Steel / Stainless 8/23 30 – 400 mm 200-1000 N 1.60 2 X Stroke + 85 mm Steel / Stainless 10/28 30 – 500 mm 300-1500 N 1.60 2 X Stroke + 100 mm Steel / Stainless 14/40 50 – 500 mm 500-3500 N 1.70 2 X Stroke + 100 mm Steel / Stainless