How to correctly measure torsion springs for sectional doors – step-by-step instructions
Precise measurements are essential to finding the right torsion spring for your sectional door . In this guide, we'll show you what to look for – including direction of rotation, dimensions, and safety tips .
1. Measure the inner diameter (ID)
Use a caliper to determine the inner diameter of the spring —the distance between the inner edges of the coils.
2. Determine the wire diameter
Measure the wire diameter with a caliper. Take several measurements at different locations and calculate the average value.
3. Spring length in relaxed state
Determine the length of the spring in its unloaded state —without the spring heads. Place the spring flat and measure precisely.
4. Direction of rotation: left or right?
Viewed from the outside (gate front):
- Left mounted = left-handed
- Right mounted = right-handed
Special cases: For centrally mounted shafts or rear mounting (e.g., with low-headroom fittings), the direction of rotation is reversed. If you are unsure, please contact us.
5. Determine shaft diameter
Measure the outer diameter of the torsion bar on which the spring sits. This value is important for the spring's fit.
6. Don’t forget the spring break protection
For all gate systems – whether manual or motorized – we strongly recommend the use of a spring break device . This prevents the gate from falling uncontrollably in the event of damage.
7. Always replace both springs at the same time
Replacing only one spring at a time often leads to uneven tension and premature wear . Therefore, always replace both springs – for safety and functionality.
Conclusion: Exact dimensions – reliable function
With these measuring points, you can find the right spring quickly and reliably. We would be happy to advise you personally – by phone or email. Or browse our shop for suitable torsion springs. .