Designed to withstand opposing efforts.
» The measures that define a extension spring are the following:
- Lt = total length of the spring at rest
- Lc = length of the spring body
- De = outside diameter
- Di = inside diameter
- H = wire diameter
- Total number of turns
- Direction of the spiral (if not indicated, it will be manufactured at will)
- Types of hooks (English, German, gyratory, open, closed, double…)
- Situation of the hooks (crossed, straight…)