Unlike compression springs, torsion springs store energy through a torque.
They are therefore not characterized by a linear force, but by a torque expressed in N·m.
Torsion springs have their own specific characteristics:
- They operate in the direction of the coil.
- Its geometry changes as it is used. Specifically, the diameter of the coils decreases and the length of the body increases. This is why a guide shaft is necessary to ensure that the spring winds evenly.
Torsion springs are very commonly used in return mechanisms (locks, handles, latches) and in door hinges (garage doors).