Extension springs are similar to compression springs, but they differ from the latter in that they react to an axial force which tends to extend their length.
They are usually made of a round section wire, wrapped around an axis, with coils touching in most cases.
When load is applied and the two ends stretch, the spring starts to make a resistance which is usually proportioned to the size of the load.
In order to enable extension, these springs have eyelets at their ends.
Mollificio Italiano can make eyelets in various forms which go from the more traditional, “English” or “German”, to the more complex shapes in order to meet all applications and assembly requirements.
They can be found in everyday objects, such as electrical appliances, or they can enable the operation of any kind of machines in any industrial sector.