Coil springs are used in mechanical devices from car shocks to watches. Coil springs are commonly called compression springs, torsion springs or helical springs. They store energy and release it to absorb shock or maintain a force between two contacting surfaces.
A coil spring is a spiral or helix of metal wire that is usually made of steel. Springs are mechanical devices that accept a weight or force from one object to absorb the energy and to prevent the surface from being damaged.
Compression coil springs are designed to push back on a surface when it comes into contact with it. They offer resistance to a compressive force and are usually coiled as a constant diameter cylinder, or one that has the same size curves to its helix shape. Expansion coil springs pull on two surfaces, like the spring found on screen doors that pulls it shut after it has been opened. Expansion coil springs are also called torsion springs.
Coil springs are used in car suspension systems and clutches, as well as valve springs. Springs are also used in mechanical devices, such as toasters, door handles and other types of handles that are constantly depressed
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