The Purpose of Coil Springs

Coil springs have many uses.
••• coil image by Alison Bowden from

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

Related Articles

How to Determine Shock Spring Rate
What Is a Solenoid?
How to Calculate Induced Armature Voltage
Types of Sensors & Actuators
How to Calculate Holding Torque
How to Calculate the Henrys in a Coil
How to Calculate Pneumatic Cylinder Force
How to Determine Shock Spring Rate
Parts of a Motor
What Is a Ferrite Clamp?
How a Solenoid Pump Works
The Differences Between Motors & Generators
How to Calculate Spring Force
How it Works: Voltage Relay
How Does a Torsion Spring Work?
What Are the Functions of a Magnetic Contactor?
How to Calculate Torque on a Shaft
Difference Between Spring Scale & Beam Scale