Compression coil springs, designed to resist being compressed. A typical use for compression coil springs is in car suspension systems. Volute springs are used as heavy load compression springs. A strip of plate is rolled into the shape of both a helix and a spiral. When compressed, the strip is stiffer edge - on than a wire coil, but the spiral arrangement allows the turns to overlap rather than bottoming out on each other.
where is a coil spring on a car
in car suspension systems