a coil spring is on a car in heavy commercial vehicles.
where is a coil spring on a car?
heavy commercial vehicles
section::::spring rate.









































spring rate is the measurement of how much a coil spring can hold until it compresses 1 inch. the spring rate is normally specified by the manufacture. if a spring has a rate of 100 then the spring would compress 1 inch with 100lbs of load. 









































section::::variants.









































types of coil spring are:









































bullet::::- tension/extension coil springs, designed to resist stretching. they usually have a hook or eye form at each end for attachment.









































bullet::::- compression coil springs, designed to resist being compressed. a typical use for compression coil springs is in car suspension systems.
coil spring
coil spring









































a coil spring, also known as a "helical spring", is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. they are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded.









































under tension or compression, the material (wire) of a coil spring undergoes torsion. the spring characteristics therefore depend on the shear modulus, not young's modulus.
coil spring