springs

["S.G.Schiro" <gschiro@qsky.com>]

Springs having the same bar thickness, resting length, number of coils
and diameter probably have the same rate, assuming the same material and
material processing ( i.e. type of steel and heat treating).  The most
accurate ways to measure rate are 1) take a sample spring to a
manufacturer who will have the test equipment to measure the rate or 2)
find a friend at a testing lab or university that has access to a
compression testing machine.

George