If you don't count automatic machinery, coil springs have basically been made the same way for the last 300 years. But try to learn how to do it yourself and you'll find that no one has written up "how to do it" for anyone except mechanical engineers. If you want to learn to bend wire, you have to sit at the elbow of a professional springmaker and hope he'll teach you. After 300 years, it's about time the "how-to" was made available, so here it is. Grab a six-pack, pull up a stool, and read all about how to make springs.