[This Old Tony] teaches us how to make springs on a lathe in this video done in the style of How It’s Made. Mixed in with snark, in his usual style, is a lot of useful information. The Machinery ...

You'll need a mandrel, for instance, the metal cylinder you slap into a lathe to spin your wire around. For compression springs, it can just be a bar with a whole through it, but torsion springs ...