Our friend Daniel Eindhoven will be selling Handmade Teslacoil Toroids along with other high voltage fun parts on his new web store.
“If you want to spin something you first need a mandrel to spin the metal sheet onto. The mandrel can be made of a variety of materials, but if you want it to last you’re best off making them of steel. I started with two steel disks (190 x 45 mm). To spin a toroid you need two different mandrels, one to spin the inner radius and one for the outer radius. The toroid consists of two spun halves, bolted together.”