I had my friend Kevin, who operates a small welding shop, make my first cone kiln based on the dimensions of the 100 cm Moki kiln.
Here are quick specs on the cone kiln if you want to try making your own: It was made from a 4x8 sheet of 16 gauge steel with 3/8" rod welded around top and bottom rims for stability. Top diameter is 43". Bottom diameter is 16" and height is 16". It is open on the bottom. That's it. My welder had a heck of a time bending the steel to make the seam weld. Needs a couple of strong guys or preferentially a differential slip roller to roll the form into shape. You could also make it from lighter weight steel.
My cone kiln:
Here are quick specs on the cone kiln if you want to try making your own: It was made from a 4x8 sheet of 14 16 gauge steel with 3/8" rod welded around top and bottom rims for stability. Top diameter is 43". Bottom diameter is 16" and height is 16". It is open on the bottom so you just roll it away when you are done. That's it. My welder had a heck of a time bending the steel to make the seam weld. Needs a couple of strong guys or preferentially a differential slip roller to roll the form into shape. You could also make it from lighter weight steel. - See more at: http://www.greenyourhead.com/cone-kiln/#sthash.4k5ZWqI8.dpuf
