ALMOST Indestructable Mandrels
I work mostlywith borosilicate glass (better known as Pyrex), which tends to make me a mandrel-killer. These mandrels are stainless steel TIG welding rods so are meant to handle heat…just not the kind of heat I need to make that glass MOVE where and how it’s supposed to move. I burn through 3/32″ mandrels routinely […]