08-14-2012, 01:29 AM
The spinning of a helmet bowl has an all around flange and is made by a ring being pulled over the flexible metal against a former, a cast patera would throw itself completely out of balance on any lathe.
In fact it is hard to imagine just why anyone would want to spin a cast object to thin it down for it would indeed be cast at a pre-determined thickness anyway thin if needed.
If we go back to page two of this topic there is a patera that is beaten out and a cast base fitted afterwards, in fact there is another cast base from the other one next to the complete patera.
In fact it is hard to imagine just why anyone would want to spin a cast object to thin it down for it would indeed be cast at a pre-determined thickness anyway thin if needed.
If we go back to page two of this topic there is a patera that is beaten out and a cast base fitted afterwards, in fact there is another cast base from the other one next to the complete patera.
Brian Stobbs