Currently where I work, we make shoulder dies by "pressing" a model into cerrocaste. the downside to this method is that it takes alot longer as a model ring must be made, then casted and sent for "pressing", then the shoulder dies need to be mapped out.
I've been told that cutting the shoulder on a cnc machine directly into the die is much faster and more accurate.
does anyone know a good way to make dies this way?
You want to get in contact with Kevin Potter. He makes presses and dies and probably could answer your questions much better than just about anybody I know http://www.potterusa.com/