The limits of the extrusion
The dimensions of the extrusions we can produce are governed by both the capacity of the presses and by what is possible purely in terms of tool engineering.
The press opening indicates the maximum limit of what can pass through the press, an extrusion design must therefore be kept to within these outer limits. In addition, a tool is required that can press the required extrusion in an efficient and accurate manner. Extremely large or small extrusions often require special consideration during component and tool design with regard to material thickness etc.