The aeronautic industrie sectors use special materials like titanium, stainless steel and aluminium, etc. The end pipe prep need to be perfect without any marks nor square. The DE3-25, 20-63, TUDC 76, 114 , 168 machines are made for this application.
They are often proposed with a specific support with tools and collets. The Airbus contractor are very pleased to use them for the obvious quality.