The starting position is identical to case study named "Valve Fitting". Having found a solution for inner intersecting bores, it was obvious to seek also for a solution for the the front deburring which would allow a fully automated machining. The challenge here was the interfering edge above the bore that restricted the accessible area. Furthermore, the closest distance of the bore edge to the wall was a corner with R1.5 only.
The fact that the inner intersecting bores as well as the outer bore edges can be deburred, allows a fully automated machining of the valve fitting.