Process reliability is crucial in the aircraft industry. Due to the fact that the application is based on military specifications, the requirements are particularly high. The application is unique in that the spotfacing is eccentric to the bore.
|Workpiece||Component with eccentric back spotfacing|
|Diameter of final bore||8.3 +/- 0.2 mm|
|Diameter of counterbore||13.0 +/- 0.2 mm|
|Material||Special steel with high strength and corrosion resistance that is difficult to machine.|
In order to realise this back spotfacing, a temporary 6.35 mm bore diameter is created. The bore is then drilled, taking the eccentricity into account – extended to Ø8.3 mm. A BSF special tool is used for this.