The manufacture of countersinks, in particular screw head countersinks, are carried out mostly by back machining and are very time consuming. Either the workpiece is machined on the front surface which entails a turning of the workpiece. After the turning, it is evident that readjusting is inevitable and the time needed has tripled – or the machining is done backward. Most commonly a screw-on-type countersink or counterbore tool is used. The issue here is that – having to machine serveral hundreds of bores – all bores have to be approached individually because the countersink cap has to be fixed first every single time. Needless to mention that this takes a lot of time.

The high amount of time invested in each bore and the lacking process capability have led to rethinking this process.