TurningMillingDrillingTechnicalInformationIndex System code – solid carbide drills Solid carbide drills L/D relation AngleDrillNC tapping device A Code Description Code Description 03 3xD 90 90° 05 5xD 120 120° 08 8xD With inner cooling 10 10 x D 12 12 x D 15 15x D 20 20 x D 30 30 x D 6 7 B Bore diameter [mm] Shank diameter [mm] Code Description Code Description 0200 2,0 S 4,0 0850 8,5 1800 18,0 ... 8 9 C D E a b c d a Boring b Drilling c Profile drilling d Centering C29