System code – solid carbide drills Solid carbide drills L/D relation Angle Code Drill Description Code NC tapping device Description A 03 3xD 90 90° 05 5xD 120 120° With inner cooling Turning 08 8xD 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 Milling 0850 8,5 1800 18,0 ... 8 9 C Drilling D Information Technical E Index a b c d a Boring b Drilling c Profile drilling d Centering C29