General turning ISO code – ceramic inserts T N G A 12 04 08 T 020 20 A 1 2 3 4 5 6 7 8 9 10 Insert shape Clearance angle Tolerance class Turning A 85° B 82° C 80° A B m 3° 5° I.C S D 55° E 75° H Code I.C [mm] m [mm] S [mm] C D A ±0,025 ±0,005 ±0,025 7° 15° B K 55° L M 86° C E ±0,025 ±0,025 ±0,013 ±0,025 ±0,025 ±0,025 E F F ±0,013 ±0,005 ±0,025 20° 25° G ±0,025 ±0,025 ±0,130 P S T H ±0,013 ±0,013 ±0,025 Milling J ±0,05–0,15 ±0,005 ±0,025 G N V 35° W 80° Z Special 30° 0° K ±0,05–0,15 ±0,013 ±0,025 L ±0,05–0,15 ±0,025 ±0,025 M ±0,05–0,15 ±0,08–0,20 ±0,130 P O Special 11° N ±0,05–0,15 ±0,08–0,20 ±0,025 U ±0,08–0,25 ±0,13–0,38 ±0,130 C 1 2 3 Fastening features (metric) Cutting edge length l [mm] Insert shape Insert shape Drilling > 65° I.C [mm] A B l l l l l l C D S T V W > 65° 3,97 06 C N 5,0 5,56 09 ≤ 65° ≤ 65° 6,0 Q W D 6,35 8,0 06 07 11 11 X Special 9,525 09 11 09 16 16 06 10,0 Information Technical 12,0 12,7 12 15 12 22 22 08 15,875 16 15 27 16,0 19 19,05 19 19 33 20,0 25,0 25 25 E 25,4 31,75 25 32 4 5 Index A 174