Cut-Off Introduction Inserts identification system Table 1 Insert hand Hand of lead angle Toolholder Right-hand Toolholder Left-hand R Right-hand L Left-hand R Right-hand Insert Right-hand Insert Left-hand Lead angle Right-hand Lead angle Right-hand TKF 12 R 050 - - S - 16D R PSIRR PSIRR Insert type Insert size Edge width Name of chipbreaker Lead angle (PSIRR) S S-chipbreaker (Front cuttingedge angle) T T-chipbreaker(tough edge) NB Without chipbreaker GDM H Edge width Hand of tool Chipbreaker symbol Tolerance symbol 13 1.3 mm 25 2.5 mm R Right-hand PF Cut-off (Low feed) PM Cut-off (General purpose) G Ground insert 15 1.5 mm 30 3 mm L Left-hand PQ Cut-off (Medium feed) PH Grooving and cut-off (High feed rate) M M class 20 2 mm 40 4 mm N Neutral PG Cut-off (Low cutting force) GD M S 30 20 R - 025 PM - 6D Series No. of edge Insert length Corner-R (RE) Lead angle Grooving / Cut-off No indication 2-edge 16 16 mm 003 0.03 mm 020 0.2 mm No indication 0° GD Series S 1-edge 20 20 mm 005 0.05 mm 025 0.25 mm 6D 6° 010 0.1 mm 030 0.3 mm 15D 15° 015 0.15 mm H2