External turning Introduction  External turning toolholders identification system (Square shank) Clamping system Insert shape A Back clamp C 80° Rhombic C Top clamp D 55° Rhombic D Double clamp R Round M Multi lock S 90° Square Hand of tool P Pin lock or lever lock T 60° Triangle R Right-hand D S Screw clampWWedge lock V 35° Rhombic L Left-handW80° TrigonNNeutralShank heightShank height in mm Shank width Manufacturer´s optionShank width in mmOptional mark or number D C L N R 20 20 K 12 Cutting edge angle Insert relief angle Toolholder length Insert size A B C D (mm) R S 90° 75° 90° 45° AN LF L L B 5° Positive A 32 J 110 R 200 C 7° Positive B 40 JX 120 S 250 T C D 15° Positive C 50 K 125 T 300 L L E 20° Positive D 60 L 140 U 350 E F G H N 0° Negative E 70 M 150 V 400 D L 60° 90° 90° P 11° Positive F 80 N 160 W 450 L V G 90 P 170 Y 500 107.5° H 100 Q 180 X Special J K L N 93° 75° 95° 63° 95° P R S T 75° 45° 60° 117.5° U V W Y 93° 60° 85° 72.5° • Specification may change without any prior notice. • Due to the installation size contrains on the machine, the toolholder length of some products may not match with the symbol. D2