ISO NAMENCLATURE FOR EXTERNAL TOOLHOLDER d d ( mm) h 06 08 10 12 16 20 25 32 o L 1 in mm b height of cutting edge " h" in mm Width of shank " b " in mm A B C D E F G H J K L N P Q R S T U V W Y = 32 = 40 = 50 = 60 = 70 = 80 = 90 100 = 110 = 125 = 140 150 = 160 = 170 = 180 = 200 = 250 = 300 = 350 = 400 = 450 = 500 F: straight style S : single positioning D : with shim and positive rake angle d ( mm) (mm) 06 5/32 3.96 03 09 7/32 5.55 05 11 1 /4 6.35 06 16 3/8 9.52 09 22 1/2 12.7 12 27 5/8 15.8 15 33 3 /4 19.0 19 44 1 25.4 25 (mm) (inch) 25 25 M 16 F Nose height Width of shank Length of toolholder Length of cutting edge Defined by the manufacturer www. harlingentools . com 66