ISO NAMENCLATURE FOR BORING BAR d £> K B 5° j ^ m d ( mm) F 06 08 10 12 16 20 25 32 C U lfb D 15 D : lncrease offset by 1 . Omm E : lncrease offset by 2.0 mm L 6! E X : Reverse boring Q 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) J N N 0° 62° p 11°jm S 45 F Style & lead angle (inch) C R 16 D Clearance angle Hand of Bar Length of cutting edge Defined by the manufacturer www. harlingentools . com 88