For Tool Holders, Internal Machining

S Type of boring bar  32 Shank Diameter T Lenght of Shank P Type of Fixation C Insert Shape  L Tool Holder Shape  N Clearance Angle of the Insert R Direction of Cut  12 Lenght of the Cutting Edge Identification letter  Material used for main body  Features of design S Solid steel None A With internal coolant supply B With vibration damping  D With vibration damping and internal coolant supply C Hard metal and steel head none E With internal coolant supply F With vibration damping  G With vibration damping and internal coolant supply H Heavy Metal *)  none J With internal coolant supply *) Sintered alloys with increased damping effect, e.g. tungsten copper. 08 10 12 16 20 25 32 40 50 Symbol l1 l1 mm. A 32 B 40 C 50 D 60 E 70 F 80 G 90 H 100 J 110 K 125 L 140 M 150 N 160 P 170 Q 180 R 200 S 250 T 300 U 350 V 400 W 450 X other  lenght Y 500 C Clamped from above  M Clamped from above and over a hole  P Clamped over a hole  S Fixation by screw through a hole  C 80° D 55° R -- S 90° T 60° V 35° W 80° F 90° K 75° L 95° S 45° U 93° Q 107° B C N P O Clearance angle requiring special indications L Boring bar suitable for operation to the left only R Boring bar suitable for operation to the right only C E R S T V W