Grooving and Cut-Off TopGroove™ Boring Bars Steel shank with through coolant. Right-hand toolholder shown. „A-NNT hex/ gage clamp clamp Torx order number catalogue number D D min L1 F CS insert clamp screw screw Plus right hand 3641644 A12MNNTOR2 12 18,5 150 11 1/16-27 NPT NG2L CM147 MS1200 — 2.5 mm 3641643 A16MNNTOR2 16 22,0 150 11 1/8-27 NPT N.2L CM75 MS1200 — 2.5 mm 3641645 A20QNNTOR2 20 26,0 180 13 1/8-27 NPT N.2L CM75 MS1200 — 2.5 mm 3641651 A25RNNTOR2 25 34,0 200 17 1/4-18 NPT N.2L CM75 MS1200 — 2.5 mm 3641622 A25RNNTOR3 25 34,0 200 17 1/8 - 27 NPT N.3L CM73LP — MS2111 25 IP 3641646 A32SNNTOR3 32 44,0 250 22 1/4-18 NPT N.3L CM73LP — MS2111 25 IP 3641653 A40TNNTOR3 40 54,0 300 27 1/4-18 NPT N.3L CM73LP — MS2111 25 IP 3641654 A40TNNTOR4 40 54,0 300 27 1/4-18 NPT N.4L CM73LP — MS2111 25 IP 3641661 A50UNNTOR4 50 70,0 350 35 1/4-18 NPT N.4L CM73LP — MS2111 25 IP left hand 3641655 A12MNNTOL2 12 18,5 150 11 1/16-27 NPT NG2R CM146 MS1200 — 2.5 mm 3641649 A16MNNTOL2 16 22,0 150 11 1/8-27 NPT N.2R CM74 MS1200 — 2.5 mm 3641652 A20QNNTOL2 20 26,0 180 13 1/8-27 NPT N.2R CM74 MS1200 — 2.5 mm 3641657 A25RNNTOL2 25 34,0 200 17 1/4-18 NPT N.2R CM74 MS1200 — 2.5 mm 3641650 A25RNNTOL3 25 34,0 200 17 1/4-18 NPT N.3R CM72LP — MS2111 25 IP 3641656 A32SNNTOL3 32 44,0 250 22 1/4-18 NPT N.3R CM72LP — MS2111 25 IP 3641659 A40TNNTOL3 40 54,0 300 27 1/4-18 NPT N.3R CM72LP — MS2111 25 IP 3641663 A40TNNTOL4 40 54,0 300 27 1/4-18 NPT N.4R CM72LP — MS2111 25 IP 3641690 A50UNNTOL4 50 70,0 350 35 1/4-18 NPT N.4R CM72LP — MS2111 25 IP NOTE: Minimum bore capability varies with depth of groove. See pages E86–E87 for details. F dimension measured over sharp point of insert. E78 widia.com