Internal Grooving Toolholders  KIGM-V (Will be switched to KGDI G58~G59) IA Coolant Hole (I6) ID F T L2 H L1  Right-hand shown Exit hole of coolant  Toolholder Dimensions Std. Min. Dimension (mm) Edge Width Spare Parts Bore Dia. W (mm) Clamp Screw Wrench Description RL φA φD H L1 L2 F T MIN. MAX. G KIGM& 2016B-3V  20 16 15 150 25 11.5 5.5 GS-50 - LW-3 - 2520B-3V  25 20 18 180 32 14.5 6.0 3.0 3.0 3225B-3V  32 25 23 200 40 19 8.0 - SB-5TR - LTW-20 3225B-4V  32 25 23 200 40 19 8.5 4.0 5.0 - SB-5TR - LTW-20 4032B-4V  40 32 29 220 50 23.5 11.0 Grooving · Dimension T shows available grooving depth.  Applicable Inserts P Carbon steel / Alloy steel Classification of usage (mm) M Stainless Steel Description L H K Cast Iron : Continuous-Light Interruption / GMM3015…V□ 15.5 N Non-ferrous Metals 1st Choice External S Titanium Alloys : Continuous-Light Interruption / GMM4020…V□ 4.3 2nd Choice 20 H Hard materials (~40HRC)  ● ●: Continuous / 1st Choice Internal GMM5020…V□ Hard materials (40HRC~) : Continuous / 2nd Choice Face Dimension Cermet CVD Coated Carbide PVD Coated Carbide (mm) Carbide Insert Description CR9025 Applicable TN90 PR915 PR930 PR905 KW10 Toolholders W rε M W±0.05 2° rH KIGM& 2016B-3V M GMM 3015-040V 3.0 0.4 2.3       2520B-3V 2° L 3225B-3V H 4020-040V 4.0 0.4 3.3       KIGM& 3225B-4V Chip Control Oriented 18° 18° 4032B-4V M Class 5020-080V 5.0 0.8 4.2       rH KIGM& 2016B-3V GMM 3015-150VR 3.0 1.5 2.3      2520B-3V 3225B-3V Chip Control Oriented 18° 4020-200VR 4.0 2.0 3.3     KIGM& 3225B-4V M Class 18° 4032B-4V Full-R / Copying 5020-250VR 5.0 2.5 4.2   □  · It is not recommended to use this for KIGM-V Internal Grooving Toolholders against Recommended Cutting Conditions G105 GMM...V / GMM...VR which the front relief angle is 18°, because the relief angle of  the insert used for GMM4020-04 toolholder is 10°. Inserts are  : Check Availability G60 sold in 10 piece boxes. □ : Deleted from the next catalogue