External grooving Blade and toolholder KGDS-S GMM/GMN/GMR Carbon steel / Alloy steel P Q O P Stainless steel Q P M Cast iron Q K Non-ferrous metals Q N Titanium alloy Q S Hard materials (~40 HRC) O N H Hard materials (40 HRC ~) Cermet Applicable toolholder Dimension (mm) Angle (°) Tolerance Carbide No. of edges CVD Insert Description PVD - - CW CW CW S RE INSL PSIRR/L min. max. CR9025 PR915 PR930 KW10 TN90 0 U U GMM 1520-MT 2 1.5 4.3 0.05 20 - 0.05 + 0.05 U RE 0 U U GMM 2020-MT 2 2 4.3 20 - 0.05 + 0.05 2° CW±0.05 0.05 U U 2° INSL RE 0 U U S GMM 2520-MT 2 2.5 4.3 0.05 20 - 0.05 + 0.05 U G Sharp cutting oriented 0 U U GMM 3020-MT 2 3 4.3 0.05 20 - 0.05 + 0.05 U U RE GMM 1520-NB 2 1.5 4.3 0 20 - 0.05 + 0.05 U U 2° CW±0.05 GMM 2020-NB 2 2 4.3 0 20 - 0.05 + 0.05 U U 2° INSL RE S GMM 2520-NB 2 2.5 4.3 0 20 - 0.05 + 0.05 U Grooving Sharp cutting oriented / Without Chipbreaker GMM 3020-NB 2 3 4.3 0 20 - 0.05 + 0.05 U 2゜ CW±0.05 GMM 2020-TK 2 2.0 4.3 0.2 20 - 0.05 + 0.05 U U U G45-G47 2゜ RE INSL GMM 2520-TK 2 2.5 4.3 0.2 20 - 0.05 + 0.05 S U U U Deep Grooving / Cut-off GMM 3020-TK 2 3.0 4.3 0.25 20 - 0.05 + 0.05 U U U U Stability Oriented CW±0.05 GMN 2-TK 1 2 4.3 0.2 20 - 0.05 + 0.05 2° U U U 2° INSL RE GMN 3-TK 1 3 4.3 0.25 20 - 0.05 + 0.05 U U U U S 1-edge / Stability GMN 4-TK 1 4 4.3 0.3 20 - 0.05 + 0.05 U U U U oriented GMN2.2 GMN 2.2 1 2.2 4.3 0.17 20 - 0.05 + 0.05 U U U U GMN 3 1 3 4.3 0.2 20 - 0.05 + 0.05 U U U U CW±0.05 2° GMN 4 1 4 4.3 0.25 20 - 0.05 + 0.05 U U U U 2° RE INSL GMN 5 1 5 4.3 0.8 20 - 0.05 + 0.05 U U U S 1-edge GMN 6 1 6 4.3 0.8 20 - 0.05 + 0.05 U U U R L R L R L R L R L 0 U U GMM 1520&-MT-15D 2 1.5 4.3 20 15 - 0.05 + 0.05 0.05 U PSIRR 0 U U U GMM 2020&-MT-15D 2 2 4.3 20 15 - 0.05 + 0.05 CW±0.05 2° 0.05 U U 2° INSL RE 0 U S GMM 2520&-MT-15D 2 2.5 4.3 20 15 - 0.05 + 0.05 Sharp cutting oriented 0.05 U 0 U U U U GMM 3020&-MT-15D 2 3 4.3 20 15 - 0.05 + 0.05 0.05 U U PSIRR GMM 2020R-TK-8D 2 2 4.3 0.2 20 8 - 0.05 + 0.05 U U U CW±0.05 2° RE GMM 2520R-TK-8D 2 2.5 4.3 0.2 20 8 - 0.05 + 0.05 2° INSL U G45-G47 S Stability oriented GMM 3020R-TK-8D 2 3 4.3 0.25 20 8 - 0.05 + 0.05 U U U PSIRR CW±0.05 GMR 2-TK-8D 1 2 4.3 0.2 20 8 - 0.05 + 0.05 U U 2° 2° INSL RE GMR 3-TK-8D 1 3 4.3 0.25 20 8 - 0.05 + 0.05 U U U S 1-edge / Stability GMR 4-TK-8D 1 4 4.3 0.3 20 8 - 0.05 + 0.05 U U U oriented GMR2.2-8D / 15D PSIR GM& 2.2-8D 1 2.2 4.3 0.17 20 8 - 0.05 + 0.05 U U U U U R CW±0.05 2° GM& 2.2-15D 1 2.2 4.3 0 20 15 - 0.05 + 0.05 U U U U 2° RE INSL GM& 3-4D 1 3 4.3 0.2 20 4 - 0.05 + 0.05 U U U U U U S 1-edge / Sharp cutting oriented GM& 4-4D 1 4 4.3 0.25 20 4 - 0.05 + 0.05 U U U Handed insert shows Right-hand N : Standard item R : Right hand only L : Left hand only U : Check availability Recommended cutting conditions: G121 G43