Multi-Function / Grooving (Cut-off)  GMM / GMG (Will be switched to GDM / GDG G19~G20) Classification of usage P Carbon steel / Alloy steel M Stainless Steel Applicable Toolholders K Cast Iron : Continuous-Light Interruption / 1st Choice N Non-ferrous Metals Ref. to Page for : Continuous-Light Interruption / 2nd Choice S Titanium Alloys : Continuous / 1st Choice : Continuous / 2nd Choice H Hard materials (~40HRC)   Hard materials (40HRC~) Dimension (mm) CVD PVD Coated Cermet Coated Carbide Carbide Carbide Insert Description TN90 CR9025 PR915 PR930 PR905 KW10 W rε M L H GMM 2420-020MW 2.4 0.2 1.9       3020-020MW 3.0 0.2 2.3       3020-040MW 0.4       Shows GMM2420-02 4020-020MW 0.2       4020-040MW 4.0 0.4 3.3 20 4.3       G34 M 2゜ W±0.05 4020-080MW 0.8       G35 G 2゜ 5020-040MW 0.4       L rH 5.0 4.2 H 5020-080MW 0.8       6020-040MW 6.0 0.4 5.2       6020-080MW 0.8       Chip Control Oriented / M Class 8030-080MW 8.0 0.8 6.0 30 5.5      G34,G62 Grooving rH GMM 3020-020MS 3.0 0.2 2.3      W±0.05 2゜ M 3020-040MS 0.4      G34 2゜ 4020-040MS 4.0 3.3 20 4.3      L G35 H 5020-040MS 5.0 0.4 4.2      External Sharp-Cutting Oriented / M Class 6020-040MS 6.0 5.2    GMG 3020-000MS 0.0     Internal 3020-020MS 3.0 0.2 2.3 20 4.3      3020-040MS 0.4      Face 2゜ rH 4020-020MS 0.2      W±0.02 M 4020-040MS 4.0 0.4 3.3 20 4.3      G34 2゜ L 4020-080MS 0.8      G35 H 5020-040MS 0.4      5020-080MS 5.0 0.8 4.2 20 4.3     6020-040MS 6.0 0.4 5.2 20 4.3    Sharp-Cutting Oriented / Precision Class 6020-080MS 0.8    GMG 2520-030MG 2.5 2.0       2゜ rH 3020-030MG 3.0 0.3 2.3       W±0.03 M 3520-030MG 3.5 2.8 20 4.3       G34 2゜ L 4020-040MG 4.0 3.3       G35 15° H 5020-040MG 5.0 0.4 4.2       6020-040MG 6.0 5.2      Sharp-Cutting Oriented / Precision Class 8030-050MG 8.0 0.5 6.0 30 5.5      G34,G62 Ground Chipbreaker rH GMM 3020-150R 3.0 1.5 2.3       W±0.05 M 4020-200R 4.0 2.0 3.3 20 4.3       G34 L 5020-250R 5.0 2.5 4.2       G35 Chip Control Oriented / M Class H 6020-300R 6.0 3.0 5.2       Full-R / Copying 2゜ rH GMG 3020-150R 3.0 1.5 2.3     W±0.02 M 4020-200R 4.0 2.0 3.3 20 4.3     G34 2゜ L 5020-250R 5.0 2.5 4.2    G35 Sharp-Cutting Oriented / Precision Class H 6020-300R 6.0 3.0 5.2    Full-R / Copying rH GMG 3020-150RU 3.0 1.5 2.3    W±0.02 2゜ M G34 2゜ 4020-200RU 4.0 2.0 3.3 20 4.3    G35 L G37 H 5020-250RU 5.0 2.5 4.2 Undercutting    Chip Control Oriented Recommended Cutting Conditions G105 Inserts are  : Std. Item G30 sold in 10 piece boxes.  : Deleted from the next catalogue