GMM / GMGA / FGG 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) Cermet CVD PVD Coated Carbide Coated Carbide Carbide Insert Description TN90 CR9025 PR915 PR930 KW10 W rε M L H Handed Insert shows Right-hand M W±0.02 L rH GMGA 6020-300R 6.0 3.0 4.3 20 4.3 G34 G35 Sharp-Cutting Oriented / Precision Class H Full-R / Copying M W±0.02 L rH GMGA 8030-400R 8.0 4.0 6.0 30 5.5 G34 G G62 Sharp-Cutting Oriented / Precision Class H Full-R / Copying W±0.05 2゜ M rH 2゜ L GMM 3014-04 3.0 0.4 2.3 14 4.3 Grooving H Chip Control Oriented / M Class M rH W±0.05 GMM 3014-15R 3.0 1.5 2.3 14 4.3 G36 L Chip Control Oriented / M Class H Full-R / Copying M rH W±0.05 GMM 3014-15RU 3.0 1.5 2.3 14 4.3 L H Chip Control Oriented Undercutting R L R L R L R L R L rH W±0.02 2゜ M 2゜ FGG & 3020-02 3.0 0.2 2.3 G36 L 4020-04 4.0 0.4 3.3 20 4.3 H 5020-04 5.0 0.4 4.2 Chip Control Oriented / Precision Class Face Grooving Recommended Cutting Conditions G105 Features of Chipbreaker Edge Preparation Series Insert Features Chamfer + Honed Chamfer + Honed Corner-R(rε) = 0.05 Sharp Corner GMM-MW Excellent chip evacuation at Edge Prep. Grooving, Turning, Cut-off. GMG-MG Low cutting force with ground chipbreaker. MT Chipbreaker CR9025 / PR915 PR930 / KW10 Chamfer + Honed Sharp Edge GMG-MS Grooving / Turning / Cut-off Corner-R(rε) = 0.2-0.3 Corner-R(rε) = 0.2-0.3 GMM-MS operations are minimum cutting force Edge Prep. at Positive Edge. Small corner-R(rε) and minimize the GMM-MT core which remains in the center of the face. TK Chipbreaker CR9025 / PR915 PR930 / KW10 Honed Sharp Edge GMM-TK Large corner-R(rε) and stable Corner-R(rε) = 0.05 Sharp Corner performance at cut-off. Edge Prep. GMM-NB Flat rake face and non-chipbreaker. It works well for brass Without Chipbreaker (-NB) CR9025 PR930 / KW10 · Sharp Edge Spec. can reduce cutting force by 40% less than that of chamfer edge. : Std. Item Inserts are : Deleted from the next catalogue sold in 10 piece boxes. G31