45° APMX2 DMIN Tools Grooving SEC-Grooving Tools SEC-Grooving Tools GND Type GND Type SEC-Grooving Tool Holders GND Type Key Points for Necking Precautions for Necking Recommended Chipbreaker RN Distance from Work Material to Necking Depth Width of Cut Necking Depth Distance from Work Material to Necking Depth CW (mm) APMX (mm) APMX2 (mm) 2.0 1.5 0.64 APMX 3.0 2.0 0.79 F4.03.01.29 5.0 3.5 1.44 6.0 4.0 1.59 APMX2 · For necking, these conditions are recommended for each width of cut when grooving with RN type chipbreakers. · To prevent interference with the work material, the work diameter for each GNDN type holder should be set to the minimum machining diameter (DMIN) or less. Chip Shape F Grooving Tool 1.0mm 50mm Work Material : SCM435 Groove Width: 3.0mm Holder : GNDN R2020K-325-020 Insert: GCMN3015-RN Cutting Conditions: vc=100m/min, f =0.1mm/rev Undercut Depth = 1.0mm Wet F19