APMX2 DMIN APMX Parting-Off Grooving & Grooving Tool Holders GND Type Tips for Necking Notes for Undercutting Recommended Chipbreaker: RN Distance between Workpiece and Necking Edge Width Depth of Necking Distance between Workpiece CW (mm) APMX (mm) and Necking APMX2 (mm) 2,0 1,50 0,646 3,0 2,00 0,793 4,0 2,50 0,939 5,0 3,00 1,086 6,0 3,50 1,232 APMX2 The recommended cutting conditions for necking are the same as grooving with RN type chipbreaker and edge width. To prevent interference with the work material, do not use the holder for less than the minimum cutting diameter (DMIN) as specified for GNGN type holders. Chip Shape Work Material: 34CrMo4 Holder: GNDN R2020K 325-020 Insert: GCM N3015 RN Cutting Conditions: vc = 100m/min, f = 0,1mm/rev Depth of Necking = 1,0mm, wet F11