Indexable Drill Inserts & HoldersHolemaking Indexable Drill Inserts & Holders DSP Recommended Cutting Conditions DSP Series (2×D, 3×D) Feed Rate (mm/rev) Work Material Hardness Vc(m/min)SPMG05 SPMG06 SPMG07 SPMG09 SPMG11 Ø13-Ø15 Ø16-Ø21 Ø22-Ø27 Ø28-Ø33 Ø34-Ø41 Mild Steel (<180HB) 220~350 0.04~0.08 0.05~0.10 0.06~0.13 0.07~0.15 0.08~0.18 P Cabon Steel (180~280HB) 100~150 0.04~0.08 0.05~0.09 0.06~0.12 0.07~0.13 0.08~0.15 Alloy Steel (280~350HB) 80~140 0.04~0.07 0.05~0.08 0.05~0.09 0.06~0.12 0.07~0.14 M Stainless Steel (<200HB) 80~180 0.04~0.08 0.05~0.09 0.05~0.10 0.06~0.12 0.07~0.14 Cast lron (<350Mpa) 150~250 0.05~0.09 0.07~0.12 0.08~0.15 0.09~0.17 0.12~0.20 K Ductile Cast lron (<450Mpa) 100~160 0.05~0.08 0.06~0.11 0.07~0.13 0.08~0.15 0.10~0.18 Aluminum <12% Si - 300~400 0.05~0.11 0.07~0.13 0.08~0.15 0.09~0.20 0.12~0.25 N Aluminum >12% Si - 200~330 0.04~0.08 0.05~0.10 0.06~0.13 0.07~0.15 0.08~0.18 S Heat Resistant Alloy - 30~60 0.02~0.04 0.03~0.05 0.03~0.05 0.04~0.06 0.05~0.08 H Hardened Material 40~60HRC 30~60 0.02~0.04 0.03~0.05 0.03~0.05 0.04~0.06 0.05~0.08 Apply for 4×D reduce 10%, 5×D reduce 15%. B062