MagicDrill DRX Toolholder DRX DRX recommended cutting conditions (Coolant) Recommended insert grades (Cutting speed Vc: m/min) Toolholder type Workpiecematerial MEGACOAT Carbide Drill dia.PR1230PR1225PR1210GW15DC(mm)2D~3D 4D 5D GMGH SM GM SM f (mm/rev)GMGHSMGMGHSM GM GH SM ø12~ø15 0.06~0.10 0.06~0.10 0.04~0.10 0.05~0.08 0.05~0.08 0.04~0.08 0.04~0.07 0.04~0.07 0.04~0.08 Low carbon steel ø15.5~ø18 0.06~0.12 0.06~0.12 0.06~0.12 0.05~0.10 0.05~0.10 0.05~0.10 0.05~0.08 0.05~0.08 0.04~0.09 120-240 120-240 ø18.5~ø26 0.08~0.14 0.08~0.14 0.06~0.14 0.06~0.12 0.08~0.12 0.05~0.12 0.06~0.10 0.06~0.10 0.04~0.10 ø26.5~ø60 0.08~0.14 0.08~0.14 0.06~0.14 0.06~0.12 0.08~0.12 0.05~0.12 0.06~0.10 0.06~0.10 0.04~0.10 ø12~ø15 0.04~0.14 0.04~0.14 0.04~0.10 0.04~0.10 0.04~0.10 0.04~0.08 0.04~0.08 0.04~0.08 0.04~0.07 ø15.5~ø18 0.06~0.16 0.06~0.16 0.06~0.12 0.05~0.12 0.05~0.12 0.05~0.10 0.05~0.10 0.05~0.10 0.05~0.08 Carbon steel 100-180 100-180 ø18.5~ø26 0.08~0.20 0.08~0.20 0.06~0.14 0.07~0.16 0.07~0.16 0.05~0.12 0.06~0.12 0.06~0.12 0.05~0.10 ø26.5~ø60 0.08~0.20 0.08~0.20 0.06~0.14 0.07~0.16 0.07~0.16 0.05~0.12 0.06~0.12 0.06~0.12 0.05~0.10 ø12~ø15 0.04~0.14 0.04~0.14 0.04~0.10 0.04~0.10 0.04~0.10 0.04~0.08 0.04~0.08 0.04~0.08 0.04~0.07 ø15.5~ø18 0.06~0.16 0.06~0.16 0.06~0.12 0.05~0.12 0.05~0.12 0.05~0.10 0.05~0.10 0.05~0.10 0.05~0.08 Alloy steel 100-160 100-160 ø18.5~ø26 0.08~0.20 0.08~0.20 0.06~0.14 0.07~0.16 0.07~0.16 0.05~0.12 0.06~0.12 0.06~0.12 0.05~0.10 ø26.5~ø60 0.08~0.20 0.08~0.20 0.06~0.14 0.07~0.16 0.07~0.16 0.05~0.12 0.06~0.12 0.06~0.12 0.05~0.10 ø12~ø15 0.04~0.08 0.04~0.08 0.04~0.08 0.04~0.07 0.04~0.07 0.04~0.07 0.04~0.06 0.04~0.06 0.04~0.06 ø15.5~ø18 0.06~0.12 0.06~0.12 0.06~0.10 0.05~0.10 0.05~0.10 0.05~0.08 0.04~0.08 0.04~0.08 0.04~0.07 Mold steel 80-150 80-150 ø18.5~ø26 0.08~0.15 0.08~0.15 0.06~0.12 0.06~0.12 0.06~0.12 0.06~0.10 0.05~0.10 0.05~0.10 0.05~0.08 ø26.5~ø60 0.08~0.15 0.08~0.15 0.06~0.12 0.06~0.12 0.06~0.12 0.06~0.10 0.05~0.10 0.05~0.10 0.05~0.08 ø12~ø15 0.06~0.10 0.06~0.10 0.04~0.10 0.05~0.08 0.05~0.08 0.04~0.08 0.04~0.07 0.04~0.08 0.04~0.08 Stainless steel ø15.5~ø18 0.06~0.10 0.06~0.10 0.06~0.12 0.05~0.08 0.05~0.08 0.05~0.11 0.04~0.07 0.04~0.07 0.04~0.10 (Austenitic related) 70-140 70-140 ø18.5~ø26 0.08~0.12 0.08~0.12 0.06~0.14 0.07~0.10 0.07~0.10 0.06~0.12 0.07~0.10 0.07~0.10 0.06~0.12 ø26.5~ø60 0.08~0.12 0.08~0.12 0.06~0.14 0.07~0.10 0.07~0.10 0.06~0.12 0.07~0.10 0.07~0.10 0.06~0.12 ø12~ø15 0.08~0.14 - - 0.06~0.12 - - 0.04~0.10 - - K Gray cast iron ø15.5~ø18 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - 100-150 ø18.5~ø26 0.08~0.20 - - 0.08~0.18 - - 0.06~0.14 - - ø26.5~ø60 0.08~0.20 - - 0.08~0.18 - - 0.06~0.14 - - ø12~ø15 0.08~0.12 - - 0.06~0.10 - - 0.04~0.08 - - ø15.5~ø18 0.08~0.16 - - 0.08~0.14 - - 0.06~0.10 - - Nodular cast iron 80-120 ø18.5~ø26 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - ø26.5~ø60 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - ø12~ø15 - - 0.06~0.12 - - 0.05~0.10 - - 0.04~0.08 Non-ferrous ø15.5~ø18 - - 0.08~0.14 - - 0.06~0.12 - - 0.05~0.10 metals 200-600 ø18.5~ø26 - - 0.08~0.16 - - 0.06~0.14 - - 0.05~0.12 ø26.5~ø60 - - 0.08~0.20 - - 0.08~0.16 - - 0.07~0.14 ø12~ø15 - - 0.05~0.08 - - 0.04~0.07 - - 0.04~0.06 ø15.5~ø18 - - 0.05~0.08 - - 0.04~0.07 - - 0.04~0.06 Titanium alloys 40-70 ø18.5~ø26 - - 0.06~0.10 - - 0.06~0.08 - - 0.05~0.07 ø26.5~ø60 - - 0.06~0.10 - - 0.06~0.08 - - 0.05~0.07 · Apply a sufficient amount of coolant. : 1st recommendation : 2nd recommendation Cutting conditions by application Applications Plain surface Slant surface Half cylindrical Hole expansion Concave surface Cored hole* Stacked plates Shape of workpiece Cutting speed Vc (m/min) 120 120 120 120 120 120 Not available DRX f (mm/rev) Concave surface0.10.050.050.050.050.05 Not available Continuous Part 0.1 Coolant (Internal) Yes Yes Yes Yes Yes Yes Not available * Cutting width (Torus-shaped part) when drilling cored hole. Drill type 2D~3D 4D 5D Cutting width (Torus-shaped part) 0.1 x DC or less Corner radius or less Not recommended Max. depth for drilling with external coolant In case of using external coolant system, chip evacuation will be bad. Therefore ap should be measured within 1.5 times (1.5 x DC) of drill diameter (DC). K92 Drilling