MagicDrill DRX  DRX Recommended Cutting Conditions (Coolant) Recommended Insert Grades (Cutting Speed Vc:m/min) Drill type Workpiece MEGACOAT Carbide Drill Dia. Material PR1230 PR1225 PR1210 GW15 φDc 2D~3D 4D 5D GM (mm) SM GM SM f (mm/rev) GH GM GH SM GM GH SM GM GH SM φ12~φ15 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 ☆ ★ φ15.5~φ18 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 Steel 120-240 120-240 φ18.5~φ26 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 φ26.5~φ60 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 φ12~φ15 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 Carbon Steel ★ ☆ φ15.5~φ18 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 0.05~0.08 100-180 100-180 φ18.5~φ26 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 φ26.5~φ60 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 φ12~φ15 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 Alloy Steel ★ ☆ φ15.5~φ18 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 0.05~0.08 100-160 100-160 φ18.5~φ26 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 φ26.5~φ60 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 φ12~φ15 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 Mold Steel ★ ☆ φ15.5~φ18 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 80-150 80-150 φ18.5~φ26 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 φ26.5~φ60 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 φ12~φ15 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 ☆ ★ φ15.5~φ18 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 Steel 70-140 70-140 φ18.5~φ26 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 (Austenitic related) φ26.5~φ60 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 φ12~φ15 0.08~0.14 - - 0.06~0.12 - - 0.04~0.10 - - K Gray Cast ★ φ15.5~φ18 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - Iron 100-150 φ18.5~φ26 0.08~0.20 - - 0.08~0.18 - - 0.06~0.14 - - φ26.5~φ60 0.08~0.20 - - 0.08~0.18 - - 0.06~0.14 - - φ12~φ15 0.08~0.12 - - 0.06~0.10 - - 0.04~0.08 - - Nodular ★ φ15.5~φ18 0.08~0.16 - - 0.08~0.14 - - 0.06~0.10 - - Drilling Cast Iron 80-120 φ18.5~φ26 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - φ26.5~φ60 0.08~0.18 - - 0.08~0.16 - - 0.06~0.12 - - φ12~φ15 - - 0.06~0.12 - - 0.05~0.10 - - 0.04~0.08 Non-ferrous ★ φ15.5~φ18 - - 0.08~0.14 - - 0.06~0.12 - - 0.05~0.10 DRA Metals 200-600 φ18.5~φ26 - - 0.08~0.16 - - 0.06~0.14 - - 0.05~0.12 φ26.5~φ60 - - 0.08~0.20 - - 0.08~0.16 - - 0.07~0.14 DRC φ12~φ15 - - 0.05~0.08 - - 0.04~0.07 - - 0.04~0.06 Titanium ★ φ15.5~φ18 - - 0.05~0.08 - - 0.04~0.07 - - 0.04~0.06 DRX Alloys 40-70 φ18.5~φ26 - - 0.06~0.10 - - 0.06~0.08 - - 0.05~0.07 φ26.5~φ60 - - 0.06~0.10 - - 0.06~0.08 - - 0.05~0.07 DRS ★ : 1st Recommendation ☆ : 2nd Recommendation · Apply a sufficient amount of coolant. DRZ  Cutting Conditions by Application DRW Applications Plain Surface Slant Surface Half Cylindrical Hole Expansion Concave Surface Cored Hole* Stacked Plates Fine Micro Shape of Workpiece Cutting Speed (m/min) 120 120 120 120 120 120 Not Available DRX f (mm/rev) 0.1 0.05 0.05 0.05 Concave Surface 0.05 0.05 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×Dc or less Less than corner radius 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×Dc) of drill diameter (φDc). K48