MagicDrill DRZ Toolholder DRZ DRZ recommended cutting conditions (Coolant) Recommended insert grades ( Vc: m/min) Drill type (Drilling depth) MEGACOAT Carbide Workpiece material PR1230 PR1225 PR1210 KW10 DC(mm) 2D 3D 4D 5D Standard Standard Standard Standard SP SP SPSUSU f (mm/rev) ø13~ø15.5 0.06~0.10 0.06~0.10 0.04~0.08 - Low carbon steel 120~220 120~220 - - ø16~ø26.5ø27~ø50 0.08~0.15 0.08~0.15 0.06~0.12 -0.08~0.180.08~0.150.06~0.120.05~0.09 ø50~ 0.08~0.18 0.08~0.15 0.06~0.12 - ø13~ø15.5 0.06~0.10 0.06~0.10 0.04~0.08 - Carbon steel 100~160 100~160 - - ø16~ø26.5ø27~ø50 0.08~0.15 0.08~0.15 0.06~0.12 -0.08~0.180.08~0.150.06~0.120.05~0.09 ø50~ 0.08~0.18 0.08~0.15 0.06~0.12 - ø13~ø15.5 0.06~0.10 0.06~0.10 0.04~0.08 - Alloy steel 80~140 80~140 - - ø16~ø26.5ø27~ø50 0.08~0.15 0.08~0.15 0.06~0.12 -0.08~0.180.08~0.150.06~0.120.05~0.09 ø50~ 0.08~0.18 0.08~0.15 0.06~0.12 - ø13~ø15.5 0.04~0.08 0.04~0.08 0.03~0.07 - Mold steel 70~130 70~130 - - ø16~ø26.5ø27~ø50 0.08~0.12 0.06~0.10 0.06~0.08 -0.08~0.150.06~0.120.06~0.100.04~0.07 ø50~ 0.08~0.15 0.06~0.12 0.06~0.10 - ø13~ø15.5 0.04~0.08 0.04~0.08 0.03~0.06 - Stainless steel(Austenitic related)60~120 60~120 - - ø16~ø26.5ø27~ø50 0.06~0.10 0.06~0.10 0.04~0.08 -0.06~0.100.06~0.120.04~0.100.04~0.07 ø50~ 0.06~0.12 0.06~0.12 0.04~0.10 - ø13~ø15.5 0.08~0.12 0.08~0.10 0.06~0.08 - Gray cast iron - - ø16~ø26.5100~150100~120ø27~ø500.10~0.18 0.10~0.15 0.08~0.12 -0.10~0.200.10~0.180.08~0.150.06~0.10ø50~0.10~0.200.10~0.180.08~0.15-K ø13~ø15.5 0.08~0.12 0.08~0.10 0.06~0.08 - Nodular cast iron - - ø16~ø26.5 0.10~0.18 0.10~0.15 0.08~0.12 -80~12080~100ø27~ø500.10~0.200.10~0.180.08~0.150.06~0.10 ø50~ 0.10~0.20 0.10~0.18 0.08~0.15 - ø13~ø15.5 0.06~0.12 0.06~0.10 0.04~0.08 - Non-ferrous metals - - - ø16~ø26.5200~600ø27~ø500.08~0.18 0.08~0.15 0.06~0.15 -0.08~0.200.08~0.180.06~0.150.05~0.10 ø50~ 0.08~0.20 0.08~0.18 0.06~0.15 - ø13~ø15.5 0.05~0.06 0.05~0.06 0.05~0.06 - Titanium alloys - - - ø16~ø26.5 0.05~0.07 0.05~0.07 0.05~0.07 -40~70ø27~ø500.06~0.080.06~0.080.06~0.080.04~0.05 ø50~ 0.06~0.08 0.06~0.08 0.06~0.08 - · Apply a sufficient amount of coolant. : 1st recommendation : 2nd recommendation Cutting conditions by application [Workpiece material: S50C] Applications Plain surface Slant surface Half cylindrical Hole expansion Concave surface Cored hole Stacked plates Shape of workpiece Cutting speedVc (m/min) 120 120 120 120 120 120 Not available DRZ Concave surface0.05 f (mm/rev) 0.1 0.05 0.05 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. (Same as when using a boring bar). Drill type 2D ~ 3D 4D ~ 5D e.g.) In case of drilling using DRZ3090-10 (3 x DC) 1. For milling, pre-drilled hole should be cut ø24 (ø30 - 0.1 x 30 x 2) or bigger Cutting width (Torus-shaped part) 0.1 x DC or less Not recommended 2. For turning, ap should be set ap = 3mm (0.1 x 30) or under 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). K77 Drilling