Solid Carbide Drills Solid Carbide Drills Deep Hole Drilling Application Guide 㾀ⳣ⽴㍘䚷㒖ⓦ 1 Short drill for piloting Coolant : On/Rႇ DP Series 2×D 2 Long drill into pilot hole Coolant : 2ႇ DP Series (10xD ~ 20xD) n = 100~500rpm 1.5×D Vf > 500mm/min 3 Spotting Coolant : On DP Series (10xD ~ 20xD) Vc = 100% 3×D Vf = 50% 4 Deep Hole drilling Coolant : On DP Series (10xD ~ 20xD) Vc = 100% Vf = 100% 5 Retracting Coolant : 2ႇ DP Series (10xD ~ 20xD) n = 100~500rpm Vf > 500mm/min SB063