Drill Selection Guide Description Drilling Depth (L/D) Coating Coolant Carbon Steel, Tempered Steel Hardened Steel Stainless Steel Ti Alloy Heat-resistant Steels Cast Iron Ductile Cast Iron Aluminum Alloy Copper Alloy Composite Ref. Page Supply Alloy Steel Up to 35HRC C C SKD Up to From Up to 0.28% 0.29% SKS 45 HRC 46 HRC SUS Ti Inconel FC FCD Al Cu CFRP SMD Internal G G S S G G J69 -MTL Type Head SMD Internal G S S G G G S J69 -MEL Type Head SMD Internal G G S S S S S J76 -MFS Type Head SMD Internal G G J80 -MB Type Head WDX Type Internal G G S G G G G J82 PDL Type Internal G G S S G G G G S J96 PCT Type Internal G G S S G G G G S J96 SR Type Internal G G G S G G G S S J102 SK Type External S S S S S J32 SHK Type Internal S S S S S J32 SG Type - External S S S S J32 J SHG Type - Internal S S S S J32 Drilling AK Type Internal G G S S G S J113 Solid Special BAK Type Internal G G J113 Indexable HMD Type External S S S S S S J118 Reamer Brazed Others J5