
Drill Selection Guide Tempered Steel Hardened Steel Stainless Steel Aluminum Alloy Heat-resistant Copper Alloy Composite Cast Iron Cast Iron Ti Alloy Ductile Steels Coolant Carbon Steel, Description Drilling Depth (L/D) Coating Alloy Steel Ref. Page Supply Up to 35HRC C C SKD Up to From Up to SUS Ti Inconel FC FCD Al Cu CFRP 0.28% 0.29% SKS 45 HRC 46 HRC GS Type External S G G S S S S S J8 HGS Type Internal G G G S G G S S S S J8 HY Type Internal G G G G J28 External G G G S S S S S External G G G S S S S S MDF Type J34 Internal G G G S S S S S XHGS Type Internal S G G S S S S J48 PHT Type Internal S G G S S S S J48 WGS Type External S G G S S S S S J44 HX Type Internal G G J20 NHGS Type Internal S S G G J56 DAL Type - External G S J62 J Drilling DDL Type - External G S J62 D Type External G G S J30 Solid SGS Type External S G J46 Special Indexable SDC Type Dry S G J61 Reamer Brazed MLDH Type Internal G G S S G G G S J63 Others MLDH-P Type Internal G G S S G G G S J63 MDSS Type External G G G G S G S G G S J66 MDUS Type External G G G S G J66 MDUP Type External G G G S G J66 J3