Tempered Steel Hardened Steel Stainless Steel Titanium Alloy Heat-resistant Steel Cast Iron Ductile Cast Iron Aluminum Alloy Copper Alloy Composite OthersBrazedReamersIndexableIndexableInsert TypeHead TypeSolidDrilling Drill Selection Guide Carbon Steel Series Drilling Depth (L/D) Coating Coolant Alloy Steel Ref. Page up to 35HRC Supply C0.28%or less C0.29%SKDSKS 45HRC 46HRCor lessor more SUS Ti Inconel FC FCD Al Cu CFRP MDE-E Type NX External S G G S S S S G G J8Coat MDE-H Type NX Internal G G G S G S S G G S SCoat J8 J GS Type External S G G S S S S S S G J46Coat HGS Type Internal G G G S S G G S S G S J46Coat HY Type Internal G G G G J68Coat ExternalS2DG G G S S S S S S S MDF Type Coat ExternalL2DG G G S S S S S J34 Internal G G G S S S S S XHGS Type Internal S G G S S S G J74 Coat PHT Type Internal S G G S S S G J74Coat WGS Type External S G G S S S S J58Coat MDM Type NX Internal S S G G S S S J26 Coat HX Type Internal G G J60Coat NHGS Type Aurora Internal G G J82 Coat DAL Type - External G S J88 DDL Type - External G S J88 D Type External G G G J70Coat SGS Type External S S G J72Coat SDC Type SUMIDIA DryCoat S G J87 J2-2