Solid Carbide Drills Tool Selection Guide standard standard range ⅷ first choice ࠗ alternate choice solid carbide drillsfor external coolantor dry machining diameter range drillingholedepthseriesgradePMKNSHtolerancemin–maxmin–maxL/D1 VariDrill™multiple-material drillingVDS20 WU25PD ⅷ ⅷ ⅷ ⅷ ⅷ IT9–IT10 1,0–20,0 .0394–.7874 3 x–5 x TOP DRILL S™ for steelapplication-specific drillingTDS202WP20PD ⅷ ࠗ ࠗ IT9–IT10 3,0–20,0 .1181–.7874 5xD TOP DRILL S for cast ironapplication-specific drillingTDS212WK15PD ࠗ ⅷ IT9–IT10 3,0–20,0 .1181–.7874 5xD TOP DRILL S+™multiple-application drillingTDS301WU25PD ⅷ ࠗ ⅷ ࠗ ࠗ IT9–IT10 3,0–20,0 .1181–.7874 3xD standard standard range ⅷ first choice ࠗ alternate choice solid carbide drillswith internal coolant channel diameter range drillingholedepthseriesgradePMKNSHtolerancemin–maxmin–maxL/D1 VariDrillmultiple-material drillingVDS40 WU25PD ⅷ ⅷ ⅷ ⅷ ⅷ ࠗ IT9–IT10 1,0–20,0 .0394–.7874 3 x–8 x TOP DRILL S for steelapplication-specific drillingTDS40WP20PD ⅷ ࠗ ࠗ IT9–IT10 3,0–20,0 .1181–.7874 3 x–8 x TOP DRILL S for cast ironapplication-specific drillingTDS41WK15PD ࠗ ⅷ IT9–IT10 3,0–20,0 .1181–.7874 3 x–8 x TOP DRILL S+multiple-application drillingTDS50WU25PD ⅷ ࠗ ⅷ ࠗ ࠗ IT9–IT10 3,0–20,0 .1181–.7874 3 x–8 x TOP DRILL S+ 12 x D deep-hole drilling without TDS504 WU20PD ⅷ ⅷ ⅷ ࠗ IT9–IT10 3,0–20,0 .1181–.7874 3 x–8 x piloting TOP DRILL Deepsuperior deep-hole drillingTDD10WU20PD ⅷ ࠗ ⅷ IT9–IT10 3,0–20,0 .1181–.5118 15 x–30 x TOP DRILL G™difficult drilling applicationsTDG53WN10HD ⅷ IT8–IT9 3,0–20,0 .1181–.7874 5 x–12 x TOP DRILL Flat-Bottomfor flat-bottom applicationsWU20PD ⅷ ࠗ ⅷTDF51WN15HDⅷ IT9–IT10 — — —IT9–IT10——— T2 widia.com