Thread typeMachineWorkpiece material GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex A Solid drilling - Brazed drill heads -Applications STS (Single Tube System) DTS(Double Tube System) B MBU UTE BTU ETU Brazed drilling heads C Drill diameter (mm) ø8 - ø14.79 ø12.6 - ø20 ø12.6 - ø65 ø18.4 - ø65 D External single - - - thread External double - *1 *1 -threadExternal quadruplethread-*2*2 E Internal singlethread - - - - Hole tolerance*3 IT9 IT9 IT9 IT9Surface finish Ra (µm)*32222 F Deep hole drilling machines NC machines - - -Lathes--- G Machining centersM/C - - - Gundrill machines - - - -Steel H Stainless Cast ironNon-ferrous I Superalloys Hard materials(≥40HRC)PageJ134, J139 J135, J139 J136 - J137, J139 J138 - J139 J *1: UTE & BTU Drill head : ø12.6 mm - ø15.59 mm, External double thread *2: UTE & BTU Drill head : ø15.6 mm -, External quadruple thread *3: Just for reference(Excellent) (Standard) K L M Tungaloy J115