Thread typeMachineWorkpiece material Tr e p a n n i n g To o l s Indexable Trepanning Heads Applications STS(Single Tube System) UTT Drill head Drill diameter (mm) ø100 - ø328 ø100 - ø305.99 External 4-startthread ◯ - Internal single-startthread - ◯ Hole tolerance IT10 IT10 Surface finish Ra (μm) 2 2 Deep hole drillingmachines ◯ ◯ Lathes - - Machining centersM/C - - Steel ★★★ ★★★ Stainless ★★★ ★★★ Cast iron ★★★ ★★★ Non-ferrous ★★★ ★★★ Superalloys ★★ ★★ Hard materials(≥40HRC) ★★ ★★ Insert type* TPMX TPMX Plus Cartridge and Guide pad+1 mm - +5 mm - - ★★★ (Excellent) ★ (Standard) *See page 053 for UNIDEX inserts. Tungaloy 071