Thread typeMachineWorkpiece material Counterboring Tools Indexable Counterboring Heads Applications STS (Single Tube System) DTS (Double Tube System) KUSTR KUDTR Drill head Drill diameter (mm) ø25 - ø39.99 ø40 - ø291.99 ø25 - ø39.99 ø40 - ø293.99 ø25 - ø39.99 ø40 - ø183.99 External 4-startthread ◯ ◯ - - ◯ ◯ Internal single-startthread - - ◯ ◯ - - Hole tolerance IT10 IT10 IT10 IT10 IT10 IT10 Surface finish Ra (μm) 2 2 2 2 2 2 Deep hole drillingmachines ◯ ◯ ◯ ◯ ◯ ◯ Lathes - - - - ◯ ◯ Machining centersM/C - - - - ◯ ◯ Steel ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Stainless ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Cast iron ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Non-ferrous ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Superalloys ★★ ★★ ★★ ★★ ★★ ★★ Hard materials(≥40HRC) ★★ ★★ ★★ ★★ ★★ ★★ Insert type* IIS160 TPMX IIS160 TPMX IIS160 TPMX Plus Cartridge and Guide pad+1 mm - +5 mm - ◯ - ◯ - ◯ ★★★ (Excellent) ★ (Standard) *See page 074 for TPMX inserts and page 075 for IIS inserts. 070 www.tungaloy.com