Thread typesMachinesWorkpiece materials Drill Head Categories Indexable Drill Heads Applications STS (Single Tube System) DTS (Double Tube System) FNTR FNBM KUSTS FNTR-D FNBM-D KUDTS Drill heads Drill diameter (mm) ø16 - ø28 ø25 - ø65 ø38 - ø293.99 ø18.4 - ø28 ø25 - ø65 ø38 - ø183.99 External 4-startthread ◯ ◯ ◯ ◯ ◯ ◯ Internal single-startthread ◯ ◯ ◯ - - - Hole tolerance IT10 IT10 IT10 IT10 IT10 IT10 Surface finish Ra (μm) 2 2 3 2 2 3 Deep hole drillingmachines ◯ ◯ ◯ ◯ ◯ ◯ Lathes - - - ◯ ◯ ◯ Machining centersM/C - - - ◯ ◯ ◯ Steel ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Stainless ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Cast iron ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Non-ferrous ★★★ ★★★ ★★★ ★★★ ★★★ ★★★ Superalloys ★★ ★★ ★★ ★★ ★★ ★★ Hard materials(≥40HRC) ★★ ★★ ★★ ★★ ★★ ★★ Insert type TOHT FBH / FBM NPMX / TPMX TOHT FBH / FBM NPMX / TPMX Plus Cartridge and Guide pad+1 mm - +5 mm - - ◯ - - ◯ Page 010 - 011 024 - 025 036 - 047 012 026 048 - 052 ★★★ (Excellent) ★ (Standard) 006 www.tungaloy.com