Thread typeMachineWorkpiece material DEEP DSRIOLILIDNCGA-RBITDAESDYSRITLELMS SELUESCETRIOGNUGIDUEIDE Indexable Counterboring Heads Applications STS (Single Tube System) DTS (Double Tube System) DSC - EA DSC - EC DSC – IA/IC DDC - EA/EC Drill head Drill diameter (mm) ø25 - 39.99 ø40 - 291.99 ø25 - 39.99 ø40 - 293.99 ø25 - 39.99 ø40 - 183.99 External 4-start thread 3 3 - - 3 3 Internal single-start thread - - 3 3 - - Hole tolerance IT10 IT10 IT10 IT10 IT10 IT10 Surface finish Ra (μm) 2 2 2 2 2 2 Deep hole drilling machines 3 3 3 3 3 3 NC machines - - - - 3 3 Lathes - - - - 3 3 Machining centers M/C - - - - 3 3 P Steel ••• ••• ••• ••• ••• ••• M Stainless ••• ••• ••• ••• ••• ••• K Cast iron ••• ••• ••• ••• ••• ••• N Non-ferrous ••• ••• ••• ••• ••• ••• S Superalloys •• •• •• •• •• •• H Hard materials (≥40HRC) •• •• •• •• •• •• Insert type XPMT TPMX XPMT TPMX XPMT TPMX Plus Cartridge and Guide pad+1 mm - +5 mm - 3 - 3 - 3 Page 233 236 240 242 246 249 •••(Excellent) •(Standard) 189