DEEP HOLE DRILLING Index Single Tube System Double Tube System Single Tube System (STS) – Double Tube System (DTS) - Cooling fluid is induced through the gap between Cooling fluid is induced between the coaxial the drill and the hole. Conveying the chips through tubes, conveying the chips through the inner tube the tube requires the use of dedicated machines. and can be applied on standard machines. DEEP HOLE DRILLING Deep Drilling Heads Identification System D S D - E C XXX.XX XX XX Hole Diameter I - Insert A - Adjustable Insert C - Cartridge Chipbreaker F - Fast Feed (letters) 0 - Brazed, 1 tip, -or- 1 thread start Insert Chamfer 1 - Brazed, 1 tip Angle 2 - Brazed, 2 tips (for boring) 3 - Brazed, 3 tips (numbers) E - External Thread I - Internal Thread D - Drill C - Counterbore with Through Hole T - Counterbore without Through Hole Only for Brazed Heads S - Single Tube D - Double Tube P - Steel M - Stainless K - Cast Iron N - Aluminum D - Deep Drilling/Counterbore I - Inch - Deep Drilling/Counterbore S - Special - Deep Drilling/Counterbore Grade 0 - Uncoated 1 - TiAlN Coating Z - TiCrAlN Coating 601 601