
A wide range of indexable drills for various applications
Twisted coolant hole in the drill body provides excellent chip evacuation and surface finish

Applications & Features
Applications
Features
1. Rich line-up of drills and Suitable for various applications
- Drill diameter: ø12.5 – ø 54.0 mm
- L/D = 2, 3, 4, 5
A wide variety of chipbreakers and grades offers high versatility.
2. Excellent chip evacuation
Coolant hole increases coolant flow by 1.5 times, which improves chip evacuation, resulting in excellent surface finish.
3. TungDrillBig
Drill body with adjustable cartridge covers hole diameter ranges from: øDc: ø55 mm – ø80 mm, L/D = 2.5
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Highly rigid body and optimized insert position
Provides well balanced cutting forces and stable machining conditions for highly accurate hole making.
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Adjustable tool diameter
TungDrillBig features 5 drill body sizes that can accommodate a range of setting plates covering a diameter range from ø55 mm – ø80 mm.
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Variety of design options
TungDrillTwisted and TungDrill-Six type cartridges can be affixed to the same body.
Inserts & Grades
Inserts
Main Grades
AH9030
- P15 – P35 / K10 – K25
- High wear resistance
- Suitable for drilling steel and cast iron at high speed
AH6030
- M25 – M35 / S15 – S30
- High fracture resistance
- Suitable for drilling stainless steel and heat-resistant alloy under general cutting conditions
GH130
- P25 – P40 / M25 – M40 / K25 – K40
- High chipping and fracture resistance
- Suitable for steel, stainless steel, and cast iron
Drill bodies & Related tools
Practical examples
Example #1
Automotive Industry
Part: | Pinion |
Material: | SCM435 / 34CrMo4 |
Drill: | TDX185F25-2 |
Insert: | XPMT06X308R-DW |
Grade: | AH9030 |
Cutting conditions: | Vc = 160 (m/min) f = 0.11 (mm/rev) Vf = 300 (mm/min) H = 18 (mm) Coolant: Wet Machine: NC lathe |

Example #2
Automotive Industry
Part: | York |
Material: | S33C |
Drill: | TDX200F25-3 |
Insert: | XPMT06X308R-DJ |
Grade: | AH725 |
Cutting conditions: | Vc = 138 (m/min) f = 0.06 (mm/rev) Vf = 132 (mm/min) H = 25 (mm) Coolant: Wet Machine: Special-purpose machine |

Example #3
Automotive Industry
Part: | Connecting rod |
Material: | S55C |
Drill: | TDX200F25-3 |
Insert: | XPMT06X308R-DW |
Grade: | AH725 |
Cutting conditions: | Vc = 90 (m/min) f = 0.06 (mm/rev) Vf = 86 (mm/min) H = 22 (mm) Coolant: Wet Machine: Special-purpose machine |

Standard cutting conditions
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