HF Cobalt Drill Bit Set 7/16" x 6" Aircraft Extension Long Deep Hole Drilling- 3Pcs
HF Cobalt Drill Bit Set 7/16" x 6" Aircraft Extension Long Deep Hole Drilling- 3Pcs
✨ 7/16" x 6" Cobalt Aircraft Extension Drill Bit Set – 3 Pcs
High-Performance Long-Reach Drill Bits for Deep Hole Drilling in Stainless Steel & Hard Metals
Engineered for precision and durability, this 3-piece set of 7/16" x 6" cobalt aircraft extension drill bits is built to tackle deep hole drilling applications in the most demanding materials. Made from premium cobalt steel with a 135° split point, these bits offer exceptional heat resistance, reduced walking, and superior penetration — ideal for drilling in stainless steel, cast iron, titanium alloys, and other hard metals.
Whether you're in aviation, automotive, fabrication, or heavy-duty industrial work, these long-reach bits deliver the performance professionals rely on.
✅ Key Features:
Extra-Long 6-Inch Length
Aircraft-style extension design provides access to hard-to-reach and deep areas, perfect for long hole drilling without compromising precision.Industrial-Grade M35 Cobalt Steel
Contains 5% cobalt for enhanced heat resistance and wear durability — ideal for high-speed drilling in stainless steel and other tough alloys.135° Split Point Tip
Self-centering design starts on contact, minimizes walking, and requires less thrust — providing cleaner entry and faster cutting.Precision Ground Flutes
Optimized chip removal and reduced friction for smoother, straighter drilling even at extended depths.Multi-Material Versatility
Perfect for stainless steel, hardened steel, cast iron, aluminum, brass, and other ferrous and non-ferrous metals.Professional Finish
Gold finish enhances heat resistance and adds corrosion protection for extended tool life.
🌟 Advantages:
Delivers accurate, burr-free deep holes in hard-to-drill metals
Resists heat buildup for longer cutting life under extreme conditions
Reduces bit walking, skidding, and surface damage
Ideal for precision work in aerospace, automotive, metal fabrication, and maintenance applications
📦 Specifications:
Bit Size: 7/16 inch (11.11mm)
Flute Length: 3-5/8 inch (103.188mm)
Overall Length: 6 inches (152.4mm)
Material: M35 Cobalt Steel
Point Angle: 135° Split Point
Quantity: 3 Pieces per set
| Brand: | HF |
|---|---|
| Isin: | ILH4SLSI1CDO |
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✨ 7/16" x 6" Cobalt Aircraft Extension Drill Bit Set – 3 Pcs
High-Performance Long-Reach Drill Bits for Deep Hole Drilling in Stainless Steel & Hard Metals
Engineered for precision and durability, this 3-piece set of 7/16" x 6" cobalt aircraft extension drill bits is built to tackle deep hole drilling applications in the most demanding materials. Made from premium cobalt steel with a 135° split point, these bits offer exceptional heat resistance, reduced walking, and superior penetration — ideal for drilling in stainless steel, cast iron, titanium alloys, and other hard metals.
Whether you're in aviation, automotive, fabrication, or heavy-duty industrial work, these long-reach bits deliver the performance professionals rely on.
✅ Key Features:
Extra-Long 6-Inch Length
Aircraft-style extension design provides access to hard-to-reach and deep areas, perfect for long hole drilling without compromising precision.Industrial-Grade M35 Cobalt Steel
Contains 5% cobalt for enhanced heat resistance and wear durability — ideal for high-speed drilling in stainless steel and other tough alloys.135° Split Point Tip
Self-centering design starts on contact, minimizes walking, and requires less thrust — providing cleaner entry and faster cutting.Precision Ground Flutes
Optimized chip removal and reduced friction for smoother, straighter drilling even at extended depths.Multi-Material Versatility
Perfect for stainless steel, hardened steel, cast iron, aluminum, brass, and other ferrous and non-ferrous metals.Professional Finish
Gold finish enhances heat resistance and adds corrosion protection for extended tool life.
🌟 Advantages:
Delivers accurate, burr-free deep holes in hard-to-drill metals
Resists heat buildup for longer cutting life under extreme conditions
Reduces bit walking, skidding, and surface damage
Ideal for precision work in aerospace, automotive, metal fabrication, and maintenance applications
📦 Specifications:
Bit Size: 7/16 inch (11.11mm)
Flute Length: 3-5/8 inch (103.188mm)
Overall Length: 6 inches (152.4mm)
Material: M35 Cobalt Steel
Point Angle: 135° Split Point
Quantity: 3 Pieces per set





- Number of Items in Set: 3
- Item Diameter: 7/16 in.
- Color: Gold
- Material: Steel
- MPN: LDB01
- Item Length: 6 in
- Suitable For: Drill, Lathe, Rotary Tool, Work Bench, Electric Drill, Corded/Cordless Drill, Drill Press, Drilling Machine, CNC Machine
- Brand: HF
- Type: Drill Bit, Long drill bit, Aircraft Extension Drill bit, Metal steel drill bit, Cutting Tools/Drilling Tools, Power Tools Accessories, Twist Drill Bit Long
- Model: LDB01
- Package Quantity: 1
- Country/Region of Manufacture: China
- Application: Cutting, Drilling hole in steel metal, Drilling Metal, Cutting holes in steel, metalworking Tooling, Installation and maintenance, Automobile reparing, DIY Home Improvement
- Item Width: 1 in
- Item Weight: 10.15 Oz
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