Dormer A777 HSCo Heavy-Duty Cobalt Drill Bit, 4.2mm, 75mm
Dormer's precision A777 HSCo cobalt drill bit (4.2mm) features 135° split point for aerospace & tough materials.
The Dormer A777 HSCo Heavy-Duty Cobalt Drill Bit is engineered for precision and durability in demanding drilling applications. Its robust design features a heavy-duty 135° split point, making it ideal for high-tensile materials where significant heat generation occurs – particularly suited for aerospace industry applications.
Key Features
- Made from HSCo Cobalt steel for enhanced heat resistance and durability
- 135° split point geometry (to NAS 907 Aerospace Specification type P3 Point) for improved centering and reduced walking
- Standard helix flute geometry with right-hand spiral and thick web for sturdy performance
- Bronze surface treatment for reduced friction and extended tool life
- Complies with DIN 338 RN / BS328 / ISO 235 standards
Applications
- Aerospace industry applications
- Drilling high-tensile or difficult-to-machine materials
- Heavy-duty industrial drilling where heat resistance is crucial
This drill bit combines exceptional performance with the trusted quality of Dormer’s precision engineering.
- Shipped within 0-2 business days
- Shipping to United States: 3-5 business days*
- Free Shipping Included
- Aerospace industry applications
- High-tensile material drilling
- Industrial heavy-duty drilling
- Precision metalworking
- Material: HSCo Cobalt steel
- Flute Geometry: Standard helix, right-hand spiral, thick web
- Point Angle: Varies by size (see details in description)
- Surface Treatment: Bronze
- Tip Diameter: 4.20mm
- Working Length: 43mm
- Overall Length: 75mm
Always follow local regulations and product guidance.
Free standard delivery on US mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For defective items, contact us within 14 days for a replacement or refund.
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