Dormer A777 HSCo Heavy-Duty Cobalt Jobber Drill Bit 2.50mm
Dormer A777 cobalt jobber drill (2.50mm) for aerospace and tough materials. Heat-resistant with 135° split point.
The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is engineered for precision and durability, featuring a heavy-duty 135° split point design. This makes it ideal for high-heat drilling applications, particularly in demanding environments such as the aerospace industry and when working with higher tensile, tougher materials.
Key Features:
- Made from HSCo Cobalt steel for superior strength and heat resistance
- Bronze surface treatment enhances durability and performance
- Split point geometry (NAS 907 Aerospace Specification type P3 Point) ensures clean and efficient cutting with reduced walking
- Flute geometry: Standard helix, right-hand spiral, thick web for improved chip evacuation
Specifications:
- Tip Diameter: 2.50mm
- Working Length: 30mm
- Overall Length: 57mm
- Point Angle Variants:
- 0.30mm - 0.95mm: 118° conical point
- 1.00mm - 1.40mm: 135° 4-facet point
- 1.50mm and above: 135° split point (NAS 907 compliant)
Compliant with DIN 338 RN, BS328, and ISO 235 standards, this drill bit delivers reliability and precision for industrial and professional applications.
- Aerospace industry applications
- High-tensile materials drilling
- Tough material drilling
- Industrial metalworking
- Tip Diameter: 2.50mm
- Working Length: 30mm
- Overall Length: 57mm
- Point Angle: 135° split point (1.50mm and above)
- Flute Geometry: Standard helix, right-hand spiral, thick web
- Material: HSCo Cobalt steel
- Surface Treatment: Bronze
- Standards: DIN 338 RN / BS328 / ISO 235
Always follow local regulations and product guidance.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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