Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 10mm
Dormer A777 HSCo drill bit (10mm), 135° split point for high-tensile materials. Perfect for aerospace applications.
The Dormer A777 Metric Cobalt Jobber Drill Bit is designed for heavy-duty applications where greater heat is generated during drilling. This makes it particularly suitable for higher tensile, tougher materials and is widely used in the Aerospace Industry.
Featuring a 135° split point, the drill bit ensures efficient performance and reduced walking for precise hole starting. The HSCo Cobalt steel construction offers excellent heat resistance and durability, making it ideal for demanding drilling tasks.
Key Features
- 135° split point for reduced walking and better centring
- Heavy-duty thick web construction for added strength
- Bronze surface treatment for enhanced corrosion resistance and performance
- Complies with DIN 338 RN, BS328, and ISO 235 standards
Technical Specifications
- Tip Diameter: 10.0mm
- Working Length: 87mm
- Overall Length: 133mm
- Flute Geometry: Standard Helix, Right-hand spiral
- Surface Treatment: Bronze
- Material: HSCo Cobalt steel
Point Angle Variations
- 0.30mm – 0.95mm: 118° Conical point
- 1.00mm – 1.40mm: 135° 4-facet point
- 1.50mm and above: 135° split point (Aerospace Spec P3)
This drill bit is an excellent choice for professional engineers and technicians working with stainless steel, alloy steel, and other high-strength materials.
- Aerospace Industry
- Machining high-tensile materials
- Drilling stainless steel and alloys
- Precision engineering applications
- Material: HSCo Cobalt steel
- Surface Treatment: Bronze
- Flute Geometry: Standard Helix, Right-hand spiral, Thick Web
- Point Angle: 135° (Split point for sizes ≥1.50mm)
- Tip Diameter: 10.0mm
- Working Length: 87mm
- Overall Length: 133mm
- Weight: 61g
- Standards Compliant: 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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