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.
Need larger quantities? Need additional quantities? Get in touch and we'll arrange it for you.
- Dispatched within 0-2 business days
- Delivery to United States: 3-5 business days*
- Free Shipping Included
- Aerospace Industry
- Machining high-tensile materials
- Drilling stainless steel and alloys
- Precision engineering applications
- Ask Claude, ChatGPT or Perplexity to find the right tool, with our live prices and stock.
- Get a ready-made basket: one link puts everything in your basket here.
- You always pay securely here: your assistant never sees your card.
- 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 Canadian 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.
View Full Delivery & Returns PolicySecure Transactions
We take utmost care with your payment and personal details. Our website uses advanced encryption technology, including Secure Sockets Layer (SSL), to protect your information during transmission. You can verify a secure connection by looking for 'https' and a locked padlock in your browser.
Cookie Policy
Cookies enhance your shopping experience by keeping track of your cart and remembering you when you return. We also use banner advertising based on your browsing history to present products of potential interest.
Security Warning
Beware of phishing scams! We will never ask for personal details via email. If such information is required, we'll ask you to contact us by phone. If you receive an email requesting sensitive information, do not respond and let us know immediately.
Similar Products
You might like
