Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 10.50mm
Dormer A777 HSCo drill bit (10.50mm) for tough materials. 135° split point, cobalt steel, aerospace-grade precision. DIN/BS/ISO compliant.
The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is crafted from high-quality cobalt steel (HSCo), offering exceptional durability and resistance to heat, making it ideal for drilling tough, high-tensile materials. With a precision-engineered 135° split point, this drill bit minimizes walking and ensures accurate hole starting, particularly effective in demanding applications such as aerospace engineering.
Key Features:
- Flute Geometry: Standard helix, right-hand spiral with a thick web for improved strength and chip evacuation.
- Point Angle: Varies by size – 118° conical for 0.30–0.95mm bits, 135° four-facet for 1.00–1.40mm, and 135° split point (NAS 907 Aerospace Spec P3 point) for 1.50mm and above.
- Surface Treatment: Bronze coating enhances corrosion resistance and reduces friction.
- Material: Premium HSCo cobalt steel for superior heat resistance and longevity.
- Spec Compliance: Meets DIN 338 RN, BS328, and ISO 235 standards.
Technical Specifications:
- Tip Diameter: 10.50mm
- Working Length (WL): 87mm
- Overall Length (OL): 133mm
- Weight: 72g
Designed for heavy-duty use, this drill bit excels in applications requiring precision and endurance, ensuring clean, efficient drilling even in the most challenging materials.
Need larger quantities? Need additional quantities? Get in touch and we'll arrange it for you.
- Drilling high-tensile materials
- Aerospace industry applications
- Precision engineering projects
- Heavy-duty metalworking
- 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 1.50mm and above)
- Compliance: DIN 338 RN / BS328 / ISO 235
- Tip Diameter: 10.50mm
- Working Length: 87mm
- Overall Length: 133mm
- Weight: 72g
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.
View Full Delivery & Returns PolicySecure Transactions
We take the utmost care with your payment and personal details. Our website employs 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 basket 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 request 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 may like
