Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 5.50mm
Dormer A777 HSCo cobalt drill bit (5.5mm) for aerospace & tough materials. 135° split point, bronze-treated.
The Dormer A777 Metric Cobalt Jobber Drill Bit is engineered for heavy-duty applications, featuring a robust 135° split point design that excels in high-heat drilling scenarios. This makes it particularly effective for tougher, higher tensile materials, with notable suitability for the Aerospace Industry.
Key Features
- Material: Premium HSCo Cobalt steel ensures exceptional durability and heat resistance.
- Point Geometry: Varies by size – 118° conical point (0.30–0.95mm), 135° 4-facet point (1.00–1.40mm), or 135° split point (1.50mm+), adhering to NAS 907 Aerospace Specification (Type P3 Point).
- Flute Design: Standard helix, right-hand spiral with a thick web for optimal chip evacuation and strength.
- Surface Treatment: Bronze finish enhances wear resistance and performance longevity.
Specifications
- Tip Diameter: 5.50 mm
- Working Length: 57 mm
- Overall Length: 93 mm
- Standards Compliant: DIN 338 RN / BS328 / ISO 235
Ideal for professionals requiring precision and resilience, the A777 delivers reliable performance in demanding environments.
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
- Drilling high-tensile materials
- Aerospace industry applications
- Heavy-duty metalworking
- Material: HSCo Cobalt steel
- Flute Geometry: Standard helix, right-hand spiral, thick web
- Point Angle: 135° split point (size-dependent)
- Surface Treatment: Bronze
- Tip Diameter: 5.50 mm
- Working Length: 57 mm
- Overall Length: 93 mm
- Standards: 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.
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