Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 3.80mm
Heavy-duty Dormer A777 cobalt jobber bit (3.80mm) for tough materials. 135° split point, aerospace-grade.
The Dormer A777 Metric Cobalt Jobber Drill Bit is engineered for heavy-duty applications where high heat is generated during drilling operations. Featuring a robust 135° split point, this bit is specifically designed for drilling tough, high-tensile materials, making it particularly suited for aerospace industry applications.
Constructed from HSCo Cobalt steel, this drill bit offers exceptional durability and heat resistance. The standard helix, right-hand spiral, and thick web flute geometry ensure efficient chip removal and reduced friction. The bronze surface treatment enhances corrosion resistance, prolonging the tool's lifespan.
Point Angle Specifications
- 0.30 mm - 0.95 mm: 118° conical point
- 1.00 mm - 1.40 mm: 135° 4-facet point
- 1.50 mm and above: 135° split point (NAS 907 Aerospace Specification P3 Point)
Compliant with DIN 338 RN / BS328 / ISO 235 standards, this drill bit guarantees precision and reliability. Its compact dimensions and optimised geometry make it ideal for professional workshops and industrial applications alike.
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
- Industrial metalwork
- Precision engineering
- Material: HSCo Cobalt steel
- Flute Geometry: Standard Helix, Right-hand Spiral, Thick Web
- Point Angle: 135° Split Point (1.50mm and above)
- Surface Treatment: Bronze
- Tip Diameter: 3.80 mm
- Working Length: 43 mm
- Overall Length: 75 mm
- Weight: 6 g
- 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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