Dormer A777 HSCo Heavy-Duty Cobalt Jobber Drill Bit, 5mm x 52mm

The Dormer A777 HSCo Heavy-Duty Cobalt Jobber Drill Bit is designed for high-performance drilling applications, especially where greater heat is generated during operation. This metric cobalt drill bit features a robust 135° split point, making it ideal for drilling into higher tensile and tougher materials, with particular suitability for aerospace industry applications.

Key Features:

• Material: HSCo Cobalt steel for superior durability and heat resistance.
• Point Geometry:
  • 0.30mm to 0.95mm: 118° conical point.
  • 1.00mm to 1.40mm: 135° 4-facet point.
  • 1.50mm and above: 135° split point (NAS 907 Aerospace Specification type P3 Point).
• Flute Geometry: Standard helix, right-hand spiral, thick web for efficient chip removal.
• Surface Treatment: Bronze finish for reduced friction and extended tool life.

Specifications:

• Tip Diameter: 5.0mm
• Working Length: 52mm
• Overall Length: 86mm
• Compliance: DIN 338 RN / BS328 / ISO 235 standards.

This drill bit is engineered for precision and reliability, even in the most demanding drilling scenarios.