Dormer A777 HSCo Heavy-Duty Jobber Drill Bit 4.5mm, 80mm

The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is engineered for challenging drilling applications where high temperatures and tough materials are involved. Featuring a robust 135° split point, it is specifically designed for use in the aerospace industry and other high-tensile applications. The drill bit ensures efficient chip removal and reduced walking, thanks to its standard helix, right-hand spiral, and thick web design.

Constructed from HSCo Cobalt steel, this bit offers exceptional durability and heat resistance, making it ideal for prolonged use in demanding environments. The bronze surface treatment enhances performance and longevity, ensuring consistent drilling precision.

Specifications

• Flute Geometry: Standard Helix, Right-hand spiral, Thick Web
• Point Angle:
  • 0.30 mm - 0.95 mm: 118° Conical point
  • 1.00 mm to 1.40 mm: 135° 4-facet point
  • 1.50 mm and above: 135° split point (NAS 907 Aerospace Specification type P3 Point)
• Material: HSCo Cobalt steel
• Surface Treatment: Bronze
• Standards Compliant: DIN 338 RN / BS328 / ISO 235
• Tip Diameter: 4.50 mm
• Working Length: 47 mm
• Overall Length: 81 mm

Ideal for professionals tackling high-strength materials, this drill bit from Dormer guarantees reliable performance and long-lasting sharpness.