Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 7.5mm Cobalt

The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is engineered for demanding applications where high performance and durability are essential. Featuring a 135° split point designed for optimal performance in high-heat drilling conditions, this drill bit excels when working with tougher, high-tensile materials, particularly in the aerospace industry.

Crafted from HSCo Cobalt steel, these bits offer exceptional strength and heat resistance, ensuring longer tool life even under rigorous use. The bronze surface treatment enhances both corrosion resistance and durability.

Key Features:

• Flute Geometry: Standard helix, right-hand spiral, thick web for efficient chip removal
• Point Angle:
  • 0.30–0.95mm: 118° conical point
  • 1.00–1.40mm: 135° 4-facet point
  • 1.50mm and above: 135° split point (meeting NAS 907 Aerospace Specification P3 standard)
• Designed for tough materials: Ideal for stainless steel, alloy steels, and other high-tensile metals

With a 7.5mm tip diameter, 69mm working length, and 109mm overall length, this drill bit provides precision and control while maintaining robustness in heavy-duty applications.