Dormer A777 HSCo Heavy-Duty Cobalt Jobber Drill Bit 2.50mm

The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is engineered for precision and durability, featuring a heavy-duty 135° split point design. This makes it ideal for high-heat drilling applications, particularly in demanding environments such as the aerospace industry and when working with higher tensile, tougher materials.

Key Features:

• Made from HSCo Cobalt steel for superior strength and heat resistance
• Bronze surface treatment enhances durability and performance
• Split point geometry (NAS 907 Aerospace Specification type P3 Point) ensures clean and efficient cutting with reduced walking
• Flute geometry: Standard helix, right-hand spiral, thick web for improved chip evacuation

Specifications:

• Tip Diameter: 2.50mm
• Working Length: 30mm
• Overall Length: 57mm
• Point Angle Variants:
  • 0.30mm - 0.95mm: 118° conical point
  • 1.00mm - 1.40mm: 135° 4-facet point
  • 1.50mm and above: 135° split point (NAS 907 compliant)

Compliant with DIN 338 RN, BS328, and ISO 235 standards, this drill bit delivers reliability and precision for industrial and professional applications.