Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 6.5mm, Cobalt Steel

The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is engineered for demanding drilling applications where high temperatures are generated. Manufactured from premium HSCo cobalt steel, these drill bits are specifically designed for tough materials and are widely used in the aerospace industry.

Featuring a 135° split point (for sizes 1.50mm and above), these bits reduce walking and provide better centring, ensuring precise and efficient drilling. The thick web standard helix flute geometry enhances durability and strength, making them ideal for heavy-duty use.

Key Specifications

• Material: HSCo cobalt steel
• Surface Treatment: Bronze
• Flute Geometry: Standard helix, right-hand spiral, thick web
• Point Angles:
  • 0.30mm – 0.95mm: 118° conical point
  • 1.00mm – 1.40mm: 135° 4-facet point
  • 1.50mm and above: 135° split point (NAS 907 Aerospace Specification P3 point)

With a diameter of 6.50mm, a working length of 63mm, and an overall length of 101mm, these drill bits provide excellent reach and stability. Compliant with DIN 338 RN, BS328, and ISO 235 standards, they are manufactured to the highest quality specifications.

Ideal for professionals requiring precision and durability, the Dormer A777 drill bit is a must-have for workshops dealing with high-tensile materials.