Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 10mm

The Dormer A777 Metric Cobalt Jobber Drill Bit is designed for heavy-duty applications where greater heat is generated during drilling. This makes it particularly suitable for higher tensile, tougher materials and is widely used in the Aerospace Industry.

Featuring a 135° split point, the drill bit ensures efficient performance and reduced walking for precise hole starting. The HSCo Cobalt steel construction offers excellent heat resistance and durability, making it ideal for demanding drilling tasks.

Key Features

• 135° split point for reduced walking and better centring
• Heavy-duty thick web construction for added strength
• Bronze surface treatment for enhanced corrosion resistance and performance
• Complies with DIN 338 RN, BS328, and ISO 235 standards

Technical Specifications

• Tip Diameter: 10.0mm
• Working Length: 87mm
• Overall Length: 133mm
• Flute Geometry: Standard Helix, Right-hand spiral
• Surface Treatment: Bronze
• Material: HSCo Cobalt steel

Point Angle Variations

• 0.30mm – 0.95mm: 118° Conical point
• 1.00mm – 1.40mm: 135° 4-facet point
• 1.50mm and above: 135° split point (Aerospace Spec P3)

This drill bit is an excellent choice for professional engineers and technicians working with stainless steel, alloy steel, and other high-strength materials.