Dormer A777 HSCo Heavy-Duty Cobalt Drill Bit, 4.2mm, 75mm

The Dormer A777 HSCo Heavy-Duty Cobalt Drill Bit is engineered for precision and durability in demanding drilling applications. Its robust design features a heavy-duty 135° split point, making it ideal for high-tensile materials where significant heat generation occurs – particularly suited for aerospace industry applications.

Key Features

• Made from HSCo Cobalt steel for enhanced heat resistance and durability
• 135° split point geometry (to NAS 907 Aerospace Specification type P3 Point) for improved centering and reduced walking
• Standard helix flute geometry with right-hand spiral and thick web for sturdy performance
• Bronze surface treatment for reduced friction and extended tool life
• Complies with DIN 338 RN / BS328 / ISO 235 standards

Applications

• Aerospace industry applications
• Drilling high-tensile or difficult-to-machine materials
• Heavy-duty industrial drilling where heat resistance is crucial

This drill bit combines exceptional performance with the trusted quality of Dormer’s precision engineering.