Dormer A777 HSCo Heavy-Duty Cobalt Jobber Drill Bit, 3.00mm

The Dormer A777 Metric Cobalt Jobber Drill Bit is engineered for heavy-duty applications where high heat generation occurs during drilling. Its robust 135° split point ensures efficient penetration and extended tool life, making it ideal for tough materials, particularly in industries like aerospace.

Crafted from HSCo cobalt steel, this drill bit offers exceptional durability and heat resistance. The bronze surface treatment further enhances performance by reducing friction and wear. Its standard helix flute geometry with a right-hand spiral and thick web design provides optimal chip evacuation and strength.

Key Features

• Precision point geometry:
  • 0.30mm–0.95mm: 118° conical point
  • 1.00mm–1.40mm: 135° 4-facet point
  • 1.50mm+: 135° split point (Aerospace NAS 907 Type P3)
• Heavy-duty construction: Designed for prolonged use in harsh drilling conditions.
• Material: High-speed cobalt steel (HSCo) for superior heat resistance.
• Surface treatment: Bronze coating for reduced wear and smooth operation.

Dimensions

• Tip diameter: 3.0mm
• Working length: 33mm
• Overall length: 61mm

Compliant with DIN 338 RN, BS328, and ISO 235 standards, this Dormer drill bit guarantees precision and reliability in demanding industrial applications.