Dormer A777 HSCo Heavy-Duty Jobber Drill Bit, 3.5mm, Cobalt Steel

The Dormer A777 HSCo Heavy-Duty Jobber Drill Bit is designed for professional use in demanding applications where high temperatures are generated during drilling. Constructed from HSCo Cobalt steel, this drill bit excels when working with tougher, higher tensile materials, making it particularly suitable for the aerospace industry.

Key Features:

• Heavy-duty construction: Built to withstand extreme conditions
• 135° split point geometry: Reduces walking and improves centering
• Special flute design: Standard helix, right-hand spiral with thick web for strength
• Bronze surface treatment: Enhances durability and heat resistance

Precision Engineering:

The drill bit features different point angles depending on size:

• 0.30 mm - 0.95 mm: 118° conical point
• 1.00 mm - 1.40 mm: 135° 4 facet point
• 1.50 mm and above: 135° split point (NAS 907 Aerospace Specification type P3 Point)

Compliant with DIN 338 RN / BS328 / ISO 235 standards, this drill bit offers exceptional performance in industrial applications where precision and durability are paramount.