Dormer A777 HSCo Heavy-Duty Jobber Drill 6.80mm OL:109mm WL:69mm

A777 Metric Cobalt Jobber Drill Bits have a heavy-duty, 135 split point for use when greater heat is generated during drilling, e.g on higher tensile tougher materials and in particular the Aerospace Industry.

Specification

Flute Geometry: Standard Helix, Right hand spiral, Thick Web
Point Angle:
0.30 mm – 0.95 mm 118 Conical point
1.00 mm to 1.40 mm inclusive 135 4 facet point
1.50 mm and above 135 split point sizes (Split point geometry to NAS 907 Aerospace Specification type P3 Point)

Surface Treatment: Bronze
Material: HSCo Cobalt steel

DIN 338 RN / BS328 / ISO 235

Tip diameter: 6.80mm
Working length: 69mm.
Overall length: 109mm.