Dormer A777 HSCo Heavy-Duty Jobber Drill 4.80mm OL86mm WL52mm DOR480COB

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 WebPoint Angle: 0.30 mm - 0.95 mm 118 Conical point1.00 mm to 1.40 mm inclusive 135 4 facet point1.50 mm and above 135 split point sizes (Split point geometry to NAS 907 Aerospace Specification type P3 Point) Surface Treatment: BronzeMaterial: HSCo Cobalt steel DIN 338 RN / BS328 / ISO 235