Dormer A7774.8 HSCo HeavyDuty Jobber Drill 4.80mm OL:86mm WL:52mm

Dormer A7774.8 HSCo Heavy-Duty Jobber Drill 4.80mm OL:86mm WL:52mm Dormer A777 Heavy-duty Cobalt jobber drill for use when greater heat is generated during drilling, e.g on higher tensile, tougher materials and in particular the Aerospace Industry. Specifications: 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 Areospace Spe... - Manufacturers part numbers: A7774.8|A77748

• For use on machines or hand held applications
• Bronze finish identifies Cobalt based substrate and reduces built-up-edge
• Heavy Duty design provided increase strength for drilling difficult materials
• 135 degree split point provides self centering, low thrust and easier penetration
• High Speed Cobalt (HSCo) provides superior hot hardness when drilling