Dormer Jobber Drill, Pack of 10

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

Product Description HSS-E jobber drill with straight shank DIN 338 N 135° 4xD bronze for alloy steel <1620 N/mm², ductile iron <1000 N/mm², titanium alloys <1250 N/mm² and nickel alloys <900 N/mm² Manufacturer's Description Dormer A777 Hsco Cobalt Heavy Duty Jobber Drill 3.20mm Application : 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 : 0.30mm - 0.95 mm 118º Conical point 1.00mm to 1.40mm inclusive 135º 4 facet point 1.50mm and above 135º split point sizes (Split point geometry to NAS 907 Areospace Specification type P3 Point) Surface Treatment : Bronze Material : HSCo Cobalt steel DIN 338 RN / BS328 / ISO235