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Dormer A777 HSCo Heavy-Duty Jobber Drill 4.20mm OL:75mm WL:43mm

Product Description

  • 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.

    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 Specification type P3 Point)

    Surface Treatment: Bronze
    Material: HSCo Cobalt steel

    DIN 338 RN / BS328 / ISO235

    Tip diameter: 4.20mm
    Working length: 43mm.
    Overall length: 75mm

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