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Dormer A777 HSCo Heavy-Duty Jobber Drill 8.50mm OL: 117mm WL: 75mm A7778.5

List Price: £26.58 Special Price £12.24 £10.20
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Tip diameter: 5.80mmWorking length: 75mm.Overall length: 117mm....
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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.


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 / ISO 235

Tip diameter: 5.80mm
Working length: 75mm.
Overall length: 117mm.


More Information
Manufacturers Part NumberA7778.5
Promo ID0
Package Height (cm)0.9
Package Width (cm)0.9
Package Length (cm)11.7
Bullet 1Standard Helix.
Bullet 2Right hand spiral.
Bullet 3Thick Web.
Bullet 4Material: HSCo Cobalt steel
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