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Dormer Pramet A7779.8 5970968 jobber length drill bit, 9.8mm cutting diameter, 133mm overall length, 87mm flute length. Cobalt High Speed Steel (HSS-E) with Bronze coating and steam tempered surface. DIN 338 standard, 135° split point, standard spiral flute, cylindrical shank. Suitable for steel, cast iron, and high-temperature alloys.
MODEL 5970968
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Drill point 135°
Basic Standard
DIN 338
Coating
Bronze
Connection (shank) description
Cylindrical shank
Connection diameter - millimeter (DCON MS)
9.8
Cutting diameter - inch (DC)
0.3858
Cutting diameter - millimeter (DC)
9.8
Cutting diameter tolerance class (TCDC)
h8
Drill Length
Jobber
EDP number
375723
Hand (Cutting direction)
Right
Length chip flute - inch (LCF)
3.4252
Length chip flute - millimeter (LCF)
87
Material
HSS-E
Material application
K - Cast iron, P - Steel and cast steel, S - High-temperature alloys
MID number
5970968
Ordering code ANSI
A7779.8
Overall length - inch (OAL)
5.2362
Overall length - millimeter (OAL)
133
Point Angle (SIG)
135
Spiral form
Standard Spiral
Surface treatement
Steam Tempered
Usable length (ULDR)
4
Recommended for use in difficult materials and applications, the A777 drill from Dormer has a 135 degree split point which helps to self-center the drill and reduces the amount of force needed to drill the hole, whilst the bronze oxide finish helps stop work piece material from sticking to the cutting edge of the drill.
The A777 is made from premium high speed cobalt material which means it can be used for drilling hard materials, including tool steels.
Producing more accurate sized holes with a better finish, the A777 drill really is a great performer.
*Note: 4 Facet Point up to 1.4mm
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