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Dormer Pramet A7775.5 (MID 5971138) is a 5.50mm jobber length drill with split point, conforming to DIN 338. Made from Cobalt High Speed Steel (HSS-E) with a Bronze coating and steam tempered surface. Features a 135° point angle, standard spiral flute, and cylindrical shank. Overall length 93mm, flute length 57mm. Suitable for steel, cast iron, and high-temperature alloys.
MODEL 5971138
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$6.28 Each
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Drill point 135°
Basic Standard
DIN 338
Coating
Bronze
Connection (shank) description
Cylindrical shank
Connection diameter - millimeter (DCON MS)
5.5
Cutting diameter - inch (DC)
0.2165
Cutting diameter - millimeter (DC)
5.5
Cutting diameter tolerance class (TCDC)
h8
Drill Length
Jobber
EDP number
375259
Hand (Cutting direction)
Right
Length chip flute - inch (LCF)
2.2441
Length chip flute - millimeter (LCF)
57
Material
HSS-E
Material application
K - Cast iron, P - Steel and cast steel, S - High-temperature alloys
MID number
5971138
Ordering code ANSI
A7775.5
Overall length - inch (OAL)
3.6614
Overall length - millimeter (OAL)
93
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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