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Dormer Pramet A77721/64 5971006 21/64" (8.33mm) jobber length drill with 135° split point, bronze coating, and steam tempered surface treatment. Cobalt High Speed Steel (HSS-E) construction with standard spiral flute geometry and cylindrical shank. Conforms to DIN 338. Suitable for cast iron, steel, and high-temperature alloys.
MODEL 5971006
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Drill point 135°
Basic Standard
DIN 338
Coating
Bronze
Connection (shank) description
Cylindrical shank
Connection diameter - inch (DCON MS)
0.328
Connection diameter - millimeter (DCON MS)
8.33
Cutting diameter - fractional inch (DC)
21/64
Cutting diameter - inch (DC)
0.3281
Cutting diameter - millimeter (DC)
8.33
Cutting diameter tolerance class (TCDC)
h8
Drill Length
Jobber
EDP number
374924
Hand (Cutting direction)
Right
Length chip flute - inch (LCF)
2.9528
Length chip flute - millimeter (LCF)
75
Material
HSS-E
Material application
K - Cast iron, P - Steel and cast steel, S - High-temperature alloys
MID number
5971006
Ordering code ANSI
A77721/64
Overall length - inch (OAL)
4.6063
Overall length - millimeter (OAL)
117
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
| Brand | Pramet |
| Model | 7229789 |
