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Dormer Pramet A7238.0X117 (MID 7189825) is a spot weld drill with 8.00mm cutting diameter, 117mm overall length, and 24mm flute length. Made from Cobalt High Speed Steel (HSS-E) with Bronze coating and steam tempered surface treatment. Standard spiral flute geometry with cylindrical shank. Right-hand cutting direction. DIN standard DORMER. For steel and cast steel (P).
MODEL 7189825
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Spot-weld-drilling 180°
Basic Standard
DORMER
Coating
Bronze
Connection (shank) description
Cylindrical shank
Connection diameter - millimeter (DCON MS)
8
Cutting diameter - inch (DC)
0.315
Cutting diameter - millimeter (DC)
8
Cutting diameter tolerance class (TCDC)
h8
EDP number
47189825
Hand (Cutting direction)
Right
Length chip flute - inch (LCF)
0.9449
Length chip flute - millimeter (LCF)
24
Material
HSS-E
Material application
P - Steel and cast steel
MID number
7189825
Ordering code ANSI
A7238.0X117
Overall length - inch (OAL)
4.6063
Overall length - millimeter (OAL)
117
Spiral form
Standard Spiral
Surface treatement
Steam Tempered
Usable length (ULDR)
1
The A723 is a spot weld drill bit, so it is used to remove or “drill out” spot welded areas.
It has a lip and spur point which is specially designed for that task and is available in most common sizes, commonly for removing welds in a vehicle repair shop so the panels can be released and repaired.
It has a short flute length to make it more sturdy and less prone to shatter when being used in a hand held device whilst the bronze oxide finish makes sure workpiece material does not stick to the tool.
Manufactured from High Speed cobalt, the A723 can also be used for drilling hardened steel as a result of spot welding
