Attributes

Key Value
Aircraft DrillNo
Coolant FedNon-Coolant Through
Cutting DirectionRight Hand
Decimal Equivalent0.2570
Depth:Dia. Ratio4xD
Double MarginNo
Drill Bit GroupingIndividual
Drill Bit Point Angle135 Degrees
Drill Bit Point TypeSplit Point
Drill Bit SizeF
Drill Diameter Tolerance+0.0000 in /-0.0010 in
Drill Length ClassJobber Length
Drill Point Length0.0000 in
Finish - MachiningBlack Oxide
Flute Length2 7/8 in
Flute TypeSpiral
Helix Angle28 Degrees
ItemJobber Length Drill Bit
Material - MachiningHigh Speed Steel
Material Grade - Machin.High Performance
Maximum Drilling Depth1 1/64 in
Measurement SystemLetter
Number of Coolant Holes0
Number of Flutes2
Overall Length4 1/8 in
Primary Material Applic.Cast Iron, Steel
Primary Material Applic.K, P
Series1878
Shank Dia.1/4 in
Shank Length1 1/4 in
Shank Type - MachiningStraight
Sheeter DrillNo
Spiral DirectionRight Hand
StandardsASME B94.11M
Web ConstructionTapered
Web ThinningWeb-Thinned
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