Heavy-duty jobber drill bit. High speed construction, 135 degree split point, black and gold finish. Excellent for non-ferrous applications and low tensile steels. For portable drilling and maintenance applications.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.25
Material - MachiningHigh Speed Steel
Drill Bit Point Angle135 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length2 3/4 in
Helix Angle28 Degrees
Spiral DirectionRight Hand
Shank Dia.1/4 in
Overall Length4 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsASME B94.11M
Drill Diameter Tolerance+0.0000 in/-0.0007 in
Web ThinningThinned
Primary Material Application ISO CodeK, P
Drill Bit Size1/4 in
Measurement SystemFractional Inch
Finish - MachiningBlack Oxide
Drill Bit Point TypeSplit Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth1 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight with Three Flats
Shank Length1 1/4 in
Depth:Dia. Ratio4xD
Drill Point Length0.0518 in
Series1878
Aircraft DrillNo
Sheeter DrillNo
Primary Material ApplicationCast Iron, Steel
List Number1878
Country of OriginUnited States
(subject to change)