This general purpose jobber length drill bit is made of high speed steel and has a ¼ inch diameter, 1¼ inch long shank. It is for use with aluminum, composite, copper, slate, steel, wood, and meets ANSI standards. This 150B series jobber drill bit has a bright (uncoated) finish, and has fractional inch measurements. It is non-coolant through with a four-inch length. Plus it has two 2¾ inch spiral flutes, a straight shank, and 118 Degrees conventional point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.25
Material - MachiningHigh Speed Steel
Drill Bit Point Angle118 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length2 3/4 in
Helix Angle40 Degrees
Spiral DirectionRight Hand
Shank Dia.1/4 in
Overall Length4 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsANSI
Drill Diameter Tolerance+0.0000 in/-0.0007 in
Web ConstructionTapered
Material Grade - MachiningGeneral Purpose
Primary Material Application ISO CodeN, O, P
Drill Bit Size1/4 in
Measurement SystemFractional Inch
Finish - MachiningBright (Uncoated)
Drill Bit Point TypeConventional Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth1 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1 1/4 in
Depth:Dia. Ratio4xD
Drill Point Length0.0751 in
Series150B
Aircraft DrillNo
Sheeter DrillNo
Web ThinningWeb-Thinned
Primary Material ApplicationAluminum, Composite, Copper, Slate, Steel, Wood