This W4 jobber length drill bit is made of high speed steel and has a ⅛ inch diameter, 1⅛ inch long shank. It is for use with aluminum, brass, bronze, cast iron, copper, steel, and meets ASME standards. This 1898T series jobber length drill bit has a TiN finish, and has wire measurements. It is non-coolant through with a 2⅞ inch length. Plus it has two 1¾ inch spiral flutes, a straight shank, and 118 Degrees conventional point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.1405
Material - MachiningHigh Speed Steel
Drill Bit Point Angle118 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length1 3/4 in
Helix Angle21 Degrees /34 Degrees
Spiral DirectionRight Hand
Shank Dia.1/8 in
Overall Length2 7/8 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsASME B94.11M
Drill Diameter Tolerance+0.0000 in/-0.0007 in
Web ConstructionTapered
Material Grade - MachiningW4
Primary Material Application ISO CodeK, N, P
Drill Bit Size#28
Measurement SystemWire
Finish - MachiningTiN
Drill Bit Point TypeConventional Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth35/64 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1 1/8 in
Depth:Dia. Ratio4xD
Drill Point Length0.0422 in
Series1898T
Aircraft DrillNo
Sheeter DrillNo
Web ThinningWeb-Thinned
Primary Material ApplicationAluminum, Brass, Bronze, Cast Iron, Copper, Steel