This jobber length drill bit is made of high speed steel and has a 15/64 inch diameter, 1¼ inch long shank. It is for use with cast iron, steel, and meets ASME standards. This 1878 series jobber length drill bit has a black oxide finish, and has letter measurements. It is non-coolant through with a four-inch length. Plus it has two 2¾ inch spiral flutes, straight shank with three flats, right hand cutting direction, and a 135 Degrees split point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.242
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.15/64 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 SizeC
Measurement SystemLetter
Finish - MachiningBlack Oxide
Drill Bit Point TypeSplit Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth61/64 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight with Three Flats
Shank Length1 1/4 in
Depth:Dia. Ratio4xD
Drill Point Length0.0000 in
Series1878
Aircraft DrillNo
Sheeter DrillNo
Primary Material ApplicationCast Iron, Steel
List Number1878
Country of OriginUnited States
(subject to change)