This jobber length drill bit is made of carbide and has a 5/16 inch diameter, 1⅜ inch long shank. It is for use with aluminum, brass, bronze, cast iron, copper, and meets ASME standards. This 1727 series jobber length 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 2⅜ inch spiral flutes, a straight shank, and 118 Degrees 4 facet point drill point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.3125
Material - MachiningCarbide
Drill Bit Point Angle118 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length2 3/8 in
Helix Angle10 Degrees /20 Degrees
Spiral DirectionRight Hand
Shank Dia.5/16 in
Overall Length4 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsASME B94.11M-1993
Drill Diameter Tolerance+0.0000 in/-0.0010 in
Web ThinningThinned
Primary Material Application ISO CodeK, N
Drill Bit Size5/16 in
Measurement SystemFractional Inch
Finish - MachiningBright (Uncoated)
Drill Bit Point Type4 Facet Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth1 1/4 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1 3/8 in
Depth:Dia. Ratio4xD
Drill Point Length0.0939 in
Series1727
Aircraft DrillNo
Sheeter DrillNo
Primary Material ApplicationAluminum, Brass, Bronze, Cast Iron, Copper
List Number1727
Country of OriginUnited States
(subject to change)