This jobber length drill bit is made of high speed steel and has a 5/16 inch diameter, one-inch long shank. It is for use with aluminum, brass, bronze, composite, copper, steel, wood. This jobber length drill bit has a black oxide finish, and has fractional inch measurements. It is non-coolant through with a 4½ inch length. Plus it has two 3½ inch spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.3125
Material - MachiningHigh Speed Steel
Drill Bit Point Angle135 Degrees
Coolant FedNon-Coolant Through
Number of Flutes2
Maximum Drilling Depth3 1/2 in
Spiral DirectionRight Hand
Shank Dia.5/16 in
Overall Length4 1/2 in
Drill Length ClassJobber Length
StandardsNot Rated
Primary Material Application ISO CodeN, O, P
Drill Bit Size5/16 in
Measurement SystemFractional Inch
Finish - MachiningBlack Oxide
Drill Bit Point TypeSplit Point
Flute TypeSpiral
Flute Length3 1/2 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1.0000 in
Depth:Dia. Ratio11xD
Drill Bit GroupingIndividual
Primary Material ApplicationAluminum, Brass, Bronze, Composite, Copper, Steel, Wood