This general purpose jobber length drill bit is made of high speed steel and has a 5/16 inch diameter, 1 5/16 inch long shank. It is for use with aluminum, brass, bronze, cast iron, copper, steel, and meets ASME standards. This 1899 series jobber drill bit has a black oxide finish, and has fractional inch measurements. It is non-coolant through with a 4⅝ inch length. Plus it has two 3 5/16 inch spiral flutes, a straight shank, and 118 Degrees conventional point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.3281
Material - MachiningHigh Speed Steel
Drill Bit Point Angle118 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length3 5/16 in
Helix Angle21 Degrees /34 Degrees
Spiral DirectionRight Hand
Shank Dia.5/16 in
Overall Length4 5/8 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsASME B94.11M
Drill Diameter Tolerance+0.0000 in/-0.0010 in
Web ThinningThinned
Primary Material ApplicationAluminum, Brass, Bronze, Cast Iron, Copper, Steel