This heavy-duty screw machine drill bit is made of high speed steel and has a 5/16 inch diameter, 1¼ inch long shank. It is for use with cast iron, steel, tool and die steel. This 159 series screw machine length drill bit has a black oxide finish, and has letter measurements. It is non-coolant through with a 2 15/16 inch length. Plus it has two 1 11/16 inch spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ItemScrew-Machine Length Drill Bit
Decimal Equivalent0.316
Material - MachiningHigh Speed Steel
Drill Bit Point Angle135 Degrees
Flute TypeSpiral
Flute Length1 11/16 in
Helix Angle28 Degrees
Spiral DirectionRight Hand
Shank Dia.5/16 in
Overall Length2 15/16 in
Drill Length ClassScrew Machine Length
Coolant FedNon-Coolant Through
Series159
Drill Diameter Tolerance+0.0000 in/-0.0010 in
Primary Material ApplicationCast Iron, Steel, Tool and Die Steel