This W4 jobber drill bit set is made of high speed steel. It includes a metal drill index, is designed for use with alloy steel, carbon steel, cast iron, and meets ASME standards. This 1898 series jobber length drill bit set has a bright (uncoated) finish, and has fractional inch measurements. It is non-coolant through. Plus it has two spiral flutes, a straight shank, and 118 Degrees radial point drill point.
Technical Specs
ItemJobber Drill Bit Set
Finish - MachiningBright (Uncoated)
Number of Drill Bits21
Drill Bit Point Angle118 Degrees
Flute TypeSpiral
Cutting DirectionRight Hand
Depth:Dia. Ratio4xD
Drill Length ClassJobber Length
Series1898
IncludesMetal Drill Index
Aircraft DrillNo
Drill Diameter Tolerance+0.0000 in/-0.0005 in to +0.0000 in/-0.0010 in
Web ThinningWeb-Thinned
Primary Material ApplicationAlloy Steel, Carbon Steel, Cast Iron
Largest Drill Bit Size3/8 in
Material - MachiningHigh Speed Steel
Measurement SystemFractional Inch
Drill Bit Sizes Included1/16 in, 1/4 in, 1/8 in, 11/32 in, 11/64 in, 13/64 in, 15/64 in, 17/64 in, 19/64 in, 21/64 in, 23/64 in, 3/16 in, 3/32 in, 3/8 in, 5/16 in, 5/32 in, 5/64 in, 7/32 in, 7/64 in, 9/32 in, 9/64 in
Drill Bit Point TypeRadial Point
Number of Flutes2
Spiral DirectionRight Hand
Drill Bit GroupingSet
Shank Type - MachiningStraight
Drill Bit Case TypeMetal Drill Index
StandardsASME B94.11M
Coolant FedNon-Coolant Through
Web ConstructionTapered
Material Grade - MachiningW4
Primary Material Application ISO CodeP, K
Smallest Drill Bit Size1/16 in
Country of OriginUnited States
(subject to change)