This W4 jobber drill bit set is made of high speed steel. It includes case and sizes #21, #25, #29, #36, #7, 27/64 inch, 5/16 inch, F, U, is designed for use with all materials, and meets ASME standards. This 1878 series jobber length drill bit set has a black oxide finish, and has wire measurements. It is non-coolant through. Plus it has 2, 3, 4 spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ItemDrill and Tap Set
Finish - MachiningBlack, Gold
Number of Drill Bits9
Drill Bit Point Angle135 Degrees
Flute TypeSpiral
Cutting DirectionRight Hand
Depth:Dia. Ratio4xD
Drill Length ClassJobber Length
Series1878
IncludesCase
Aircraft DrillNo
Drill Diameter Tolerance+0.0000/-0.0005 in to +0.0000/-0.0010 in
Web ThinningWeb-Thinned
Primary Material ApplicationAll Materials
Drill Bit Size#36, #29, #25, #21, #7, F, 5/16 in, U, 27/64 in
Smallest Drill Bit Size#36
Material - MachiningHigh Speed Steel
Measurement SystemImperial
Drill Bit Sizes Included#36, #29, #25, #21, #7, F, 5/16 in, U, 27/64 in
Drill Bit Point TypeSplit Point
Number of Flutes2, 3, 4
Spiral DirectionRight Hand
Drill Bit GroupingSet
Shank Type - MachiningStraight
Drill Bit Case TypeMetal Index
StandardsASME B94.11M
Coolant FedNon-Coolant Through
Web ConstructionTapered
Material Grade - MachiningW4
Primary Material Application ISO CodeP
Largest Drill Bit Size27/64 in
Country of OriginUnited States
(subject to change)