This M42 jobber length drill bit is made of cobalt and has a 5/32 inch diameter, 1⅛ inch long shank. It is for use with steel, tool and die steel, and meets the standards for NAS 907 Type J. This 55TN series jobber length drill bit has a TiN finish, and has wire measurements. It is non-coolant through with a 3¼ inch length. Plus it has two 2⅛ inch spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.159
Material - MachiningCobalt
Drill Bit Point Angle135 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length2 1/8 in
Helix Angle28 Degrees
Spiral DirectionRight Hand
Shank Dia.5/32 in
Overall Length3 1/4 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsNAS 907 Type J
Drill Diameter Tolerance+0.0000 in/-0.0007 in
Web ThinningThinned
Primary Material ApplicationStainless Steel, Steel, Tool and Die Steel
List Number2550
Drill Bit Size#21
Measurement SystemWire
Finish - MachiningTiN
Drill Bit Point TypeSplit Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth5/8 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1 1/8 in
Depth:Dia. Ratio4xD
Drill Point Length0.0329 in
Series55TN
Aircraft DrillYes
Sheeter DrillNo
Material Grade - MachiningM42
Primary Material Application ISO CodeM, P
Country of OriginUnited States
(subject to change)