This M35 jobber length drill bit is made of cobalt and has a ¼ inch diameter, 1¼ inch long shank. It is for use with steel, titanium, and meets the standards for NAS 907 Type B. This 550ASP-TN series jobber length drill bit has a TiN finish, and has fractional inch measurements. It is non-coolant through with a four-inch length. Plus it has two 2¾ inch spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ItemJobber Length Drill Bit
Decimal Equivalent0.25
Material - MachiningCobalt
Drill Bit Point Angle135 Degrees
Coolant FedNon-Coolant Through
Flute TypeSpiral
Flute Length2 3/4 in
Helix Angle28 Degrees
Spiral DirectionRight Hand
Shank Dia.1/4 in
Overall Length4 in
Drill Length ClassJobber Length
Drill Bit GroupingIndividual
StandardsNAS 907 Type B
Drill Diameter Tolerance+0.0000 in/-0.0007 in
Web ThinningThinned
Primary Material ApplicationStainless Steel, Steel, Titanium
List Number550ASP-TN
Drill Bit Size1/4 in
Measurement SystemFractional Inch
Finish - MachiningTiN
Drill Bit Point TypeSplit Point
Number of Coolant Holes0
Number of Flutes2
Maximum Drilling Depth1 in
Cutting DirectionRight Hand
Shank Type - MachiningStraight
Shank Length1 1/4 in
Depth:Dia. Ratio4xD
Drill Point Length0.0518 in
Series550ASP-TN
Aircraft DrillYes
Sheeter DrillNo
Material Grade - MachiningM35
Primary Material Application ISO CodeM, P, S
Country of OriginUnited States
(subject to change)