This high-performance jobber length drill bit is made of high speed steel and has a 5/16 inch diameter, 2 13/16 inch long shank. It is for use with aluminum, brass, bronze, copper, steel, and meets the standards for NAS 907 Type B. This 3957-6 series jobber drill bit has a bright (uncoated) finish, and has fractional inch measurements. It is non-coolant through with a six-inch length. Plus it has two 3 3/16 inch spiral flutes, a straight shank, and a 135 Degrees split point.
Technical Specs
ArticleForet court
Équivalent décimal0,3125 po
Material - MachiningHigh Speed Steel
Angle de pointe du foret135 Degrees
Alimentation en liquide de refroidissementSans alimentation en liquide de refroidissement
Number of Flutes2
Maximum Drilling Depth1 1/4 in
Direction de coupeDroite
Shank Type - MachiningStraight
Shank Length2 13/16 in
Rapport profondeur x dia.4xD
Drill Point Length0.0647 in
Series3957-6
Aircraft DrillYes
Material Grade - MachiningHigh Performance
Primary Material Application ISO CodeN, P
Taille de foret5/16 po
Measurement SystemFractional Inch
Finish - MachiningBright (Uncoated)
Drill Bit Point TypeSplit Point
Flute TypeSpiral
Longueur de goujure3-3/16 po
Helix Angle21 Degrees /34 Degrees
Spiral DirectionRight Hand
Diamètre de tige5/16 po
Longueur hors tout6 po
Drill Length ClassJobber Length
Groupe de foretsIndividuel
NormesNAS 907 type B
Drill Diameter Tolerance+0.0000 in/-0.0010 in
Primary Material ApplicationAluminum, Brass, Bronze, Copper, Steel