550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit, 0.2770 in dia Cutting, 4.125 in OAL, Letter J

Chicago-Latrobe® 550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bits

Description

  • Manufactured to NAS 907 Type J geometry aerospace specifications
  • Heavy-duty construction for drilling in tough, high-tensile, and work-hardening materials
  • Manufactured from premium cobalt high-speed steel
  • Straw finish adds lubricity and easily identifies cobalt drills
  • 135° P3 split point is self-centering for reduced thrust and easier penetration

Specification

No. of Flutes

2

Applicable Materials

Alloy Steel; Stainless Steel; Titanium; Tool Steel

Bit Length

4.125 in

Cutting Diam [Nom]

0.2770 in

Dia. [Nom]

Letter J

Coating

Straw

Finish

Straw

Flute Length

2.875 in

Overall Length [Nom]

4.125 in

Material

HSS-CO 8% (M42)

Point Angle

135° RHS/RHC

Shank Type

Straight

Type

Style 550

Brand