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Drill Bits - Greenfield 550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit, 0.2720 in dia Cutting, 4.125 in OAL, Letter I, 46779

- Walter Surface Technologies / Jobber Drills

Drill Bits - Greenfield 550 NAS-Type Heavy-Duty Cobalt Straw Jobber-Length Drill Bit, 0.2720 in dia Cutting, 4.125 in OAL, Letter I, 46779

SKU: 14604-46779
$5.62 CAD $11.24 CAD
11 in stock
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Item #: 46779

This heavy-duty jobber drill bit is manufactured to NAS 907 Type J aerospace specifications, ensuring high accuracy and dependable performance in demanding drilling applications. It is designed for drilling tough, high-tensile, and work-hardening materials commonly encountered in professional machining and industrial environments.

Constructed from premium cobalt high-speed steel, this drill bit offers superior heat resistance and extended tool life when working with harder metals. The straw finish improves lubricity during cutting and also allows for easy visual identification of cobalt drill bits.

The 135° P3 split point is self-centering, helping to reduce thrust and improve drilling accuracy while allowing for easier penetration into the workpiece. 

Specifications

  • Standard: NAS 907 Type J

  • Material: Cobalt High-Speed Steel

  • Finish: Straw

  • Point Type: 135° P3 Split Point (sizes under 0.0625 in do not include split point)

  • Construction: Heavy-Duty

  • Designed For: Tough, High-Tensile, and Work-Hardening Materials

Ideal for professional machining and industrial drilling applications where durability, heat resistance, and precision are required.