21/64" Stub Drill Bit | Cobalt | Split Point | D/ASTCO21/64 (6 / Pkg.)
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21/64" Stub Drill Bit | Cobalt | Split Point | D/ASTCO21/64 (6 / Pkg.)

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21/64" Stub Drill Bit | Cobalt | Split Point | D/ASTCO21/64 (6 / Pkg.)

Drill AmericaSKU: D/ASTCO21/64
Price:
$32.64per 6( $5.44 each)
Pieces 6
Measurement type Inch
Diameter 21/64"
Length 2-15/16
Material Cobalt
Finish Gold
Point type Split Point
Shank Round
Weight 1.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

[6 PKG] 21/64" Cobalt Split Point Stub Drill Bit is a cobalt-alloy high-speed steel bit designed for demanding metalworking tasks. This description provides the key specs, practical features, and physical attributes to help you evaluate its fit for your projects.

Specs

  • Diameter: 21/64 in (0.3281 in)
  • Material: HSS cobalt alloy (cobalt‑enhanced high‑speed steel)
  • Tip: Split point for self-centering start
  • Length: Stub drill length (short overall length)
  • Pack: 6 pieces per package

Features

  • Split-point tip: Self-centering and reduces walking when starting holes, minimizing need for center punching
  • Cobalt alloy: Improves red-hardness and heat resistance for sustained cutting life in hard metals
  • Stub length: Increased rigidity and reduced deflection in tight spaces or plunging work
  • Chipping and heat management: Flute geometry supports efficient chip evacuation and temperature control during drilling
  • Metalworking priority: Well-suited for stainless steel, hardened alloys, cast iron, and other tough metals

Physical

  • Pack size: 6 bits per package
  • Bit construction: Cobalt‑based HSS construction with a stub geometry for rigidity
  • Intended use scenario: Precision drilling in metalworking environments where starting accuracy and heat resistance matter

Can We Help?

If you’re not sure that this product is right for you, give us a call!
800-222-0324

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