21/64" Quick Change Hex Shank Drill Bit | Cobalt | COHEX21/64 (6 / Pkg.)
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21/64" Quick Change Hex Shank Drill Bit | Cobalt | COHEX21/64 (6 / Pkg.)

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21/64" Quick Change Hex Shank Drill Bit | Cobalt | COHEX21/64 (6 / Pkg.)

Drill AmericaSKU: COHEX21/64
Price:
$41.87 $74.70per 6( $6.98 each)
Pieces 6
Measurement type Inch
Diameter 21/64"
Length 4-5/8
Material Cobalt
Finish Gold
Flute length 3-5/16
Point type Split Point
Shank Hex
Size 21/64
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

Specs

  • Quantity: 6-piece set
  • Diameter: 21/64 in (0.328125 in) / 8.34 mm
  • Material: Cobalt steel alloy
  • Shank: Hex
  • Style: Quick-change hex shank drill bit
  • Bit type: Drill bit

Features

  • Cobalt alloy provides greater hardness and heat tolerance, improving edge retention when drilling through hard metals such as stainless steel and alloy steels
  • Hex shank reduces slippage in hex-driven chucks and minimizes wobble during operation
  • Durable construction supports longer tool life under high-temperature drilling conditions
  • Designed for metalworking and fabrication tasks requiring medium-diameter holes in tough materials
  • Use scenarios: pilot holes in stainless steel, drilling through cast iron, and enlarging holes in hard alloys
  • Practical tips: apply cutting fluid or oil to manage heat, clamp work securely, and use steady feed to improve hole quality

Physical

  • Packaged as a 6-piece set
  • Shank type: Hex (suitable for hex chucks and related fastening systems)
  • Design supports quick-change style use when paired with appropriate hex-driven tooling

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

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