Cobalt Drill Bits

Cobalt Drill Bits

Cobalt Extension Aircraft Drills
Cobalt Extension Aircraft Drills
Cobalt Jobber Length Drills
Cobalt Jobber Length Drills
Cobalt Screw Machine Drills Stub Length
Cobalt Screw Machine Drills Stub Length

Cobalt drill bits are a go-to choice for drilling stainless steel, titanium, and other tough alloys where standard HSS wears out too quickly but full carbide isn't necessary or practical. We stock Cobalt Jobber Length Drills, Cobalt Screw Machine (Stub) Length Drills, and Cobalt Extension Aircraft Drills for reaching into deeper holes.

Cobalt's added heat resistance over standard HSS helps it maintain a sharper edge at the higher temperatures generated when drilling harder materials. All Cobalt drill bits are USA manufactured and stocked for same-day shipping.

  • Compare SKU Vendor Size (D1) Shank Diameter (D2) Flute Length (L2) Overall Length (L1) Shank Style Point Angle Number of Flutes Morse Taper Included Angle (A) Package Qty Coating In Stock Price Quantity
    A46847 ACT #1 2-5/8 6 135° 2 12 Straw Finish 100
    $17.85
  • A46848 ACT #2 2-5/8 6 135° 2 12 Straw Finish 62
    $17.85
  • A78041 ACT 23/64 3-1/2 4-7/8 135° 2 1 Gold Oxide 38
    $18.81
  • A78042 ACT 3/8 3-5/8 5 135° 2 1 Gold Oxide 44
    $18.81
  • A78043 ACT 25/64 3-3/4 5.1250 135° 2 1 Gold Oxide 32
    $21.36
  • A78044 ACT 13/32 3-7/8 5-1/4 135° 2 1 Gold Oxide 24
    $22.10
  • A58570 ACT O 4-1/2 4-1/2 135° 2 6 ALTiN 44
    $17.28
  • A58571 ACT P 4-5/8 4-5/8 135° 2 6 ALTiN 44
    $17.93
  • A46845 ACT 15/64 2-5/8 6 135° 2 12 Straw Finish 26
    $17.06
  • A58572 ACT Q 4-3/4 4-3/4 135° 2 6 ALTiN 20
    $18.22
  • A58457 ACT Q 1-11/16 3 135° 2 6 ALTiN 26
    $18.06
  • A58573 ACT R 4-3/4 4-3/4 135° 2 6 ALTiN 38
    $18.18
  • A58458 ACT R 1-11/16 3 135° 2 6 ALTiN 24
    $18.06
  • A58574 ACT S 4-7/8 4-7/8 135° 2 6 ALTiN 18
    $22.38
  • A58545 ACT 11/32 4-3/4 4-3/4 135° 2 6 ALTiN 38
    $17.57
  • A58459 ACT S 1-3/4 3-1/16 135° 2 6 ALTiN 24
    $22.52
  • A58575 ACT T 4-7/8 4-7/8 135° 2 6 ALTiN 6
    $23.54
  • A58546 ACT 23/64 4-7/8 4-7/8 135° 2 6 ALTiN 20
    $19.01
  • A58460 ACT T 1-3/4 3-1/16 135° 2 6 ALTiN 20
    $22.52
  • A58431 ACT 23/64 1-3/4 3-1/16 135° 2 6 ALTiN 38
    $17.28
  • A58576 ACT U 5 5 135° 2 6 ALTiN 38
    $23.54
  • A58547 ACT 3/8 5 5 135° 2 6 ALTiN 100
    $19.01
  • A58461 ACT U 1-13/16 3-1/8 135° 2 6 ALTiN 32
    $22.52
  • A58432 ACT 3/8 1-13/16 3-1/8 135° 2 6 ALTiN 100
    $17.28
  • A58548 ACT 25/64 5-1/8 5-1/8 135° 2 6 ALTiN 18
    $22.46
  • A58433 ACT 25/64 1-7/8 3-1/4 135° 2 6 ALTiN 20
    $19.87
  • A58549 ACT 13/32 5-1/4 5-1/4 135° 2 6 ALTiN 24
    $22.97
  • A58434 ACT 13/32 1-15/16 3-5/16 135° 2 6 ALTiN 50
    $21.77
  • A46423 ACT 29/64 4-3/16 5-5/8 135° 2 6 Straw Finish 100
    $17.98
  • A46424 ACT 15/32 4-5/16 5-3/4 135° 2 6 Straw Finish Available to Order*
    $18.47
  • A46425 ACT 31/64 4-3/8 5-7/8 135° 2 6 Straw Finish 100
    $18.63
  • A46426 ACT 1/2 4-1/2 6 135° 2 6 Straw Finish 100
    $18.63

* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.

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