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
    A78135 ACT 1/16 7/8 1-7/8 135° 2 1 Gold Oxide 38
    $3.75
  • A78134 ACT #52 7/8 1-7/8 135° 2 1 Gold Oxide 62
    $3.75
  • A46507 ACT A 2-5/8 3-7/8 135° 2 12 Straw Finish 100
    $5.61
  • A46427 ACT #1 2-5/8 3-7/8 135° 2 12 Straw Finish 100
    $5.65
  • A45709 ACT A 1-5/16 2-7/16 135° 2 12 Straw Finish 100
    $5.44
  • A45649 ACT #1 1-5/16 2-7/16 135° 2 12 Straw Finish 100
    $5.24
  • A45620 ACT 1/16 5/8 1-5/8 135° 2 12 Straw Finish 100
    $1.90
  • A78136 ACT 5/64 1 2 135° 2 1 Gold Oxide 38
    $3.75
  • A78133 ACT #51 1 2 135° 2 1 Gold Oxide 100
    $3.75
  • A58527 ACT 1/16 1-7/8 1-7/8 135° 2 12 ALTiN 100
    $3.75
  • A58412 ACT 1/16 5/8 1-5/8 135° 2 12 ALTiN 12
    $3.30
  • A78137 ACT 3/32 1-1/4 2-1/4 135° 2 1 Gold Oxide 24
    $3.75
  • A78132 ACT #50 1 2 135° 2 1 Gold Oxide 50
    $3.75
  • A46508 ACT B 2-3/4 4 135° 2 12 Straw Finish 100
    $6.34
  • A46428 ACT #2 2-5/8 3-7/8 135° 2 12 Straw Finish 100
    $5.65
  • A46398 ACT 1/16 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.27
  • A45710 ACT B 1-3/8 2-1/2 135° 2 12 Straw Finish 86
    $5.77
  • A45650 ACT #2 1-5/16 2-7/16 135° 2 12 Straw Finish 86
    $5.24
  • A45621 ACT 5/64 11/16 1-11/16 135° 2 12 Straw Finish 100
    $1.90
  • A78138 ACT 7/64 1-1/2 2-5/8 135° 2 1 Gold Oxide 100
    $3.91
  • A78131 ACT #49 1 2 135° 2 1 Gold Oxide 38
    $3.75
  • A58528 ACT 5/64 2 2 135° 2 12 ALTiN 100
    $3.75
  • A58413 ACT 5/64 11/16 1-11/16 135° 2 12 ALTiN 50
    $3.30
  • A78139 ACT 1/8 1-5/8 2-3/4 135° 2 1 Gold Oxide 62
    $4.62
  • A78130 ACT #48 1 2 135° 2 1 Gold Oxide 26
    $3.75
  • A46509 ACT C 2-3/4 4 135° 2 12 Straw Finish 100
    $6.34
  • A46429 ACT #3 2-1/2 3-3/4 135° 2 12 Straw Finish 100
    $5.24
  • A46399 ACT 5/64 1 2 135° 2 12 Straw Finish 100
    $2.27
  • A45711 ACT C 1-3/8 2-1/2 135° 2 12 Straw Finish 100
    $5.77
  • A45651 ACT #3 1-1/4 2-3/8 135° 2 12 Straw Finish 100
    $5.24
  • A45622 ACT 3/32 3/4 1-3/4 135° 2 12 Straw Finish 100
    $1.90
  • A78140 ACT 9/64 1-3/4 2-7/8 135° 2 1 Gold Oxide 62
    $4.62
  • A78129 ACT #47 1 2 135° 2 1 Gold Oxide 24
    $3.75
  • A58529 ACT 3/32 2-1/4 2-1/4 135° 2 12 ALTiN 100
    $3.75
  • A58414 ACT 3/32 3/4 1-3/4 135° 2 12 ALTiN Available to Order*
    $3.30
  • A46838 ACT 1/8 1-5/8 6 135° 2 12 Straw Finish 100
    $8.33
  • A78141 ACT 5/32 2 3-1/8 135° 2 1 Gold Oxide 26
    $5.11
  • A78128 ACT #46 1-1/8 2-1/8 135° 2 1 Gold Oxide 38
    $3.75
  • A46510 ACT D 2-3/4 4 135° 2 12 Straw Finish 100
    $7.17
  • A46430 ACT #4 2-1/2 3-3/4 135° 2 12 Straw Finish 100
    $5.24
  • A46400 ACT 3/32 1-1/4 2-1/4 135° 2 12 Straw Finish 100
    $2.27
  • A45712 ACT D 1-3/8 2-1/2 135° 2 12 Straw Finish 100
    $5.77
  • A45652 ACT #4 1-1/4 2-3/8 135° 2 12 Straw Finish 100
    $4.69
  • A45623 ACT 7/64 13/16 1-13/16 135° 2 12 Straw Finish 100
    $2.10
  • A78127 ACT #45 1-1/8 2-1/8 135° 2 1 Gold Oxide 24
    $3.75
  • A78029 ACT 11/64 2-1/8 3-1/4 135° 2 1 Gold Oxide 38
    $5.32
  • A58530 ACT 7/64 2-5/8 2-5/8 135° 2 12 ALTiN 24
    $3.87
  • A58470 ACT #4 1-1/4 2-3/8 135° 2 12 ALTiN 74
    $8.58
  • A58415 ACT 7/64 13/16 1-13/16 135° 2 12 ALTiN 38
    $3.71
  • A78126 ACT #44 1-1/8 2-1/8 135° 2 1 Gold Oxide 100
    $3.75
  • A78030 ACT 3/16 2-5/16 3-1/2 135° 2 1 Gold Oxide 24
    $5.89
  • A46511 ACT E 2-3/4 4 135° 2 12 Straw Finish 100
    $5.24
  • A46431 ACT #5 2-1/2 3-3/4 135° 2 12 Straw Finish 100
    $5.24
  • A46401 ACT 7/64 1-1/2 2-5/8 135° 2 12 Straw Finish 100
    $2.35
  • A45713 ACT E 1-3/8 2-1/2 135° 2 12 Straw Finish 100
    $5.28
  • A45653 ACT #5 1-1/4 2-3/8 135° 2 12 Straw Finish 100
    $4.69
  • A45624 ACT 1/8 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.43
  • A78125 ACT #43 1-1/4 2-1/4 135° 2 1 Gold Oxide 62
    $3.75
  • A78031 ACT 13/64 2-7/16 3-5/8 135° 2 1 Gold Oxide 38
    $7.05
  • A58531 ACT 1/8 2-3/4 2-3/4 135° 2 12 ALTiN 100
    $4.79
  • A58471 ACT #5 1-1/4 2-3/8 135° 2 12 ALTiN 24
    $8.58
  • A58416 ACT 1/8 7/8 1-7/8 135° 2 12 ALTiN 100
    $4.20
  • A78124 ACT #42 1-1/4 2-1/4 135° 2 1 Gold Oxide 86
    $3.75
  • A78032 ACT 7/32 2-1/2 3-3/4 135° 2 1 Gold Oxide 86
    $7.79
  • A46512 ACT F 2-7/8 4-1/8 135° 2 6 Straw Finish 100
    $6.34
  • A46432 ACT #6 2-1/2 3-3/4 135° 2 12 Straw Finish 100
    $5.24
  • A46402 ACT 1/8 1-5/8 2-3/4 135° 2 12 Straw Finish 100
    $2.77
  • A45714 ACT F 1-7/16 2-5/8 135° 2 6 Straw Finish 100
    $6.10
  • A45654 ACT #6 1-1/4 2-3/8 135° 2 12 Straw Finish 100
    $4.69
  • A45625 ACT 9/64 15/16 1-15/16 135° 2 12 Straw Finish 100
    $2.43
  • A78123 ACT #41 1-3/8 2-3/8 135° 2 1 Gold Oxide 50
    $3.75
  • A78033 ACT 15/64 2-5/8 3-7/8 135° 2 1 Gold Oxide 26
    $8.09
  • A58532 ACT 9/64 2-7/8 2-7/8 135° 2 12 ALTiN 62
    $4.79
  • A58472 ACT #6 1-1/4 2-3/8 135° 2 12 ALTiN 26
    $8.58
  • A58417 ACT 9/64 15/16 1-15/16 135° 2 12 ALTiN 26
    $4.20
  • A78122 ACT #40 1-3/8 2-3/8 135° 2 1 Gold Oxide 12
    $3.83
  • A78034 ACT 1/4 2-3/4 4 135° 2 1 Gold Oxide Available to Order*
    $8.82
  • A46513 ACT G 2-7/8 4-1/8 135° 2 6 Straw Finish 100
    $6.34
  • A46433 ACT #7 2-7/16 3-5/8 135° 2 12 Straw Finish 100
    $4.12
  • A46403 ACT 9/64 1-3/4 2-7/8 135° 2 12 Straw Finish 100
    $2.77
  • A45715 ACT G 1-7/16 2-5/8 135° 2 6 Straw Finish 100
    $6.10
  • A45655 ACT #7 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.79
  • A45626 ACT 5/32 1 2-1/16 135° 2 12 Straw Finish 100
    $2.63
  • A78121 ACT #39 1-3/8 2-3/8 135° 2 1 Gold Oxide 62
    $3.83
  • A58588 ACT #7 3-5/8 3-5/8 135° 2 12 ALTiN 50
    $7.42
  • A58533 ACT 5/32 3-1/8 3-1/8 135° 2 12 ALTiN 100
    $5.32
  • A58473 ACT #7 1-3/16 2-1/4 135° 2 12 ALTiN 100
    $6.76
  • A58418 ACT 5/32 1 2-1/16 135° 2 12 ALTiN 100
    $4.62
  • A78120 ACT #38 1-7/16 2-1/2 135° 2 1 Gold Oxide 26
    $3.83
  • A46514 ACT H 2-7/8 4-1/8 135° 2 6 Straw Finish 100
    $7.17
  • A46434 ACT #8 2-7/16 3-5/8 135° 2 12 Straw Finish 100
    $4.12
  • A46404 ACT 5/32 2 3-1/8 135° 2 12 Straw Finish 100
    $3.01
  • A45716 ACT H 1-1/2 2-11/16 135° 2 6 Straw Finish 100
    $6.38
  • A45656 ACT #8 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.79
  • A45627 ACT 11/64 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.97
  • A78119 ACT #37 1-7/16 2-1/2 135° 2 1 Gold Oxide 38
    $3.96
  • A58589 ACT #8 3-5/8 3-5/8 135° 2 12 ALTiN 12
    $7.42
  • A58534 ACT 11/64 3-1/4 3-1/4 135° 2 12 ALTiN 50
    $5.65
  • A58474 ACT #8 1-3/16 2-1/4 135° 2 12 ALTiN 86
    $6.76
  • A58419 ACT 11/64 1-1/16 2-1/8 135° 2 12 ALTiN 38
    $5.24

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

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