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
    A58435 ACT 27/64 2 3-3/8 135° 2 6 ALTiN 68
    $24.13
  • A78145 ACT #4 2-1/2 3-3/4 135° 2 1 Gold Oxide 38
    $8.82
  • A46531 ACT Y 3-7/8 5-1/4 135° 2 6 Straw Finish 6
    $15.10
  • A46451 ACT #25 1-7/8 3 135° 2 12 Straw Finish 100
    $2.97
  • A46421 ACT 27/64 3-15/16 5-3/8 135° 2 6 Straw Finish 100
    $14.72
  • A45733 ACT Y 1-15/16 3-5/16 135° 2 6 Straw Finish 100
    $13.65
  • A45673 ACT #25 1 2-1/16 135° 2 12 Straw Finish 100
    $2.63
  • A45644 ACT 7/16 1-1/16 3-7/16 135° 2 6 Straw Finish 100
    $13.49
  • A78144 ACT #3 2-1/2 3-3/4 135° 2 1 Gold Oxide 26
    $8.82
  • A58606 ACT #25 3 3 135° 2 12 ALTiN 74
    $5.24
  • A58580 ACT Y 5-1/4 5-1/4 135° 2 6 ALTiN 12
    $27.54
  • A58551 ACT 7/16 5-1/2 5-1/2 135° 2 6 ALTiN 32
    $27.50
  • A58491 ACT #25 1 2-1/16 135° 2 12 ALTiN 100
    $4.62
  • A58465 ACT Y 1-15/16 3-5/16 135° 2 6 ALTiN 18
    $25.03
  • A58436 ACT 7/16 1-1/16 3-7/16 135° 2 6 ALTiN 68
    $24.74
  • A78143 ACT #2 2-5/8 3-7/8 135° 2 1 Gold Oxide 62
    $9.32
  • A46532 ACT Z 3-7/8 5-1/4 135° 2 6 Straw Finish 100
    $16.33
  • A46452 ACT #26 1-7/8 3 135° 2 12 Straw Finish 100
    $2.89
  • A46422 ACT 7/16 4-1/16 5-1/2 135° 2 6 Straw Finish 100
    $15.04
  • A45734 ACT Z 2 3-3/8 135° 2 6 Straw Finish 32
    $15.79
  • A45674 ACT #26 1 2-1/16 135° 2 12 Straw Finish 62
    $2.63
  • A45645 ACT 29/64 2-1/8 3-9/16 135° 2 6 Straw Finish 62
    $16.33
  • A78142 ACT #1 2-5/8 3-7/8 135° 2 1 Gold Oxide 38
    $9.32
  • A58607 ACT #26 3 3 135° 2 12 ALTiN 12
    $5.20
  • A58581 ACT Z 5-1/4 5-1/4 135° 2 6 ALTiN 18
    $29.94
  • A58552 ACT 29/64 5-5/8 5-5/8 135° 2 6 ALTiN 32
    $32.86
  • A58492 ACT #26 1 2-1/16 135° 2 12 ALTiN 26
    $4.62
  • A58466 ACT Z 2 3-3/8 135° 2 6 ALTiN 50
    $27.50
  • A58437 ACT 29/64 2-1/8 3-9/16 135° 2 6 ALTiN 24
    $29.73
  • A46453 ACT #27 1-7/8 3 135° 2 12 Straw Finish 100
    $2.89
  • A46423 ACT 29/64 4-3/16 5-5/8 135° 2 6 Straw Finish 100
    $17.98
  • A45675 ACT #27 1 2-1/16 135° 2 12 Straw Finish 100
    $2.63
  • A45646 ACT 15/32 2-1/8 3-5/8 135° 2 6 Straw Finish 100
    $16.33
  • A58608 ACT #27 3 3 135° 2 12 ALTiN 100
    $5.20
  • A58553 ACT 15/32 5-3/4 5-3/4 135° 2 6 ALTiN 24
    $33.56
  • A58493 ACT #27 1 2-1/16 135° 2 12 ALTiN 12
    $4.62
  • A58438 ACT 15/32 2-1/8 3-5/8 135° 2 6 ALTiN 20
    $29.73
  • A46454 ACT #28 1-3/4 2-7/8 135° 2 12 Straw Finish 100
    $2.77
  • A46424 ACT 15/32 4-5/16 5-3/4 135° 2 6 Straw Finish Available to Order*
    $18.47
  • A45676 ACT #28 15/16 1-15/16 135° 2 12 Straw Finish 100
    $2.43
  • A45647 ACT 31/64 2-3/16 3-11/16 135° 2 6 Straw Finish 100
    $16.33
  • A58609 ACT #28 2-7/8 2-7/8 135° 2 12 ALTiN 24
    $4.83
  • A58554 ACT 31/64 5-7/8 5-7/8 135° 2 6 ALTiN 18
    $33.73
  • A58494 ACT #28 15/16 1-15/16 135° 2 12 ALTiN 38
    $4.20
  • A58439 ACT 31/64 2-3/16 3-11/16 135° 2 6 ALTiN 20
    $29.73
  • A46455 ACT #29 1-3/4 2-7/8 135° 2 12 Straw Finish 100
    $2.69
  • A46425 ACT 31/64 4-3/8 5-7/8 135° 2 6 Straw Finish 100
    $18.63
  • A45677 ACT #29 15/16 1-15/16 135° 2 12 Straw Finish 100
    $2.43
  • A45648 ACT 1/2 2-1/4 3-3/4 135° 2 6 Straw Finish 100
    $16.33
  • A58610 ACT #29 2-7/8 2-7/8 135° 2 12 ALTiN 86
    $4.66
  • A58555 ACT 1/2 6 6 135° 2 6 ALTiN 38
    $33.02
  • A58495 ACT #29 15/16 1-15/16 135° 2 12 ALTiN 26
    $4.20
  • A58440 ACT 1/2 2-1/4 3-3/4 135° 2 6 ALTiN 56
    $29.73
  • A46456 ACT #30 1-5/8 2-3/4 135° 2 12 Straw Finish 100
    $2.59
  • A46426 ACT 1/2 4-1/2 6 135° 2 6 Straw Finish 100
    $18.63
  • A45678 ACT #30 15/16 1-15/16 135° 2 12 Straw Finish 100
    $2.35
  • A58611 ACT #30 2-3/4 2-3/4 135° 2 12 ALTiN 100
    $4.42
  • A58496 ACT #30 15/16 1-15/16 135° 2 12 ALTiN 24
    $3.96
  • A46457 ACT #31 1-5/8 2-3/4 135° 2 12 Straw Finish 100
    $2.51
  • A45679 ACT #31 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.35
  • A58612 ACT #31 2-3/4 2-3/4 135° 2 12 ALTiN Available to Order*
    $4.38
  • A58497 ACT #31 7/8 1-7/8 135° 2 12 ALTiN 24
    $3.96
  • A46458 ACT #32 1-5/8 2-3/4 135° 2 12 Straw Finish 100
    $2.51
  • A45680 ACT #32 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.35
  • A58613 ACT #32 2-3/4 2-3/4 135° 2 12 ALTiN 12
    $4.28
  • A58498 ACT #32 7/8 1-7/8 135° 2 12 ALTiN 100
    $3.96
  • A46459 ACT #33 1-1/2 2-5/8 135° 2 12 Straw Finish 100
    $2.43
  • A45681 ACT #33 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.31
  • A58614 ACT #33 2-5/8 2-5/8 135° 2 12 ALTiN 12
    $4.12
  • A58499 ACT #33 7/8 1-7/8 135° 2 12 ALTiN 38
    $3.83
  • A46460 ACT #34 1-1/2 2-5/8 135° 2 12 Straw Finish 100
    $2.43
  • A45682 ACT #34 7/8 1-7/8 135° 2 12 Straw Finish 100
    $2.31
  • A58615 ACT #34 2-5/8 2-5/8 135° 2 12 ALTiN 12
    $4.12
  • A58500 ACT #34 7/8 1-7/8 135° 2 12 ALTiN 12
    $3.83
  • A46461 ACT #35 1-1/2 2-5/8 135° 2 12 Straw Finish 100
    $2.43
  • A45683 ACT #35 7/8 1-7/8 135° 2 12 Straw Finish Available to Order*
    $2.31
  • A58616 ACT #35 2-5/8 2-5/8 135° 2 12 ALTiN 24
    $4.12
  • A58501 ACT #35 7/8 1-7/8 135° 2 12 ALTiN 12
    $3.83
  • A46462 ACT #36 1-7/16 2-1/2 135° 2 12 Straw Finish 100
    $2.39
  • A45684 ACT #36 13/16 1-13/16 135° 2 12 Straw Finish 100
    $2.31
  • A58617 ACT #36 2-1/2 2-1/2 135° 2 12 ALTiN 24
    $4.08
  • A58502 ACT #36 13/16 1-13/16 135° 2 12 ALTiN 62
    $3.83
  • A46463 ACT #37 1-7/16 2-1/2 135° 2 12 Straw Finish 100
    $2.39
  • A45685 ACT #37 13/16 1-13/16 135° 2 12 Straw Finish 100
    $2.31
  • A58618 ACT #37 2-1/2 2-1/2 135° 2 12 ALTiN 24
    $4.08
  • A58503 ACT #37 13/16 1-13/16 135° 2 12 ALTiN 74
    $3.83
  • A46464 ACT #38 1-7/16 2-1/2 135° 2 12 Straw Finish 100
    $2.31
  • A45686 ACT #38 13/16 1-13/16 135° 2 12 Straw Finish 100
    $1.98
  • A58619 ACT #38 2-1/2 2-1/2 135° 2 12 ALTiN 100
    $3.83
  • A58504 ACT #38 13/16 1-13/16 135° 2 12 ALTiN 38
    $3.55
  • A46465 ACT #39 1-3/8 2-3/8 135° 2 12 Straw Finish 100
    $2.31
  • A45687 ACT #39 13/16 1-13/16 135° 2 12 Straw Finish 100
    $1.98
  • A58620 ACT #39 2-3/8 2-3/8 135° 2 12 ALTiN 100
    $3.83
  • A58505 ACT #39 13/16 1-13/16 135° 2 12 ALTiN 26
    $3.55
  • A46466 ACT #40 1-3/8 2-3/8 135° 2 12 Straw Finish 100
    $2.31
  • A45688 ACT #40 13/16 1-13/16 135° 2 12 Straw Finish 100
    $1.98
  • A58621 ACT #40 2-3/8 2-3/8 135° 2 12 ALTiN 24
    $3.83
  • A58506 ACT #40 13/16 1-13/16 135° 2 12 ALTiN 62
    $3.55
  • A46467 ACT #41 1-3/8 2-3/8 135° 2 12 Straw Finish 100
    $2.27
  • A45689 ACT #41 13/16 1-13/16 135° 2 12 Straw Finish 100
    $1.94

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

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