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
    A58587 ACT #6 3-3/4 3-3/4 135° 2 12 ALTiN 26
    $9.56
  • A58561 ACT F 4-1/8 4-1/8 135° 2 6 ALTiN 62
    $11.66
  • 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
  • A58446 ACT F 1-7/16 2-5/8 135° 2 6 ALTiN 80
    $11.09
  • A58417 ACT 9/64 15/16 1-15/16 135° 2 12 ALTiN 26
    $4.20
  • A46840 ACT 5/32 2 6 135° 2 12 Straw Finish 74
    $11.38
  • 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
  • A46981 ACT 5/32 2 12 135° 2 12 Straw Finish 100
    $25.94
  • 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
  • A78035 ACT 17/64 2-7/8 4-1/8 135° 2 1 Gold Oxide 38
    $9.86
  • A58588 ACT #7 3-5/8 3-5/8 135° 2 12 ALTiN 50
    $7.42
  • A58562 ACT G 4-1/8 4-1/8 135° 2 6 ALTiN 24
    $11.66
  • 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
  • A58447 ACT G 1-7/16 2-5/8 135° 2 6 ALTiN 32
    $11.09
  • A58418 ACT 5/32 1 2-1/16 135° 2 12 ALTiN 100
    $4.62
  • A46850 ACT #11 2-5/16 6 135° 2 12 Straw Finish 100
    $11.74
  • A78120 ACT #38 1-7/16 2-1/2 135° 2 1 Gold Oxide 26
    $3.83
  • A78036 ACT 9/32 2-15/16 4-1/4 135° 2 1 Gold Oxide 26
    $10.31
  • A46990 ACT #11 2-5/16 12 135° 2 12 Straw Finish 24
    $28.53
  • 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
  • A78037 ACT 19/64 3-1/16 4-3/8 135° 2 1 Gold Oxide 44
    $12.62
  • A58589 ACT #8 3-5/8 3-5/8 135° 2 12 ALTiN 12
    $7.42
  • A58563 ACT H 4-1/8 4-1/8 135° 2 6 ALTiN 20
    $13.15
  • 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
  • A58448 ACT H 1-1/2 2-11/16 135° 2 6 ALTiN 20
    $11.88
  • A58419 ACT 11/64 1-1/16 2-1/8 135° 2 12 ALTiN 38
    $5.24
  • A46841 ACT 11/64 2-1/8 6 135° 2 12 Straw Finish 68
    $12.53
  • A78118 ACT #36 1-7/16 2-1/2 135° 2 1 Gold Oxide 38
    $3.96
  • A78038 ACT 5/16 3-3/16 4-1/2 135° 2 1 Gold Oxide 62
    $13.65
  • A46982 ACT 11/64 2-1/8 12 135° 2 12 Straw Finish 86
    $28.08
  • A46515 ACT I 2-7/8 4-1/8 135° 2 6 Straw Finish 100
    $7.17
  • A46435 ACT #9 2-7/16 3-5/8 135° 2 12 Straw Finish 100
    $4.12
  • A46405 ACT 11/64 2-1/8 3-1/4 135° 2 12 Straw Finish 100
    $3.22
  • A45717 ACT I 1-1/2 2-11/16 135° 2 6 Straw Finish 20
    $6.38
  • A45657 ACT #9 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.79
  • A45628 ACT 3/16 1-1/8 2-3/16 135° 2 12 Straw Finish 38
    $3.42
  • A78117 ACT #35 1-1/2 2-5/8 135° 2 1 Gold Oxide 26
    $4.08
  • A78039 ACT 21/64 3-5/16 4-5/8 135° 2 1 Gold Oxide 32
    $14.92
  • A58590 ACT #9 2-7/16 3-5/8 135° 2 12 ALTiN 62
    $7.42
  • A58564 ACT I 4-1/8 4-1/8 135° 2 6 ALTiN 56
    $13.15
  • A58535 ACT 3/16 3-1/2 3-1/2 135° 2 12 ALTiN 100
    $6.34
  • A58475 ACT #9 1-3/16 2-1/4 135° 2 12 ALTiN 50
    $6.76
  • A58449 ACT I 1-1/2 2-11/16 135° 2 6 ALTiN 32
    $11.88
  • A58420 ACT 3/16 1-1/8 2-3/16 135° 2 12 ALTiN 26
    $6.18
  • A46851 ACT #20 2-1/8 6 135° 2 12 Straw Finish 100
    $11.05
  • A78116 ACT #34 1-1/2 2-5/8 135° 2 1 Gold Oxide 74
    $4.08
  • A78040 ACT 11/32 3-7/16 4-3/4 135° 2 1 Gold Oxide 44
    $16.37
  • A46991 ACT #20 2-1/8 12 135° 2 12 Straw Finish 100
    $26.47
  • A46516 ACT J 2-7/8 4-1/8 135° 2 6 Straw Finish Available to Order*
    $7.17
  • A46436 ACT #10 2-7/16 3-5/8 135° 2 12 Straw Finish 100
    $4.12
  • A46406 ACT 3/16 2-5/16 3-1/2 135° 2 12 Straw Finish 100
    $3.55
  • A45718 ACT J 1-1/2 2-11/16 135° 2 6 Straw Finish 80
    $6.38
  • A45658 ACT #10 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.79
  • A45629 ACT 13/64 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.96
  • A78115 ACT #33 1-1/2 2-5/8 135° 2 1 Gold Oxide 38
    $4.08
  • A78041 ACT 23/64 3-1/2 4-7/8 135° 2 1 Gold Oxide 38
    $18.81
  • A58591 ACT #10 3-5/8 3-5/8 135° 2 12 ALTiN 100
    $7.42
  • A58565 ACT J 4-1/8 4-1/8 135° 2 6 ALTiN 38
    $13.15
  • A58536 ACT 13/64 3-5/8 3-5/8 135° 2 12 ALTiN 62
    $7.71
  • A58476 ACT #10 1-3/16 2-1/4 135° 2 12 ALTiN 26
    $6.76
  • A58450 ACT J 1-1/2 2-11/16 135° 2 6 ALTiN 2
    $11.88
  • A58421 ACT 13/64 1-3/16 2-1/4 135° 2 12 ALTiN 100
    $7.05
  • A46842 ACT 3/16 2-5/16 6 135° 2 12 Straw Finish 50
    $10.68
  • A78114 ACT #32 1-5/8 2-3/4 135° 2 1 Gold Oxide 62
    $4.16
  • A78042 ACT 3/8 3-5/8 5 135° 2 1 Gold Oxide 44
    $18.81
  • A46983 ACT 3/16 2-5/16 12 135° 2 12 Straw Finish 24
    $27.25
  • A46517 ACT K 2-15/16 4-1/4 135° 2 6 Straw Finish 62
    $7.17
  • A46437 ACT #11 2-5/16 3-1/2 135° 2 12 Straw Finish 100
    $4.12
  • A46407 ACT 13/64 2-7/16 3-5/8 135° 2 12 Straw Finish 100
    $4.20
  • A45719 ACT K 1-1/2 2-11/16 135° 2 6 Straw Finish 12
    $6.38
  • A45659 ACT #11 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.59
  • A45630 ACT 7/32 1-1/4 2-3/8 135° 2 12 Straw Finish 100
    $4.28
  • A78113 ACT #31 1-5/8 2-3/4 135° 2 1 Gold Oxide 62
    $4.16
  • A78043 ACT 25/64 3-3/4 5.1250 135° 2 1 Gold Oxide 32
    $21.36
  • A58592 ACT #11 3-1/2 3-1/2 135° 2 12 ALTiN 62
    $7.42
  • A58566 ACT K 4-1/4 4-1/4 135° 2 6 ALTiN 20
    $13.15
  • A58537 ACT 7/32 3-3/4 3-3/4 135° 2 12 ALTiN 74
    $8.33
  • A58477 ACT #11 1-3/16 2-1/4 135° 2 12 ALTiN 12
    $6.48
  • A58451 ACT K 1-1/2 2-11/16 135° 2 6 ALTiN 18
    $11.88
  • A58422 ACT 7/32 1-1/4 2-3/8 135° 2 12 ALTiN 62
    $7.79
  • A46852 ACT #21 2-1/8 6 135° 2 12 Straw Finish 32
    $11.05
  • A78112 ACT #30 1-5/8 2-3/4 135° 2 1 Gold Oxide 86
    $4.32
  • A78044 ACT 13/32 3-7/8 5-1/4 135° 2 1 Gold Oxide 24
    $22.10
  • A46992 ACT #21 2-1/8 12 135° 2 12 Straw Finish 100
    $26.55

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

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