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
    A78118 ACT #36 1-7/16 2-1/2 135° 2 1 Gold Oxide 38
    $3.96
  • 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
  • A58590 ACT #9 2-7/16 3-5/8 135° 2 12 ALTiN 62
    $7.42
  • 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
  • A58420 ACT 3/16 1-1/8 2-3/16 135° 2 12 ALTiN 26
    $6.18
  • A78116 ACT #34 1-1/2 2-5/8 135° 2 1 Gold Oxide 74
    $4.08
  • 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
  • A58591 ACT #10 3-5/8 3-5/8 135° 2 12 ALTiN 100
    $7.42
  • 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
  • A58421 ACT 13/64 1-3/16 2-1/4 135° 2 12 ALTiN 100
    $7.05
  • A78114 ACT #32 1-5/8 2-3/4 135° 2 1 Gold Oxide 62
    $4.16
  • 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
  • A58592 ACT #11 3-1/2 3-1/2 135° 2 12 ALTiN 62
    $7.42
  • 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
  • A58422 ACT 7/32 1-1/4 2-3/8 135° 2 12 ALTiN 62
    $7.79
  • A78112 ACT #30 1-5/8 2-3/4 135° 2 1 Gold Oxide 86
    $4.32
  • A46518 ACT L 2-15/16 4-1/4 135° 2 6 Straw Finish 56
    $8.21
  • A46438 ACT #12 2-5/16 3-1/2 135° 2 12 Straw Finish 100
    $4.12
  • A46408 ACT 7/32 2-1/2 3-3/4 135° 2 12 Straw Finish 100
    $4.66
  • A45720 ACT L 1-9/16 2-3/4 135° 2 6 Straw Finish 24
    $7.71
  • A45660 ACT #12 1-3/16 2-1/4 135° 2 12 Straw Finish 100
    $3.59
  • A45631 ACT 15/64 1-5/16 2-7/16 135° 2 12 Straw Finish 86
    $4.54
  • A78111 ACT #29 1-3/4 2-7/8 135° 2 1 Gold Oxide 86
    $4.50
  • A58593 ACT #12 3-1/2 3-1/2 135° 2 12 ALTiN 50
    $7.42
  • A58538 ACT 15/64 3-7/8 3-7/8 135° 2 12 ALTiN 26
    $8.91
  • A58478 ACT #12 1-3/16 2-1/4 135° 2 12 ALTiN 24
    $6.48
  • A58423 ACT 15/64 1-5/16 2-7/16 135° 2 12 ALTiN 50
    $8.33
  • A78110 ACT #28 1-3/4 2-7/8 135° 2 1 Gold Oxide 38
    $4.62
  • A46519 ACT M 3-1/16 4-3/8 135° 2 6 Straw Finish 100
    $8.66
  • A46439 ACT #13 2-5/16 3-1/2 135° 2 12 Straw Finish 100
    $4.08
  • A46409 ACT 15/64 2-5/8 3-7/8 135° 2 12 Straw Finish 100
    $4.87
  • A45721 ACT M 1-9/16 2-3/4 135° 2 6 Straw Finish 74
    $7.71
  • A45661 ACT #13 1-1/5 2-3/16 135° 2 12 Straw Finish 74
    $3.55
  • A45632 ACT 1/4 1-3/8 2-1/2 135° 2 12 Straw Finish 100
    $4.79
  • A78109 ACT #27 1-7/8 3 135° 2 1 Gold Oxide 62
    $4.87
  • A58594 ACT #13 3-1/2 3-1/2 135° 2 12 ALTiN 24
    $7.26
  • A58479 ACT #13 1-1/5 2-3/16 135° 2 12 ALTiN 38
    $6.44
  • A58424 ACT 1/4 1-3/8 2-1/2 135° 2 12 ALTiN 100
    $8.66
  • A78108 ACT #26 1-7/8 3 135° 2 1 Gold Oxide 24
    $4.87
  • A46520 ACT N 3-1/16 4-3/8 135° 2 6 Straw Finish 100
    $8.66
  • A46440 ACT #14 2-3/16 3-3/8 135° 2 12 Straw Finish 100
    $4.08
  • A46410 ACT 1/4 2-3/4 4 135° 2 12 Straw Finish 100
    $5.24
  • A45722 ACT N 1-5/8 2-13/16 135° 2 6 Straw Finish 100
    $8.33
  • A45662 ACT #14 1-1/8 2-3/16 135° 2 12 Straw Finish 100
    $3.55
  • A45633 ACT 17/64 1-7/16 2-5/8 135° 2 6 Straw Finish 86
    $5.36
  • A78107 ACT #25 1-7/8 3 135° 2 1 Gold Oxide 38
    $5.03
  • A58595 ACT #14 3-3/8 3-3/8 135° 2 12 ALTiN 26
    $7.26
  • A58480 ACT #14 1-1/8 2-3/16 135° 2 12 ALTiN 12
    $6.44
  • A78106 ACT #24 2 3-1/8 135° 2 1 Gold Oxide 26
    $5.32
  • A46441 ACT #15 2-3/16 3-3/8 135° 2 12 Straw Finish 100
    $4.08
  • A46411 ACT 17/64 2-7/8 4-1/8 135° 2 6 Straw Finish 100
    $5.93
  • A45663 ACT #15 1-1/8 2-3/16 135° 2 12 Straw Finish 100
    $3.55
  • A45634 ACT 9/32 1-1/2 2-11/16 135° 2 6 Straw Finish 62
    $5.89
  • A78105 ACT #23 2 3-1/8 135° 2 1 Gold Oxide 26
    $5.32
  • A58596 ACT #15 3-3/8 3-3/8 135° 2 12 ALTiN Available to Order*
    $7.26
  • A58481 ACT #15 1-1/8 2-3/16 135° 2 12 ALTiN 38
    $6.44
  • A46854 ACT #30 1-5/8 6 135° 2 12 Straw Finish 100
    $8.33
  • A78104 ACT #22 2 3-1/8 135° 2 1 Gold Oxide 26
    $5.32
  • A46442 ACT #16 2-3/16 3-3/8 135° 2 12 Straw Finish 100
    $3.75
  • A46412 ACT 9/32 2-15/16 4-1/4 135° 2 6 Straw Finish 100
    $6.18
  • A45664 ACT #16 1-1/8 2-3/16 135° 2 12 Straw Finish 100
    $3.55
  • A45635 ACT 19/64 1-9/16 2-3/4 135° 2 6 Straw Finish 74
    $6.89
  • A78103 ACT #21 2-1/8 3-1/4 135° 2 1 Gold Oxide 62
    $5.32
  • A58597 ACT #16 3-3/8 3-3/8 135° 2 12 ALTiN 38
    $6.60
  • A58482 ACT #16 1-1/8 2-3/16 135° 2 12 ALTiN 24
    $6.34
  • A78102 ACT #20 2-1/8 3-1/4 135° 2 1 Gold Oxide 38
    $5.32
  • A46443 ACT #17 2-3/16 3-3/8 135° 2 12 Straw Finish 100
    $3.59
  • A46413 ACT 19/64 3-1/16 4-3/8 135° 2 6 Straw Finish 100
    $7.63
  • A45665 ACT #17 1-1/8 2-3/16 135° 2 12 Straw Finish 74
    $3.42
  • A45636 ACT 5/16 1-5/8 2-13/16 135° 2 6 Straw Finish 100
    $7.30
  • A78160 ACT #19 2-1/8 3-1/4 135° 2 1 Gold Oxide 26
    $5.32
  • A58598 ACT #17 3-3/8 3-3/8 135° 2 12 ALTiN 24
    $6.48
  • A58483 ACT #17 1-1/8 2-3/16 135° 2 12 ALTiN 100
    $6.18
  • A46855 ACT #40 1-5/8 6 135° 2 12 Straw Finish 100
    $7.67
  • A78159 ACT #18 2-1/8 3-1/4 135° 2 1 Gold Oxide 26
    $5.44
  • A46444 ACT #18 2-1/8 3-1/4 135° 2 12 Straw Finish 100
    $3.30
  • A46414 ACT 5/16 3-3/16 4-1/2 135° 2 6 Straw Finish 100
    $8.17
  • A45666 ACT #18 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.97
  • A45637 ACT 21/64 1-11/16 2-15/16 135° 2 6 Straw Finish 100
    $8.17

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

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