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
    A78159 ACT #18 2-1/8 3-1/4 135° 2 1 Gold Oxide 26
    $5.44
  • A46995 ACT #40 1-3/8 12 135° 2 12 Straw Finish 50
    $27.54
  • A46524 ACT R 3-7/16 4-3/4 135° 2 6 Straw Finish 74
    $10.52
  • 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
  • A45726 ACT R 1-11/16 3 135° 2 6 Straw Finish 74
    $9.98
  • 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
  • A78158 ACT #17 2-3/16 3-3/8 135° 2 1 Gold Oxide 74
    $5.99
  • A58599 ACT #18 3-1/4 3-1/4 135° 2 12 ALTiN 24
    $5.89
  • A58573 ACT R 4-3/4 4-3/4 135° 2 6 ALTiN 38
    $18.18
  • A58544 ACT 21/64 4-5/8 4-5/8 135° 2 6 ALTiN 38
    $15.41
  • A58484 ACT #18 1-1/16 2-1/8 135° 2 12 ALTiN Available to Order*
    $5.24
  • A58458 ACT R 1-11/16 3 135° 2 6 ALTiN 24
    $18.06
  • A58429 ACT 21/64 1-11/16 2-15/16 135° 2 6 ALTiN 32
    $14.76
  • A46846 ACT 1/4 2-3/4 6 135° 2 12 Straw Finish 26
    $16.61
  • A78157 ACT #16 2-3/16 3-3/8 135° 2 1 Gold Oxide 24
    $6.22
  • A46987 ACT 1/4 2-3/4 12 135° 2 12 Straw Finish 56
    $31.71
  • A46525 ACT S 3-1/2 4-7/8 135° 2 6 Straw Finish 80
    $13.03
  • A46445 ACT #19 2-1/8 3-1/4 135° 2 12 Straw Finish 100
    $3.22
  • A46415 ACT 21/64 3-5/16 4-5/8 135° 2 6 Straw Finish 100
    $8.95
  • A45727 ACT S 1-3/4 3-1/16 135° 2 6 Straw Finish 86
    $12.33
  • A45667 ACT #19 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.81
  • A45638 ACT 11/32 1-11/16 3 135° 2 6 Straw Finish 100
    $8.74
  • A78156 ACT #15 2-3/16 3-3/8 135° 2 1 Gold Oxide 74
    $6.85
  • A58600 ACT #19 3-1/4 3-1/4 135° 2 12 ALTiN 24
    $5.73
  • 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
  • A58485 ACT #19 1-1/16 2-1/8 135° 2 12 ALTiN 62
    $4.99
  • A58459 ACT S 1-3/4 3-1/16 135° 2 6 ALTiN 24
    $22.52
  • A58430 ACT 11/32 1-11/16 3 135° 2 6 ALTiN 44
    $15.37
  • A78155 ACT #14 2-3/16 3-3/8 135° 2 1 Gold Oxide 26
    $6.85
  • A46526 ACT T 3-1/2 4-7/8 135° 2 6 Straw Finish 32
    $13.03
  • A46446 ACT #20 2-1/8 3-1/4 135° 2 12 Straw Finish 100
    $3.22
  • A46416 ACT 11/32 3-7/16 4-3/4 135° 2 6 Straw Finish 100
    $9.86
  • A45728 ACT T 1-3/4 3-1/16 135° 2 6 Straw Finish 62
    $12.33
  • A45668 ACT #20 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.81
  • A45639 ACT 23/64 1-3/4 3-1/16 135° 2 6 Straw Finish 100
    $10.15
  • A78154 ACT #13 2-5/16 3-1/2 135° 2 1 Gold Oxide 26
    $6.85
  • A58601 ACT #20 3-1/4 3-1/4 135° 2 12 ALTiN 100
    $5.73
  • 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
  • A58486 ACT #20 1-1/16 2-1/8 135° 2 12 ALTiN 24
    $4.99
  • 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
  • A78153 ACT #12 2-5/16 3-1/2 135° 2 1 Gold Oxide 38
    $6.93
  • A46527 ACT U 3-5/8 5 135° 2 6 Straw Finish 100
    $13.03
  • A46447 ACT #21 2-1/8 3-1/4 135° 2 12 Straw Finish 100
    $3.22
  • A46417 ACT 23/64 3-1/2 4-7/8 135° 2 6 Straw Finish 100
    $11.25
  • A45729 ACT U 1-13/16 3-1/8 135° 2 6 Straw Finish 100
    $12.33
  • A45669 ACT #21 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.81
  • A45640 ACT 3/8 1-13/16 3-1/8 135° 2 6 Straw Finish 100
    $10.15
  • A78152 ACT #11 2-5/16 3-1/2 135° 2 1 Gold Oxide 38
    $6.93
  • A58602 ACT #21 3-1/4 3-1/4 135° 2 12 ALTiN 50
    $5.69
  • 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
  • A58487 ACT #21 1-1/16 2-1/8 135° 2 12 ALTiN 100
    $4.99
  • 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
  • A78151 ACT #10 2-7/16 3-5/8 135° 2 1 Gold Oxide 100
    $6.93
  • A46528 ACT V 3-5/8 5 135° 2 6 Straw Finish 56
    $14.27
  • A46448 ACT #22 2 3-1/8 135° 2 12 Straw Finish 26
    $3.22
  • A46418 ACT 3/8 3-5/8 5 135° 2 6 Straw Finish 100
    $11.25
  • A45730 ACT V 1-7/8 3-1/4 135° 2 6 Straw Finish 50
    $13.65
  • A45670 ACT #22 1-1/16 2-1/8 135° 2 12 Straw Finish 100
    $2.81
  • A45641 ACT 25/64 1-7/8 3-1/4 135° 2 6 Straw Finish 100
    $11.66
  • A78150 ACT #9 2-7/16 3-5/8 135° 2 1 Gold Oxide 62
    $6.93
  • A58603 ACT #22 3-1/8 3-1/8 135° 2 12 ALTiN 12
    $5.69
  • A58577 ACT V 5 5 135° 2 6 ALTiN 24
    $25.94
  • A58548 ACT 25/64 5-1/8 5-1/8 135° 2 6 ALTiN 18
    $22.46
  • A58488 ACT #22 1-1/16 2-1/8 135° 2 12 ALTiN 38
    $4.99
  • A58462 ACT V 1-7/8 3-1/4 135° 2 6 ALTiN 18
    $25.03
  • A58433 ACT 25/64 1-7/8 3-1/4 135° 2 6 ALTiN 20
    $19.87
  • A78149 ACT #8 2-7/16 3-5/8 135° 2 1 Gold Oxide 38
    $6.93
  • A46529 ACT W 3-3/4 5-1/8 135° 2 6 Straw Finish 100
    $14.27
  • A46449 ACT #23 2 3-1/8 135° 2 12 Straw Finish 50
    $3.22
  • A46419 ACT 25/64 3-3/4 5-1/8 135° 2 6 Straw Finish 100
    $12.86
  • A45731 ACT W 1-7/8 3-1/4 135° 2 6 Straw Finish 100
    $13.65
  • A45671 ACT #23 1 2-1/16 135° 2 12 Straw Finish 100
    $2.81
  • A45642 ACT 13/32 1-15/16 3-5/16 135° 2 6 Straw Finish 100
    $11.92
  • A78148 ACT #7 2-7/16 3-5/8 135° 2 1 Gold Oxide 62
    $6.93
  • A58604 ACT #23 3-1/8 3-1/8 135° 2 12 ALTiN 38
    $5.69
  • A58578 ACT W 5-1/8 5-1/8 135° 2 6 ALTiN 20
    $25.94
  • A58549 ACT 13/32 5-1/4 5-1/4 135° 2 6 ALTiN 24
    $22.97
  • A58489 ACT #23 1 2-1/16 135° 2 12 ALTiN 38
    $4.99
  • A58463 ACT W 1-7/8 3-1/4 135° 2 6 ALTiN 26
    $25.03
  • A58434 ACT 13/32 1-15/16 3-5/16 135° 2 6 ALTiN 50
    $21.77
  • A78147 ACT #6 2-1/2 3-3/4 135° 2 1 Gold Oxide 26
    $8.82
  • A46530 ACT X 3-3/4 5-1/8 135° 2 6 Straw Finish 68
    $14.27
  • A46450 ACT #24 2 3-1/8 135° 2 12 Straw Finish 100
    $3.22
  • A46420 ACT 13/32 3-7/8 5-1/4 135° 2 6 Straw Finish 100
    $13.27
  • A45732 ACT X 1-15/16 3-5/16 135° 2 6 Straw Finish 100
    $13.65
  • A45672 ACT #24 1 2-1/16 135° 2 12 Straw Finish 100
    $2.81
  • A45643 ACT 27/64 2 3-3/8 135° 2 6 Straw Finish 100
    $13.23
  • A78146 ACT #5 2-1/2 3-3/4 135° 2 1 Gold Oxide 38
    $8.82
  • A58605 ACT #24 3-1/8 3-1/8 135° 2 12 ALTiN 100
    $5.69
  • A58579 ACT X 5-1/8 5-1/8 135° 2 6 ALTiN 6
    $25.94
  • A58550 ACT 27/64 5-3/8 5-3/8 135° 2 6 ALTiN 56
    $26.80
  • A58490 ACT #24 1 2-1/16 135° 2 12 ALTiN 26
    $4.99
  • A58464 ACT X 1-15/16 3-5/16 135° 2 6 ALTiN 24
    $25.03

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

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