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
    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
  • A78045 ACT 27/64 3-15/16 5.3750 135° 2 1 Gold Oxide 24
    $24.45
  • A58593 ACT #12 3-1/2 3-1/2 135° 2 12 ALTiN 50
    $7.42
  • A58567 ACT L 4-1/4 4-1/4 135° 2 6 ALTiN 24
    $14.64
  • 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
  • A58452 ACT L 1-9/16 2-3/4 135° 2 6 ALTiN 20
    $13.27
  • A58423 ACT 15/64 1-5/16 2-7/16 135° 2 12 ALTiN 50
    $8.33
  • A46843 ACT 13/64 2-7/16 6 135° 2 12 Straw Finish 32
    $15.71
  • A78110 ACT #28 1-3/4 2-7/8 135° 2 1 Gold Oxide 38
    $4.62
  • A78046 ACT 7/16 4-1/16 5-1/2 135° 2 1 Gold Oxide 20
    $25.15
  • A46984 ACT 13/64 2-7/16 12 135° 2 12 Straw Finish 56
    $35.79
  • 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
  • A78047 ACT 29/64 4-3/16 5.6250 135° 2 1 Gold Oxide 24
    $29.98
  • A58594 ACT #13 3-1/2 3-1/2 135° 2 12 ALTiN 24
    $7.26
  • A58568 ACT M 4-3/8 4-3/8 135° 2 6 ALTiN 20
    $15.04
  • A58539 ACT 1/4 4 4 135° 2 12 ALTiN 100
    $9.56
  • A58479 ACT #13 1-1/5 2-3/16 135° 2 12 ALTiN 38
    $6.44
  • A58453 ACT M 1-9/16 2-3/4 135° 2 6 ALTiN 20
    $13.27
  • A58424 ACT 1/4 1-3/8 2-1/2 135° 2 12 ALTiN 100
    $8.66
  • A46853 ACT #29 1-3/4 6 135° 2 12 Straw Finish 38
    $12.25
  • A78108 ACT #26 1-7/8 3 135° 2 1 Gold Oxide 24
    $4.87
  • A78048 ACT 15/32 4-5/16 5.7500 135° 2 1 Gold Oxide 44
    $30.80
  • A46993 ACT #29 1-3/4 12 135° 2 12 Straw Finish 100
    $27.54
  • 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
  • A78049 ACT 31/64 4-3/8 5.8750 135° 2 1 Gold Oxide 44
    $31.00
  • A58595 ACT #14 3-3/8 3-3/8 135° 2 12 ALTiN 26
    $7.26
  • A58569 ACT N 4-3/8 4-3/8 135° 2 6 ALTiN 44
    $15.04
  • A58540 ACT 17/64 4-1/8 4-1/8 135° 2 6 ALTiN 32
    $10.80
  • A58480 ACT #14 1-1/8 2-3/16 135° 2 12 ALTiN 12
    $6.44
  • A58454 ACT N 1-5/8 2-13/16 135° 2 6 ALTiN 62
    $14.06
  • A58425 ACT 17/64 1-7/16 2-5/8 135° 2 6 ALTiN 74
    $9.94
  • A46844 ACT 7/32 2-1/2 6 135° 2 12 Straw Finish 56
    $15.96
  • A78106 ACT #24 2 3-1/8 135° 2 1 Gold Oxide 26
    $5.32
  • A78050 ACT 1/2 4-1/2 6 135° 2 1 Gold Oxide 50
    $31.00
  • A46985 ACT 7/32 2-1/2 12 135° 2 12 Straw Finish 32
    $32.37
  • A46521 ACT O 3-3/16 4-1/2 135° 2 6 Straw Finish 32
    $9.64
  • 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
  • A45723 ACT O 1-11/16 2-15/16 135° 2 6 Straw Finish 100
    $9.11
  • 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
  • A58570 ACT O 4-1/2 4-1/2 135° 2 6 ALTiN 44
    $17.28
  • A58541 ACT 9/32 4-1/4 4-1/4 135° 2 6 ALTiN 100
    $11.25
  • A58481 ACT #15 1-1/8 2-3/16 135° 2 12 ALTiN 38
    $6.44
  • A58455 ACT O 1-11/16 2-15/16 135° 2 6 ALTiN 18
    $15.79
  • A58426 ACT 9/32 1-1/2 2-11/16 135° 2 6 ALTiN 38
    $10.76
  • 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
  • A46994 ACT #30 1-5/8 12 135° 2 12 Straw Finish 100
    $24.94
  • A46522 ACT P 3-5/16 4-5/8 135° 2 6 Straw Finish 100
    $10.19
  • 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
  • A45724 ACT P 1-11/16 2-15/16 135° 2 6 Straw Finish 86
    $9.11
  • 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
  • A58571 ACT P 4-5/8 4-5/8 135° 2 6 ALTiN 44
    $17.93
  • A58542 ACT 19/64 4-3/8 4-3/8 135° 2 6 ALTiN 32
    $13.77
  • A58482 ACT #16 1-1/8 2-3/16 135° 2 12 ALTiN 24
    $6.34
  • A58456 ACT P 1-11/16 2-15/16 135° 2 6 ALTiN 24
    $15.79
  • A58427 ACT 19/64 1-9/16 2-3/4 135° 2 6 ALTiN 38
    $12.45
  • A46845 ACT 15/64 2-5/8 6 135° 2 12 Straw Finish 26
    $17.06
  • A78102 ACT #20 2-1/8 3-1/4 135° 2 1 Gold Oxide 38
    $5.32
  • A46986 ACT 15/64 2-5/8 12 135° 2 12 Straw Finish 24
    $34.30
  • A46523 ACT Q 3-7/16 4-3/4 135° 2 6 Straw Finish 100
    $10.52
  • 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
  • A45725 ACT Q 1-11/16 3 135° 2 6 Straw Finish 100
    $9.98
  • 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
  • A58572 ACT Q 4-3/4 4-3/4 135° 2 6 ALTiN 20
    $18.22
  • A58543 ACT 5/16 4-1/2 4-1/2 135° 2 6 ALTiN 100
    $14.59
  • A58483 ACT #17 1-1/8 2-3/16 135° 2 12 ALTiN 100
    $6.18
  • A58457 ACT Q 1-11/16 3 135° 2 6 ALTiN 26
    $18.06
  • A58428 ACT 5/16 1-5/8 2-13/16 135° 2 6 ALTiN 100
    $13.03
  • A46855 ACT #40 1-5/8 6 135° 2 12 Straw Finish 100
    $7.67

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

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