Cobalt Drill Bits
Cobalt Extension Aircraft Drills
Cobalt Jobber Length Drills
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.
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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 A46988 ACT #1 2-5/8 12 135° 2 12 Straw Finish 20 $38.46 -
A46984 ACT 13/64 2-7/16 12 135° 2 12 Straw Finish 56 $35.79 -
A46985 ACT 7/32 2-1/2 12 135° 2 12 Straw Finish 32 $32.37 -
A46986 ACT 15/64 2-5/8 12 135° 2 12 Straw Finish 24 $34.30 -
A58552 ACT 29/64 5-5/8 5-5/8 135° 2 6 ALTiN 32 $32.86 -
A58553 ACT 15/32 5-3/4 5-3/4 135° 2 6 ALTiN 24 $33.56 -
A58554 ACT 31/64 5-7/8 5-7/8 135° 2 6 ALTiN 18 $33.73 -
A58555 ACT 1/2 6 6 135° 2 6 ALTiN 38 $33.02