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    30 Products
    About Drill Bits
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    Compare material, finish, length class, and decimal size equivalents.

    Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Jobbers' Length, Morse Taper Shank.

    Jobbers' Length

    Morse Taper Shank

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Each
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    5/8"
    0.625"
    10"4.88"Morse Taper
    Morse 2Split
    000000000000000
    3/4"
    0.75"
    10 1/2"5.88"Morse Taper
    Morse 3Split
    00000000000000
    7/8"
    0.875"
    10 3/4"6.13"Morse Taper
    Morse 3Split
    00000000000000
     
    Uncoated
    1/4"
    0.25"
    6 1/8"2.88"Morse Taper
    Morse 1Split
    000000000000
    17/64"
    0.2656"
    6 1/4"3"Morse Taper
    Morse 1Split
    0000000000000
    9/32"
    0.2813"
    6 1/4"3"Morse Taper
    Morse 1Split
    000000000000
    5/16"
    0.3125"
    6 3/8"3.13"Morse Taper
    Morse 1Split
    000000000000
    21/64"
    0.3281"
    6 1/2"3.25"Morse Taper
    Morse 1Split
    0000000000000
    11/32"
    0.3438"
    6 1/2"3.25"Morse Taper
    Morse 1Split
    000000000000
    3/8"
    0.375"
    7 3/8"3.5"Morse Taper
    Morse 2Split
    000000000000
    25/64"
    0.3906"
    7 1/2"3.63"Morse Taper
    Morse 2Split
    0000000000000
    13/32"
    0.4063"
    7 1/2"3.63"Morse Taper
    Morse 2Split
    000000000000
    27/64"
    0.4219"
    7 3/4"3.88"Morse Taper
    Morse 2Split
    000000000000
    7/16"
    0.4375"
    7 3/4"3.88"Morse Taper
    Morse 2Split
    000000000000
    1/2"
    0.5"
    8 1/4"4.38"Morse Taper
    Morse 2Split
    000000000000
    17/32"
    0.5313"
    8 1/2"4.63"Morse Taper
    Morse 2Split
    000000000000
    9/16"
    0.5625"
    8 3/4"4.88"Morse Taper
    Morse 2Split
    000000000000
    5/8"
    0.625"
    8 3/4"4.88"Morse Taper
    Morse 2Split
    0000000000000
    41/64"
    0.6406"
    9"3.84"Morse Taper
    Morse 2Split
    0000000000000
    21/32"
    0.6563"
    9 3/4"5.13"Morse Taper
    Morse 3Split
    000000000000
    11/16"
    0.6875"
    10"5.38"Morse Taper
    Morse 3Split
    0000000000000
    3/4"
    0.75"
    10 1/2"5.88"Morse Taper
    Morse 3Split
    0000000000000
    13/16"
    0.8125"
    10 3/4"6.13"Morse Taper
    Morse 3Split
    0000000000000
    7/8"
    0.875"
    10 3/4"6.13"Morse Taper
    Morse 3Split
    0000000000000
    15/16"
    0.9375"
    10 3/4"6.13"Morse Taper
    Morse 3Split
    0000000000000
    1"
    1"
    11"6.38"Morse Taper
    Morse 3Split
    0000000000000
    1 1/16"
    1.0625"
    12 1/4"6.63"Morse Taper
    Morse 4Split
    0000000000000
    1 1/4"
    1.25"
    13 1/2"8.63"Morse Taper
    Morse 4Split
    0000000000000
     

    Hollow-Core Cutter Arbor Adapters

    Image of Product. Front orientation. Hollow-Core Cutter Arbor Adapters. Morse Taper Shank.

    Morse

    Taper

    Shank

    Pair these arbor adapters with hollow-core cutters when using a manual drill press or milling machine. Hollow-core cutters are also known as annular cutters.
    Machine
    Taper No.
    Morse Taper
    Dia.
    For Cutter
    Shank Size
    Overall
    Lg.
    For Cutter Material
    Material
    Each
    Morse Taper Shank
    Morse 20.7"3/4"6 1/4"Cobalt Steel, High-Speed SteelHigh-Speed Steel000000000000000
    Morse 30.938"3/4"6 1/4"Cobalt Steel, High-Speed SteelHigh-Speed Steel000000000000000
     
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