McMaster-Carr logo
    Filter by
    System of Measurement
    Drill Bit Size
    Industrial Info Compare
    Attribute Image
    Drill Bit Point Type
    Industrial Info Compare
    Decimal Size Equivalent
    Point Angle
    Industrial Info Snippet
    Attribute Image
    Maximum Drilling Depth
    Attribute Image
    Length Class
    Industrial Info Snippet
    Sold As
    Shank Size
    Attribute Image
    Shank Type
    Overall Length
    Attribute Image
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Number of Flutes
    Bit Style
    Flute Direction
    Specifications Met
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    6 Products
    About Drill Bits
    industrial info icon

    Compare material, finish, length class, and decimal size equivalents.

    High-Speed Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

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

    Standard

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

    Split

    Our basic drill bits are also the most versatile. Cut holes in a variety of metals, from the softest aluminum to the hardest steel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Black/Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Black Oxide
    8.8
    		0.3465"
    		12563.4Round
    		8.8 mmStandard
    		Dormer Pramet2958A136000000
     
    Black/Gold Oxide
    8.8
    		0.3465"
    		12487.7Round
    		8.8 mmSplit
    		Viking Norseman Drill30565A3140000
     

    Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Jobbers' Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Jobbers' Length

    Round Shank

    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.
    Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    8.8
    		0.3465"
    		12581Round
    		8.8 mmSplit
    		Dormer Pramet5058N142000000
     
    Gold Oxide
    8.8
    		0.3465"
    		12563.4Round
    		8.8 mmSplit
    		Dormer Pramet29355A14300000
     

    Chip-Clearing Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Chip-Clearing Cobalt Steel Drill Bits, Jobbers' Length, Parabolic Flute, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Jobbers' Length

    Parabolic Flute

    Round Shank

    Split

    Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Flute
    Type
    Type
    Size,
    mm
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    8.8
    		0.3465"
    		12579ParabolicRound
    		8.8Split
    		Viking Norseman Drill2771N783000000
     

    Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods

    Image of Product. Front orientation. Steel. Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods.
    These rods, also known as drill blanks, have an undersized diameter for machining your own drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Dia.,
    mm
    Dia. Tolerance,
    mm
    Drill Bit
    Size, mm
    Lg.
    Yield
    Strength
    Hardness
    Mechanical
    Finish
    Each
    8.8-0.005 to 08.8
    		4 7/8"Not RatedRockwell C60 (Extra Hard)Precision Ground2900A36700000
    back to top