McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    12 Products

    Drill Bits

    Cut holes in a variety of metals, from the softest aluminum to the hardest steel.
    High-Speed Steel Jobbers' Length
    Image of Product. Round Shank. Front orientation. Drill Bits. Drill Bits, Jobbers' Length, Spiral Flute, Round Shank.

    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 bit material is also the most versatile. These jobbers' bits have the balance of rigidity and length needed for most applications.
    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.
    Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
    Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.
    Standard Point—Good for general purpose drilling. You’ll need to make a pilot hole to center the bit.
    Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Flute
    Type
    Type
    Size,
    mm
    Drill Bit
    Point Type
    No. of
    Flutes
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Gold Oxide
     
    Metric
    8.40.3307"12186.1SpiralRound8.4Split2NAS907 Type B100000000000000
    8.50.3346"12186.1SpiralRound8.5Split2NAS907 Type B10000000000000
    8.50.3346"12186.1SpiralRound8.5Split2NAS907 Type B500000000000000
    8.60.3386"12186.1SpiralRound8.6Split2NAS907 Type B10000000000000
    8.70.3425"12186.1SpiralRound8.7Split2NAS907 Type B10000000000000
     
    Uncoated
     
    Metric
    8.50.3346"12174.6SpiralRound8.5Standard21000000000000
     
    Cobalt Steel Jobbers' Length
    Image of Product. Round Shank. Front orientation. Drill Bits. Drill Bits, Jobbers' Length, Spiral Flute, Round Shank.

    Round Shank

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

    Split

    The toughness and wear resistance of cobalt steel in a length that's rigid enough for most applications. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.
    Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.
    Shank
    Each
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Flute
    Type
    Type
    Size,
    mm
    Drill Bit
    Point Type
    No. of
    Flutes
    Specs. Met
    1-4
    5-Up
    Uncoated
     
    Metric
    8.60.3386"12186.1SpiralRound8.6Split2NAS907 Type J000000000000000000000
    8.70.3425"12160.7SpiralRound8.7Split2NAS907 Type J0000000000000000000
     
    Carbide-Tipped Steel Jobbers' Length
    Image of Product. Round Shank. Front orientation. Drill Bits. Drill Bits, Jobbers' Length, Spiral Flute, Round Shank.

    Round Shank

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

    Standard

    Split

    The performance of solid carbide but at a lower price point. These jobbers' bits have the balance of rigidity and length needed for most applications. Like carbide bits, they are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.
    Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.
    Standard Point—Good for general purpose drilling. You’ll need to make a pilot hole to center the bit.
    Split Point—Starts cutting on contact so you don’t need a pilot hole. The point also keeps the bit centered for straight and accurate holes, even with a portable drill.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Flute
    Type
    Type
    Size,
    mm
    Drill Bit
    Point Type
    No. of
    Flutes
    Each
    Uncoated Carbide Tipped
     
    Metric
    8.50.3346"12171.1SpiralRound8.5Standard200000000000000
    8.50.3346"12185SpiralRound8.5Split20000000000000
     

    Drill Bits for Hardened Steel

    Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits.
    Carbide-Tipped Steel Jobbers' Length
    Image of Product. Straght Flute. Front orientation. Drill Bits. Drill Bits for Hardened Steel, Jobbers' Length, Straight Flute, Round Shank.

    Straght Flute

    The performance of solid carbide but at a lower price point. These jobbers' bits have the balance of rigidity and length needed for most applications. Like carbide bits, they are extremely stronger and maintain their sharp edges when drilling abrasive material. But for the longest life, there is no beating carbide.
    Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.
    Notched Point—The chisel-like point keeps the bit centered and clears chips.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Flute
    Type
    Type
    Size,
    mm
    Drill Bit
    Point Type
    No. of
    Flutes
    Each
    Uncoated Carbide Tipped
     
    Metric
    8.50.3346"12134StraightRound8.5Notched20000000000000
     

    Left-Hand Drill Bits

    With flutes that spiral in the opposite direction of other bits, these are primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits.
    Cobalt Steel Jobbers' Length
    Image of Product. Front orientation. Drill Bits. Left-Hand Drill Bits, Jobbers' Length, Spiral Flute, Round Shank.

    Spiral Flute

    Round Shank

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

    Split

    The toughness and wear resistance of cobalt steel in a length that's rigid enough for most applications. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Round Shank—The most common shank type. These fit in the chuck of drill presses and portable drills.
    Split Point—Easier to start holes and stay centered than standard-point 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
    No. of
    Flutes
    Specs. Met
    Each
    Uncoated
     
    Metric
    8.50.3346"12187SpiralRound8.5Split2NAS907 Type J0000000000000
     
    back to top