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    8 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, Short Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Short Length

    Round Shank

    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.
    Short Length—The most rigid bits for drilling the straightest holes.
    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.
    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.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Type
    Size
    Drill Bit
    Point Type
    Each
    Short Length
     
    Black Oxide
    4.0
    		0.1575"
    		5513.9Round
    		4 mmSplit
    		28255A3300000
    4.1
    		0.1614"
    		5510.2Round
    		4.1 mmSplit
    		28255A860000
    4.2
    		0.1654"
    		5513.5Round
    		4.2 mmSplit
    		28255A350000
     
    Titanium Nitride (TiN) Coated
    4.1
    		0.1614"
    		5510.2Round
    		4.1 mmSplit
    		2979N560000
     

    Smooth-Finish Carbide Drill Bits

    Image of Product. Front orientation. Drill Bits. Smooth-Finish Carbide Drill Bits, Jobbers' Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Jobbers' Length

    Round Shank

    Split

    With more cutting edges than other drill bits, these cut continuously and consistently for a smoother finish. They also stay centered to produce holes that are straighter and more accurate. However, since there’s less space between the cutting edges, they don’t clear chips as quickly. Made of carbide, these are the hardest and most wear-resistant drill bits you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Uncoated—Excellent for a range of materials but won't last as long as coated bits.
    Shank
    Drill Bit
    Size, mm
    Decimal Size
    Equiv.
    Overall
    Lg., mm
    Max. Drilling
    Dp., mm
    Type
    Size
    Drill Bit
    Point Type
    Each
    Jobbers' Length
     
    Uncoated
    4.0
    		0.1575"
    		5521.9Round
    		4 mmSplit
    		2783A2000000
    4.2
    		0.1654"
    		5521.9Round
    		4.2 mmSplit
    		2783A2200000
     

    Diamond-Coated Router Bits for Composites

    With a diamond coating, these bits resist wear when used on abrasive materials, making them last about 50 times longer than uncoated bits. Their sharp cutting edges and flute shapes are specifically designed to cut through tough materials such as composites with minimal resistance. This means less strain on your router and more control when cutting, leading to a smooth cut. Bits are made of solid carbide for longer tool life and faster cutting speeds than high-speed steel.
    Diamond-Coated Carbide
    Image of ProductInUse. Front orientation. Router Bits. Diamond-Coated Router Bits for Composites , Diamond-Coated Carbide, Drill/Mill Cut Style—Plunge-Cut.
    Image of Product. Front orientation. Router Bits. Diamond-Coated Router Bits for Composites , Diamond-Coated Carbide, Drill/Mill Cut Style—Plunge-Cut, Straight Flutes.

    Drill/Mill Cut

    Style—Plunge-Cut

    Drill/Mill Cut

    Style—Plunge-Cut,

    Straight Flutes

    Drill/Mill Cut Style—Bits with a drill/mill cut style have a pointed end for easier plunge cuts than square-cut bits.
    Plunge Cut—Plunge-cutting bits let you cut directly into the workpiece from above. Other bits are best for operations where the peripheral teeth do most of the work such as trimming, contouring, and finishing.
    Straight Flutes—Bits with straight flutes are for general purpose use. They quickly remove material, leaving a rough finish.
    Cutting
    Dia., mm
    Lg. of
    Cut, mm
    Shank Dia.,
    mm
    Overall
    Lg., mm
    No. of
    Flutes
    For Tool
    Type
    For Use On
    Each
    Drill/Mill Cut Style—Plunge-Cut
     
    Straight Flutes
    4124556CNC MachineFiber-Reinforced Plastic, Composite6582N320000000
     

    Carbide Ball End Mills for Tool Steel, Hardened Steel, and Iron

    Image of ProductInUse. Ball Cut Style. Front orientation. Ball Cut Style. Carbide Ball End Mills for Tool Steel, Hardened Steel, and Iron.

    Ball Cut Style

    Image of Product. Front orientation. End Mills. Carbide Ball End Mills for Tool Steel, Hardened Steel, and Iron.
    Flutes have a low helix angle to provide the cutting forces required for difficult-to-machine material, such as hardened steel and iron. Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. They have a ball end for milling rounded slots, slopes, and contours. All are center cutting, allowing plunge cuts into a surface.
    Aluminum Chromium Nitride (AlCrN)-Coated Carbide—An aluminum titanium nitride (AlTiN) or aluminum chromium nitride (AlCrN) coating allows them to dissipate heat better than other end mills, especially at high speeds. At high temperatures, the coating creates a layer of aluminum oxide that transfers heat to the chips, keeping the tool cool, even when used without lubrication. This makes these good for aggressive machining while roughing or making interrupted cuts.
    Mill, mm
    For Maximum
    Hardness Rockwell C63
    Dia.
    Dia.
    Tolerance
    Shank Dia.,
    mm
    Lg. of
    Cut, mm
    Overall
    Lg., mm
    Flute
    Spacing
    Helix
    Angle
    For Use On
    End Mill Type
    Cut
    Style
    Each
    Aluminum Chromium Nitride (AlCrN)-Coated Carbide
     
    2 Flutes
    2.5-0.01 to 0.0056255Equal30°Hardened Steel, Iron, Tool SteelCenter CuttingBall8942A1180000000
     
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