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

    Coolant-Fed Carbide-Tipped Drill Bits

    Image of Product. Front orientation. Contains Inset. Drill Bits. Coolant-Fed Carbide-Tipped Drill Bits, Extended Length, Round Shank.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Extended Length

    Round Shank

    Standard

    Channel coolant through the holes to reduce heat and evacuate chips more efficiently than other bits. These are designed for CNC machines that supply coolant through the spindle rather than an external source, such as a hose and nozzle. Coolant flows directly from the bit's tip onto the drilling surface. This speeds up cuts and leads to excellent performance in deep holes and tough materials such as stainless steel and titanium. A lower-price alternative to solid carbide, they stay sharp when drilling abrasive material but won’t last as long.
    Extended Length—Also known as gun drills, drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Extended Length
     
    Uncoated
    1/8"
    		0.125"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N2090000000
    5/32"
    		0.1563"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N285000000
    3/16"
    		0.1875"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N349000000
    7/32"
    		0.2188"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N381000000
    1/4"
    		0.25"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N455000000
    17/64"
    		0.2656"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N576000000
    9/32"
    		0.2813"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N625000000
    5/16"
    		0.3125"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N674000000
    3/8"
    		0.375"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N787000000
    13/32"
    		0.4063"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N835000000
    1/2"
    		0.5"
    		16"12.5"Round
    		0.7498"Standard
    		Drill Masters2744N95000000
     

    Drill Bits for Wood

    Image of Product. Front orientation. Drill Bits. Drill Bits for Wood.
    Make rough holes in wood for jobs such as running wire and pipe through framing studs and sheets. These bits have two sharp edges for faster cuts than fluted bits and won't cause the surface of the material to splinter. A centering point keeps them stable while drilling soft and hard woods such as pine, plywood, and oak. Also known as spade bits.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Shank
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Uncoated
     
    Hex Shank
    3/8"
    		0.375"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A4300000
    1/2"
    		0.5"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A440000
    5/8"
    		0.625"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A4500000
    3/4"
    		0.75"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A4600000
    7/8"
    		0.875"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A4700000
    1"
    		1"
    		16"14 1/4"1/4"Standard
    		Black & Decker2894A4800000
     

    Adjustable-Length Extensions for Quick-Change Hex-Shank Drill Bits

    Image of Product. Shown Fully Extended. Front orientation. Drill Bit Extensions. Adjustable-Length Extensions for Quick-Change Hex-Shank Drill Bits.

    Shown Fully Extended

    Adjust these extensions to the desired length. They have a quick-change mechanism for fast bit changes. Attach to the shank of a drill bit to extend its reach.
    For Drill Bit
    Shank Size
    Shank
    Size
    Overall Lg.
    OD
    Shank
    Material
    Body
    Material
    Each
    One-Piece Extensions
    1/4"1/4"14", 16", 18", 20", 22", 24"3/4"SteelAluminum
    		2748N12000000
     

    Reamers

    Finish holes to precise inch, metric, wire gauge, or letter sizes with these reamers.
    Adjustable Size, Square Shank
    Finish multiple hole sizes with one reamer by moving the adjustable blades within the diameter range. Convenient for maintenance work, these have a large diameter range and don't require powered tools. They're often used to make precise size adjustments during installation of bearings and bushings.
    Move the blades by tightening and loosening the two nuts on the reamer. To measure size, adjust blades to a known size (such as a bushing or ring), or measure across two opposite blades with a micrometer. When the blades become worn, they can be reground or replaced.
    Turn these reamers by hand with an adjustable wrench or straight-handle tap wrench (sold separately).
    Extension pilots (not included) can be used in place of the end adjustment nut to align holes that are spaced far apart.
    Straight Blade—Use these reamers in straight holes that don't have a keyway or other breaks in the surface.
    Angled Blade—These reamers are better than those with straight blades for finishing holes with breaks in the surface, such as a keyway.
    High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.
    Tool Steel—Typically more economical but less durable than high-speed steel, these are for general purpose reaming.
    Reamers
    Replacement Blades
    Optional
    Extension Pilots
    Reamer Dia.
    Material
    Square Shank
    Size
    Overall
    Lg.
    No. of
    Blades
    For Use On
    Each
    Pkg.
    Qty.
    Pkg.
    Each
    Straight Blade
    Image of Product. Front orientation. Reamers. Reamers, Adjustable Size, Square Shank, Straight Blade.
     
    Inch
    1.7813" to 2.0938" (1 25/32" to 2 3/32")High-Speed Steel
    		0.9370"16"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel3141A28000000063141A5400000003004A320000000
     
    Angled Blade
    Image of Product. Front orientation. Reamers. Reamers, Adjustable Size, Square Shank, Angled Blade.
     
    Inch
    1.7813" to 2.0938" (1 25/32" to 2 3/32")Tool Steel
    		0.9370"16"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium2987A2300000062987A630000003004A32000000
    1.8750" to 2.1875" (1 7/8" to 2 3/16")Tool Steel
    		1.0320"16"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium2987A4200000062987A820000003004A66000000
     

    Reamers for Taper-Pin Holes

    Shape holes to match the profile of taper pins. After drilling a hole that matches the size of the small end of the taper pin you want to install, use these reamers to taper and finish the hole.
    Round Shank
    Image of Product. Front orientation. Contains Annotated. Reamers. Reamers for Taper-Pin Holes, Round Shank, Helix Flute.

    Helix Flute

    These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.
    Helix Flute—Prevent clogging when removing excess material with helix flutes. They also leave a smoother finish than straight flutes.
    High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.
    Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.
    Lg.
    For Taper
    Pin No.
    Reamer Dia.
    (A)
    Reamer Dia.
    (B)
    Material
    Flute
    Overall
    No. of
    Flutes
    Spiral
    Direction
    Cutting Dia.
    Tolerance
    Rate of
    Taper
    For Use On
    Each
    Helix Flute
     
    Inch
    131.2590"1.0090"High-Speed Steel
    		12"16"6Left Hand0" to 0.5"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel2991A32000000000
     
    Square Shank
    Image of Product. Front orientation. Contains Annotated. Reamers. Reamers for Taper-Pin Holes, Square Shank, Straight Flute.
    Image of Product. Front orientation. Contains Annotated. Reamers. Reamers for Taper-Pin Holes, Square Shank, Spiral Flute.

    Straight Flute

    Spiral Flute

    Turn these reamers by hand with an adjustable wrench, straight-handle tap wrench, or pin vise (sold separately).
    Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.
    Spiral Flute—Since these reamers clear chips better than straight flutes, they leave holes with a smoother finish. They're better for holes with breaks in the surface, such as a keyway, because they cut continuously across the breaks instead of moving in and out.
    High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.
    Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.
    Lg.
    For Taper
    Pin No.
    Reamer Dia.
    (A)
    Reamer Dia.
    (B)
    Material
    Square Shank
    Size
    Flute
    Overall
    No. of
    Flutes
    Spiral
    Direction
    Cutting Dia.
    Tolerance
    Rate of
    Taper
    For Use On
    Each
    Straight Flute
     
    Inch
    131.2590"1.0090"High-Speed Steel
    		0.7950"12"16"10—0" to 0.5"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel2990A320000000
     
    Spiral Flute
     
    Inch
    131.2590"1.0090"High-Speed Steel
    		0.7950"12"16"10Left Hand0" to 0.5"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel2990A62000000
     
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