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    42 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.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Jobbers' Length

    Round Shank

    Standard

    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.
    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—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.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Black Oxide
    19/32"
    		0.5938"
    		7 1/8"4.29"Round
    		19/32"Standard
    		Chicago-Latrobe2931A49000000
    39/64"
    		0.6094"
    		7 1/8"4.27"Round
    		39/64"Standard
    		Chicago-Latrobe2931A5100000
    5/8"
    		0.625"
    		7 1/8"4.25"Round
    		5/8"Standard
    		Chicago-Latrobe2931A5200000
    41/64"
    		0.6406"
    		7 1/8"4.22"Round
    		41/64"Standard
    		Chicago-Latrobe2931A5300000
    21/32"
    		0.6563"
    		7 1/8"4.2"Round
    		21/32"Standard
    		Chicago-Latrobe2931A5400000
     
    Titanium Nitride (TiN) Coated
    19/32"
    		0.5938"
    		7 1/8"4.29"Round
    		19/32"Standard
    		Chicago-Latrobe3022A6800000
    39/64"
    		0.6094"
    		7 1/8"4.27"Round
    		39/64"Standard
    		Chicago-Latrobe3022A6900000
    5/8"
    		0.625"
    		7 1/8"4.25"Round
    		5/8"Standard
    		Chicago-Latrobe3022A7100000
    41/64"
    		0.6406"
    		7 1/8"4.22"Round
    		41/64"Standard
    		Chicago-Latrobe3022A7200000
    21/32"
    		0.6563"
    		7 1/8"4.2"Round
    		21/32"Standard
    		Chicago-Latrobe3022A7300000
     
    Uncoated
    19/32"
    		0.5938"
    		7 1/8"4.29"Round
    		19/32"Standard
    		Viking Norseman Drill8870A5200000
    39/64"
    		0.6094"
    		7 1/8"4.27"Round
    		39/64"Standard
    		Viking Norseman Drill8870A5300000
    5/8"
    		0.625"
    		7 1/8"4.25"Round
    		5/8"Standard
    		Viking Norseman Drill8870A5400000
    41/64"
    		0.6406"
    		7 1/8"4.22"Round
    		41/64"Standard
    		Viking Norseman Drill8870A5500000
    21/32"
    		0.6563"
    		7 1/8"4.2"Round
    		21/32"Standard
    		Viking Norseman Drill8870A5600000
     

    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.
    Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron, titanium, and fiberglass.
    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
    Mfr.
    Each
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    19/32"
    		0.5938"
    		7 1/8"5.19"Round
    		19/32"Split
    		Dormer Pramet27995A548000000
    39/64"
    		0.6094"
    		7 1/8"5.19"Round
    		39/64"Split
    		Dormer Pramet27995A54900000
    5/8"
    		0.625"
    		7 1/8"5.19"Round
    		5/8"Split
    		Dormer Pramet27995A55100000
    41/64"
    		0.6406"
    		7 1/8"5.19"Round
    		41/64"Split
    		Dormer Pramet27995A55200000
    21/32"
    		0.6563"
    		7 1/8"5.19"Round
    		21/32"Split
    		Dormer Pramet27995A55300000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    41/64"
    		0.6406"
    		7 1/8"5.19"Round
    		41/64"Split
    		Dormer Pramet27995A816000000
     
    Uncoated
    19/32"
    		0.5938"
    		7 1/8"4.2"Round
    		19/32"Split
    		Chicago-Latrobe3069A8600000
    39/64"
    		0.6094"
    		7 1/8"4.2"Round
    		39/64"Split
    		Chicago-Latrobe3069A8700000
    5/8"
    		0.625"
    		7 1/8"4.2"Round
    		5/8"Split
    		Chicago-Latrobe3069A8800000
    41/64"
    		0.6406"
    		7 1/8"4.2"Round
    		41/64"Split
    		Chicago-Latrobe3069A8900000
    21/32"
    		0.6563"
    		7 1/8"4.2"Round
    		21/32"Split
    		Chicago-Latrobe3069A9100000
    43/64"
    		0.6719"
    		7 1/8"4.6"Round
    		43/64"Split
    		Chicago-Latrobe3069A92000000
    11/16"
    		0.6875"
    		7 1/8"4.6"Round
    		11/16"Split
    		Chicago-Latrobe3069A93000000
     

    Clamp-On Drill Bit Guides

    Image of Product. Front orientation. Drill Bit Guides. Clamp-On Drill Bit Guides.
    Drill precise holes without building a fixture. Clamp the jig onto your material and lift and turn the turret to select the hole size you need. Use the graduations to set the jig to the centerline of your workpiece.
    For Drill Bit Size
    For Drill Bit Size Decimal Equiv.
    Max. Opening
    Wd.
    Lg.
    Wd.
    Ht.
    Material
    Each
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2"0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"4"7 1/8"3 1/2"2 1/8"Steel, Nylon
    		3123A11000000

    Tap and Drill Bit Cases

    For Drill Bits
    Image of Product. Front orientation. Tap and Drill Bit Stands. Tap and Drill Bit Cases, For Drill Bits, Steel.

    Steel

    Store and organize drill bits so they stay in good working condition and don't go missing. These cases have individually marked holes for each size in your set.
    Steel—Steel cases have stands that fold in and out. Stand them up when you need them, then fold them back into the slim case for storage inside a workbench drawer.
    For
    Drill Bit
    Overall
    Material
    No.
    of
    Size
    Lg.
    Wd.
    Ht.
    Each
    For Metric Drill Bits
     
    For Jobbers' Length
    Steel
    		416.0 mm to 10.0 mm (Increments of 0.1 mm)7 1/8"4 1/2"2 1/2"2961A32000000
     

    Countersink Drill Bits for Screws

    Image of Product. Front orientation. Contains Annotated. Countersink Drill Bits. Countersink Drill Bits for Screws.
    Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
    Dia.
    Lg.
    82°
    Countersink Angle
    For Screw
    Size
    Body
    Step
    Step
    Overall
    Shank
    Dia.
    Point
    Angle
    For Use On
    Mfr.
    Each
    Uncoated High-Speed Steel
     
    2 Flutes
    5/16"
    		5/8"0.320"3/4"7 1/8"0.6250"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelRepublic Drill8914A55000000
     

    Counterbore Drill Bits

    Image of Product. Front orientation. Contains Annotated. Counterbore Drill Bits. Counterbore Drill Bits.
    Often called step drill bits, these cut a pilot hole and counterbore in a single pass to eliminate tool changes and ensure precise alignment. Made of high-speed steel, they handle a wide range of materials, including aluminum, plastic, and stainless steel. They can be resharpened to extend tool life. The body diameter may decrease after multiple sharpenings.
    Dia.
    Lg.
    For Screw
    Size
    Body
    Step
    Step
    Overall
    Point
    Angle
    For Use On
    Mfr.
    Each
    Uncoated High-Speed Steel
    3/8"
    		0.594"0.406"7/8"7 1/8"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelRepublic Drill8914A36000000
     

    High-Speed Steel Square End Mills

    Image of Product. Front orientation. End Mills. High-Speed Steel Square End Mills, 2 Flutes.

    2 Flutes

    Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. They have a square end for milling square slots, pockets, and edges.
    End mills with fewer flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts; end mills with more flutes provide a finer finish and operate with less vibration when run at high speeds.
    Uncoated High-Speed Steel—Use uncoated end mills for general purpose milling and short production runs.
    Titanium Nitride (TiN)-Coated High-Speed Steel—Use titanium nitride (TiN)-coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. They’re more wear resistant than uncoated end mills, which means they last longer when run at similar speeds.
    Center Cutting—Center-cutting end mills allow plunge cuts into a surface.
    Mill
    Dia.
    Dia. Tolerance
    Shank
    Dia.
    Lg. of
    Cut
    Overall
    Lg.
    Flute
    Spacing
    Helix
    Angle
    For Use On
    End Mill Type
    Cut
    Style
    Mfr.
    Each
    Uncoated High-Speed Steel
     
    2 Flutes
    1"0.000" to 0.001"1"4 5/8"7 1/8"Equal30°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelCenter CuttingSquareQuinco Tool Products3051A684000000
     
    Titanium Nitride (TiN)-Coated High-Speed Steel
     
    2 Flutes
    1"0.000" to 0.001"1"4 5/8"7 1/8"Equal30°Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool SteelCenter CuttingSquareQuinco Tool Products8949A85300000
     

    Impact Wrench Reamers for Hole Alignment

    Driven by the high torque of an impact wrench, these reamers enlarge holes to correct misalignment and overlap faster than with a power drill. The tapered shape fits into narrow holes and makes more contact than straight reamers when removing material. Also known as bridge and car reamers.
    Hex Shank
    Image of Product. Front orientation. Contains Annotated. Reamers. Impact Wrench Reamers for Hole Alignment, Hex Shank, Spiral Flute.

    Spiral Flute

    The shank fits hex impact sockets, so you can use an impact wrench to both ream the hole and install a fastener.
    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.
    Strong Hold—Magnets on the shank’s end keep these reamers from accidentally falling out of your tool.
    Lg.
    Reamer Dia.
    (A)
    Reamer Dia.
    (B)
    Material
    Hex Shank
    Size
    Flute
    Overall
    Spiral
    Direction
    Cutting Dia.
    Tolerance
    Performance
    For Use On
    Mfr.
    Each
    Spiral Flute
     
    Inch
    0.4375" (7/16")0.2656"High-Speed Steel
    		1 1/4"4 3/8"7 1/8"Left Hand0" to 0.01"Strong HoldAluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelICS3239A47000000
     

    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
    Mfr.
    Each
    Pkg.
    Qty.
    Pkg.
    Each
    Straight Blade
    Image of Product. Front orientation. Reamers. Reamers, Adjustable Size, Square Shank, Straight Blade.
     
    Inch
    0.7188" to 0.7813" (23/32" to 25/32")High-Speed Steel
    		0.3430"7 1/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened SteelChadwick & Trefethen3141A15000000063141A4500000003004A17000000
     
    Angled Blade
    Image of Product. Front orientation. Reamers. Reamers, Adjustable Size, Square Shank, Angled Blade.
     
    Inch
    0.7188" to 0.7813" (23/32" to 25/32")Tool Steel
    		0.3430"7 1/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, TitaniumChadwick & Trefethen2987A1500000062987A55000003004A1700000
    0.7500" to 0.8125" (3/4" to 13/16")Tool Steel
    		0.3430"7 1/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, TitaniumChadwick & Trefethen2987A3400000062987A74000003004A1700000
     
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