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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
    33/64"
    		0.5156"
    		6 5/8"4.03"Round
    		33/64"Standard
    		Chicago-Latrobe2931A44000000
    17/32"
    		0.5313"
    		6 5/8"4.01"Round
    		17/32"Standard
    		Chicago-Latrobe2931A4500000
    35/64"
    		0.5469"
    		6 5/8"3.99"Round
    		35/64"Standard
    		Chicago-Latrobe2931A4600000
    9/16"
    		0.5625"
    		6 5/8"3.96"Round
    		9/16"Standard
    		Chicago-Latrobe2931A4700000
    37/64"
    		0.5781"
    		6 5/8"3.94"Round
    		37/64"Standard
    		Chicago-Latrobe2931A4800000
     
    Titanium Nitride (TiN) Coated
    33/64"
    		0.5156"
    		6 5/8"4.03"Round
    		33/64"Standard
    		Chicago-Latrobe3022A6300000
    17/32"
    		0.5313"
    		6 5/8"4.01"Round
    		17/32"Standard
    		Chicago-Latrobe3022A6400000
    35/64"
    		0.5469"
    		6 5/8"3.99"Round
    		35/64"Standard
    		Chicago-Latrobe3022A6500000
    9/16"
    		0.5625"
    		6 5/8"3.96"Round
    		9/16"Standard
    		Chicago-Latrobe3022A6600000
    37/64"
    		0.5781"
    		6 5/8"3.94"Round
    		37/64"Standard
    		Chicago-Latrobe3022A6700000
     
    Uncoated
    33/64"
    		0.5156"
    		6 5/8"4.03"Round
    		33/64"Standard
    		Viking Norseman Drill8870A4600000
    17/32"
    		0.5313"
    		6 5/8"4.01"Round
    		17/32"Standard
    		Viking Norseman Drill8870A4700000
    35/64"
    		0.5469"
    		6 5/8"3.99"Round
    		35/64"Standard
    		Viking Norseman Drill8870A4800000
    9/16"
    		0.5625"
    		6 5/8"3.96"Round
    		9/16"Standard
    		Viking Norseman Drill8870A4900000
    37/64"
    		0.5781"
    		6 5/8"3.94"Round
    		37/64"Standard
    		Viking Norseman Drill8870A5100000
     

    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
    33/64"
    		0.5156"
    		6 5/8"4.81"Round
    		33/64"Split
    		Dormer Pramet27995A543000000
    17/32"
    		0.5313"
    		6 5/8"4.81"Round
    		17/32"Split
    		Dormer Pramet27995A54400000
    35/64"
    		0.5469"
    		6 5/8"4.81"Round
    		35/64"Split
    		Dormer Pramet27995A54500000
    9/16"
    		0.5625"
    		6 5/8"4.81"Round
    		9/16"Split
    		Dormer Pramet27995A54600000
    37/64"
    		0.5781"
    		6 5/8"4.81"Round
    		37/64"Split
    		Dormer Pramet27995A54700000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    9/16"
    		0.5625"
    		6 5/8"3.64"Round
    		9/16"Split
    		Guhring2753A157000000
     
    Uncoated
    33/64"
    		0.5156"
    		6 5/8"4"Round
    		33/64"Split
    		Chicago-Latrobe3069A8100000
    17/32"
    		0.5313"
    		6 5/8"4"Round
    		17/32"Split
    		Chicago-Latrobe3069A8200000
    35/64"
    		0.5469"
    		6 5/8"4"Round
    		35/64"Split
    		Chicago-Latrobe3069A8300000
    9/16"
    		0.5625"
    		6 5/8"3.9"Round
    		9/16"Split
    		Chicago-Latrobe3069A8400000
    37/64"
    		0.5781"
    		6 5/8"3.9"Round
    		37/64"Split
    		Chicago-Latrobe3069A8500000
     

    Carbide-Tipped Drill Bits for Masonry and Concrete

    Crush rather than cut material so bits don’t jam or overheat while drilling masonry and concrete. The ultra-hard carbide tip breaks masonry into pieces and the widely spaced flutes channel them out of the hole. These bits stay sharp, resisting wear and heat that will dull or break other bits.
    SDS-Plus Shank for Hammer and Rotary Drilling
    Image of Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits for Masonry and Concrete, SDS-Plus Shank for Hammer and Rotary Drilling.
    Image of Specification. SDS-Plus Shank. Front orientation. SDS Plus Shank.

    SDS-Plus

    Shank

    The slotted shank fits SDS-Plus-drive rotary hammers, which rotate and hammer bits simultaneously to penetrate material. Also known as percussion or impact bits.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Specs. Met
    Mfr.
    Each
    Uncoated
     
    Standard Point
    7/32"
    		0.2188"
    		6 5/8"4"ANSI B212.15Tru-Cut8948A5600000
    5/16"
    		0.3125"
    		6 5/8"4"ANSI B212.15Tru-Cut8948A140000
    3/8"
    		0.375"
    		6 5/8"4"ANSI B212.15Tru-Cut8948A170000
    7/16"
    		0.4375"
    		6 5/8"4"ANSI B212.15Tru-Cut8948A2200000
    1/2"
    		0.5"
    		6 5/8"4"ANSI B212.15Tru-Cut8948A2500000
     

    High-Speed Steel Drill Bits for Plastic

    The precision-ground, 60° point penetrates gradually to prevent cracking and chipping. It also reduces heat that can deform the material. Use these bits for drilling into acrylic, laminate, and other plastics. They're made of wear-resistant high-speed steel.
    Jobbers' LengthAbout Jobbers' Length
    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits for Plastic, Jobbers' Length.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Point
    Angle
    Drill Bit
    Point Type
    Mfr.
    Each
    Uncoated
    33/64"
    		0.5156"
    		6 5/8"2.12"Round
    		1/2"60°Standard
    		ICS27465A69000000
    17/32"
    		0.5313"
    		6 5/8"2.12"Round
    		1/2"60°Standard
    		ICS27465A7100000
    35/64"
    		0.5469"
    		6 5/8"2.12"Round
    		1/2"60°Standard
    		ICS27465A7200000
    9/16"
    		0.5625"
    		6 5/8"2.12"Round
    		1/2"60°Standard
    		ICS27465A7300000
     

    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
    0.5938" to 0.6563" (19/32" to 21/32")High-Speed Steel
    		0.2810"6 5/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened SteelChadwick & Trefethen3141A14000000063141A4300000003004A15000000
     
    Angled Blade
    Image of Product. Front orientation. Reamers. Reamers, Adjustable Size, Square Shank, Angled Blade.
     
    Inch
    0.5938" to 0.6563" (19/32" to 21/32")Tool Steel
    		0.2810"6 5/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, TitaniumChadwick & Trefethen2987A1300000062987A53000003004A1500000
    0.6250" to 0.6875" (5/8" to 11/16")Tool Steel
    		0.2810"6 5/8"6Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, TitaniumChadwick & Trefethen2987A3200000062987A72000003004A1500000
     
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