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    4 Products
    About Drill Bits
    industrial info icon

    Compare material, finish, length class, and decimal size equivalents.

    Nonsparking Drill Bits

    Image of Product. Front orientation. Drill Bits. Nonsparking Drill Bits, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

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

    Standard

    Drill safely in flammable environments. Made of beryllium copper, these bits won’t create sparks that could ignite upon contact with combustible vapors or residues. They're Factory Mutual (FM) approved and help you meet OSHA requirements in areas where flammable materials are present.
    Do not use these bits in direct contact with acetylene. Dust from beryllium copper can be toxic, so don't grind or sharpen them.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    3/8"
    		0.375"
    		6 5/16"3.35"Round
    		3/8"Standard
    		Aven Tool7170N1220000000
     

    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
    Mfr.
    Each
    Helix Flute
     
    Inch
    70.4220"0.3297"High-Speed Steel
    		4 7/16"6 5/16"3Left Hand-0.001" to 0.001"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelAlvord-Polk Tool2991A250000000
     
    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
    Mfr.
    Each
    Straight Flute
     
    Inch
    70.4220"0.3297"High-Speed Steel
    		0.3050"4 7/16"6 5/16"6—-0.001" to 0.001"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelAlvord-Polk Tool2990A25000000
     
    Spiral Flute
     
    Inch
    70.4220"0.3297"High-Speed Steel
    		0.3050"4 7/16"6 5/16"6Left Hand-0.001" to 0.001"1:48Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, SteelAlvord-Polk Tool2990A5500000
     
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