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    6 Products

    Reduced-Shank Hole-Enlarging Drill Bits

    A simple way to enlarge an existing drilled hole, these bits are an economical alternative to reamers. They have four flutes that won’t catch on the inside of the hole like standard two-flute bits can, avoiding damage to the hole and your tool. The shank has a smaller diameter than the cutting tip, so you can ream large holes using tools that have standard-size chucks.
    Tool Steel
    Image of Product. Front orientation. Contains Annotated. Drill Bits. Reduced-Shank Hole-Enlarging Drill Bits, Spiral Flute.

    Spiral Flute

    Shank
    Drill Bit
    Size
    Overall
    Lg.
    Max. Drilling
    Dp.
    Flute
    Type
    Type
    Dia.
    No. of
    Flutes
    Flute
    Lg.
    Each
    Black Oxide
     
    Inch
    3/8"4.31"1.75"SpiralReduced Round3/8"41.875"00000000000000
    1/2"4.31"1.75"SpiralReduced Round1/2"41.875"0000000000000
    9/16"4.31"1.75"SpiralReduced Round1/2"41.875"0000000000000
    5/8"4.31"1.75"SpiralReduced Round1/2"41.875"0000000000000
    11/16"4.31"1.75"SpiralReduced Round1/2"41.875"0000000000000
    3/4"4.31"1.75"SpiralReduced Round1/2"41.875"0000000000000
     
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