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  • Submicron carbide grade for increased wear resistance and toughness.
    • Unit of Measure

    Cutting Ø "D" (Inch)

    		 N/A 5/16

    Cutting Ø "D" (mm)

    		 N/A 7.938

    Dec. Equiv. (Inch)

    		 N/A 0.3125

    Overall Length "A" (Inch)

    		 N/A 4 1/2

    Overall Length "A" (mm)

    		 N/A 114

    Flute Length "B" (Inch)

    		 N/A 2 1/2

    Flute Length "B" (mm)

    		 N/A 64

    Usable Flute at Full Regrind "F" (Inch)

    		 N/A 1.7000

    Usable Flute at Full Regrind "F" (mm)

    		 N/A 44

    Shank Ø "C" (Inch)

    		 N/A 19/64

    Grind Down Range (Inch)

    		 N/A 0.2861 - 0.3170

    Grind Down Range (mm)

    		 N/A 7.267 - 8.052

    Ineffective Flute Length (Inch)

    		 N/A 0.4600

    Ineffective Flute Length (mm)

    		 N/A 12

    Cutting Diameter Tolerance (Inch)

    		 N/A +0.0000 -0.0015

    Cutting Diameter Tolerance (mm)

    		 N/A +0.000 -0.025

    Shank Diameter Tolerance (Inch)

    		 N/A +0.0000 -0.0015

    Shank Diameter Tolerance (mm)

    		 N/A +0.000 -0.038

    N/A

      Many customers are using the die drill configuration as a very effective reamer or core drill for producing close diameter smooth holes.
      Many years ago we discovered the sizing characteristics of the straight fluted die drill. However because the straight flute cannot "lift chips" out of the hole to the depth that can be drilled from solid it is limited to several diameters at most in vertical applications. That's why we developed the Koolcarb coolant feeding style drills. But in reaming or core drilling the die drill can be used to many more diameters deep than when drilling from solid.