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  • Product Image- Style 172 Carbide Tip Koolcarb®, Extra Length Drill
  • Dimensional Drawing
Submicron carbide tip yields exceptional tool life in tool steels, cast and ductile irons, cast aluminum and other abrasive materials.
  • 125° four facet web thinned point starts best into a larger point angle. Not intended for interrupted cut drilling.
  • High speed “milled” body runs 2 to 4 times gun drill feeds on conventional equipment.
  • Longer carbide yields increased regrinds.
  • Straight flute, right hand cut.
  • Specials available to 1.535” (39.0 mm) Ø. Request intermediate sizes from grind down range.
  • Coolant feeding carbide tip Koolcarb construction provides straighter holes and smoother finish.
  • Shank Ø = Cutting Ø
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    Item #

    Cutting Ø "D" (Inch)

    Cutting Ø "D" (mm)

    Dec. Equiv. (Inch)

    Overall Length "A" (Inch)

    Overall Length "A" (mm)

    Flute Length "B" (Inch)

    Flute Length "B" (mm)

    Usable Flute at Full Regrind "F" (Inch)

    Usable Flute at Full Regrind "F" (mm)

    17202500 N/A 1/4 N/A 6.35 N/A 0.2500 N/A 10 N/A 254 N/A 8 N/A 203 N/A 7.2000 N/A 183
    17202812 N/A 9/32 N/A 7.142 N/A 0.2812 N/A 10 N/A 254 N/A 8 N/A 203 N/A 7.1000 N/A 181
    17203125 N/A 5/16 N/A 7.938 N/A 0.3125 N/A 10 N/A 254 N/A 8 N/A 203 N/A 7.1000 N/A 180
    17203438 N/A 11/32 N/A 8.733 N/A 0.3438 N/A 10 N/A 254 N/A 8 N/A 203 N/A 7.1000 N/A 180
    17203750 N/A 3/8 N/A 9.525 N/A 0.3750 N/A 11 N/A 279 N/A 9 N/A 229 N/A 8.1000 N/A 205
    17204062 N/A 13/32 N/A 10.317 N/A 0.4062 N/A 11 N/A 279 N/A 9 N/A 229 N/A 8.0000 N/A 204
    17204375 N/A 7/16 N/A 11.113 N/A 0.4375 N/A 11 N/A 279 N/A 9 N/A 229 N/A 7.9000 N/A 202
    17204688 N/A 15/32 N/A 11.908 N/A 0.4688 N/A 12 N/A 305 N/A 9 3/4 N/A 248 N/A 8.6000 N/A 219
    17205000 N/A 1/2 N/A 12.7 N/A 0.5000 N/A 12 N/A 305 N/A 9 3/4 N/A 248 N/A 8.6000 N/A 218
    17205312 N/A 17/32 N/A 13.492 N/A 0.5312 N/A 12 N/A 305 N/A 9 3/4 N/A 248 N/A 8.5000 N/A 216
    17205625 N/A 9/16 N/A 14.288 N/A 0.5625 N/A 13 N/A 330 N/A 10 3/4 N/A 273 N/A 9.5000 N/A 240
    17206250 N/A 5/8 N/A 15.875 N/A 0.6250 N/A 13 N/A 330 N/A 10 3/4 N/A 273 N/A 9.4000 N/A 239
    17207500 N/A 3/4 N/A 19.05 N/A 0.7500 N/A 14 N/A 356 N/A 11 3/4 N/A 298 N/A 10.2000 N/A 260
    17208750 N/A 7/8 N/A 22.225 N/A 0.8750 N/A 15 N/A 381 N/A 12 3/4 N/A 324 N/A 11.1000 N/A 281
    17210000 N/A 1 N/A 25.4 N/A 1.0000 N/A 16 N/A 406 N/A 13 3/4 N/A 349 N/A 12.0000 N/A 304
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