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HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant
HPR • K256 • 8 x D • Internal Coolant

HPR Drill• K256 • 8 x D • Internal Coolant • HA Shank

HPR • K256 • 8 x D • Internal Coolant

Uses and application

  • DrillingDrilling
  • Drilling: Inclined ExitDrilling: Inclined Exit
  • Drilling: Stacked PlatesDrilling: Stacked Plates
  • Drilling: Cross-Hole DrillingDrilling: Cross-Hole Drilling

Workpiece Materials

P Steel
K Cast Iron
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Workpiece Material
Workpiece Material
  • P Steel (18)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (18)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (18)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS
      (18)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS
      (18)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS
      (18)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS
      (18)
    • P6
      High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS
      (18)
  • K Cast Iron (18)
    • K1
      Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS
      (18)
    • K2
      Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS
      (18)
    • K3
      High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS
      (18)
Applications
Applications
  • Cross Hole Drilling Cross Hole Drilling (18)
  • Drilling Drilling (18)
  • Inclined Exit Drilling Inclined Exit Drilling (18)
  • Stacked Plates Drilling Stacked Plates Drilling (18)
Cutting Diameter
Cutting Diameter
  • 3.175 mm (1)
  • 4.7625 mm (1)
  • 5.5575 mm (1)
  • 6.35 mm (1)
  • 7.0 mm (1)
  • 7.145 mm (1)
  • 7.9375 mm (1)
  • 8.3337 mm (1)
  • 8.7325 mm (1)
  • 9.1288 mm (1)
  • 9.525 mm (1)
  • 9.9212 mm (1)
  • 10.32 mm (1)
  • 10.7163 mm (1)
  • 11.1125 mm (1)
  • 11.5087 mm (1)
  • 12.7 mm (1)
  • 14.2875 mm (1)
Cutting Diameter Min to Cutting Diameter Max
Cutting Diameter
Cutting Diameter
  • 0.125 in (1)
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  • 0.4219 in (1)
  • 0.4375 in (1)
  • 0.4531 in (1)
  • 0.5 in (1)
  • 0.5625 in (1)
Cutting Diameter Min to Cutting Diameter Max
Maximum Hole Depth [L4]
Maximum Hole Depth [L4]
  • 1.25 in (1)
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  • 2.0 in (2)
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  • 3.0 in (4)
  • 3.5 in (4)
  • 4.0 in (2)
  • 4.5 in (1)
Maximum Hole Depth [L4] Min to Maximum Hole Depth [L4] Max
Maximum Hole Depth [L4]
Maximum Hole Depth [L4]
  • 31.75 mm (1)
  • 38.1 mm (1)
  • 50.8 mm (2)
  • 63.5 mm (3)
  • 76.2 mm (4)
  • 88.9 mm (4)
  • 101.6 mm (2)
  • 114.3 mm (1)
Maximum Hole Depth [L4] Min to Maximum Hole Depth [L4] Max
Reach
Reach
  • 37.084 mm (1)
  • 44.958 mm (1)
  • 58.928 mm (2)
  • 72.898 mm (3)
  • 87.884 mm (4)
  • 102.108 mm (4)
  • 116.078 mm (2)
  • 130.048 mm (1)
Reach Min to Reach Max
Reach
Reach
  • 1.46 in (1)
  • 1.77 in (1)
  • 2.32 in (2)
  • 2.87 in (3)
  • 3.46 in (4)
  • 4.02 in (4)
  • 4.57 in (2)
  • 5.12 in (1)
Reach Min to Reach Max
Back-End
Back-End Diameter
Back-End Diameter
  • 0.1875 in (2)
  • 0.25 in (2)
  • 0.3125 in (3)
  • 0.375 in (4)
  • 0.4375 in (4)
  • 0.5 in (2)
  • 0.5625 in (1)
Back-End Diameter Min to Back-End Diameter Max
Back-End Diameter
Back-End Diameter
  • 4.7625 mm (2)
  • 6.35 mm (2)
  • 7.9375 mm (3)
  • 9.525 mm (4)
  • 11.1125 mm (4)
  • 12.7 mm (2)
  • 14.2875 mm (1)
Back-End Diameter Min to Back-End Diameter Max
other
Over All Length [L]
Over All Length [L]
  • 76.2 mm (1)
  • 84.582 mm (1)
  • 98.552 mm (2)
  • 114.554 mm (3)
  • 131.572 mm (4)
  • 147.574 mm (4)
  • 164.592 mm (2)
  • 178.562 mm (1)
Over All Length [L] Min to Over All Length [L] Max
Over All Length [L]
Over All Length [L]
  • 3.0 in (1)
  • 3.33 in (1)
  • 3.88 in (2)
  • 4.51 in (3)
  • 5.18 in (4)
  • 5.81 in (4)
  • 6.48 in (2)
  • 7.03 in (1)
Over All Length [L] Min to Over All Length [L] Max
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SAP Material Number ISO Catalog Number ANSI Catalog Number Grade [D1] Drill Diameter M [D1] Drill Diameter M [D1] Wire Size [L] Overall Length [L] Overall Length [L3] Flute Length [L3] Flute Length [L4] Maximum Drilling Depth [L4] Maximum Drilling Depth [L5] Drill Point Length [L5] Drill Point Length [LS] Shank Length [LS] Shank Length [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter
6782608 K256A02188HPR K256A02188HPR KCK10A 5.5575 .2188   98.5520 3.880 58.9280 2.320 50.8000 2.000 1.6300 .0642 36.513 1.437 6.35 .25
    List price:
    $220.00 /each.
    Your price::
    Qty
    6782616 K256A03750HPR K256A03750HPR KCK10A 9.5250 .3750   131.5720 5.180 87.8840 3.460 76.2000 3.000 2.8000 .1102 40.386 1.59 9.525 .375
      List price:
      $326.00 /each.
      Your price::
      Qty
      6782611 K256A02813HPR K256A02813HPR KCK10A 7.1450 .2813   114.5540 4.510 72.8980 2.870 63.5000 2.500 2.1000 .0827 38.608 1.52 7.9375 .3125
        List price:
        $289.50 /each.
        Your price::
        Qty
        6782617 K256A03906HPR K256A03906HPR KCK10A 9.9212 .3906   147.5740 5.810 102.1080 4.020 88.9000 3.500 2.9100 .1146 42.418 1.67 11.1125 .4375
          List price:
          $326.00 /each.
          Your price::
          Qty
          6782612 K256A03125HPR K256A03125HPR KCK10A 7.9375 .3125   114.5540 4.510 72.8980 2.870 63.5000 2.500 2.3300 .0917 38.608 1.52 7.9375 .3125
            List price:
            $289.50 /each.
            Your price::
            Qty
            6782615 K256A03594HPR K256A03594HPR KCK10A 9.1288 .3594   131.5720 5.180 87.8840 3.460 76.2000 3.000 2.6800 .1055 40.386 1.59 9.525 .375
              List price:
              $326.00 /each.
              Your price::
              Qty
              6782614 K256A03438HPR K256A03438HPR KCK10A 8.7325 .3438   131.5720 5.180 87.8840 3.460 76.2000 3.000 2.5600 .1008 40.386 1.59 9.525 .375
                List price:
                $326.00 /each.
                Your price::
                Qty
                6782606 K256A01250HPR K256A01250HPR KCK10A 3.1750 .1250   76.2000 3.000 37.0840 1.460 31.7500 1.250 0.9300 .0366 36.513 1.437 4.7625 .1875
                  List price:
                  $220.00 /each.
                  Your price::
                  Qty
                  6782607 K256A01875HPR K256A01875HPR KCK10A 4.7625 .1875   84.5820 3.330 44.9580 1.770 38.1000 1.500 1.4000 .0551 36.513 1.437 4.7625 .1875
                    List price:
                    $220.00 /each.
                    Your price::
                    Qty
                    6782631 K256A04531HPR K256A04531HPR KCK10A 11.5087 .4531   164.5920 6.480 116.0780 4.570 101.6000 4.000 3.3800 .1331 45.466 1.79 12.7 .5
                      List price:
                      $439.50 /each.
                      Your price::
                      Qty
                      6782609 K256A02500HPR K256A02500HPR KCK10A 6.3500 .2500 E 98.5520 3.880 58.9280 2.320 50.8000 2.000 1.8600 .0732 36.513 1.437 6.35 .25
                        List price:
                        $289.50 /each.
                        Your price::
                        Qty
                        6782618 K256A04063HPR K256A04063HPR KCK10A 10.3200 .4063   147.5740 5.810 102.1080 4.020 88.9000 3.500 3.0300 .1193 42.418 1.67 11.1125 .4375
                          List price:
                          $439.50 /each.
                          Your price::
                          Qty
                          6782610 K256A02756HPR K256A02756HPR KCK10A 7.0000 .2756   114.5540 4.510 72.8980 2.870 63.5000 2.500 2.0500 .0807 38.608 1.52 7.9375 .3125
                            List price:
                            $289.50 /each.
                            Your price::
                            Qty
                            6782613 K256A03281HPR K256A03281HPR KCK10A 8.3337 .3281   131.5720 5.180 87.8840 3.460 76.2000 3.000 2.4500 .0965 40.386 1.59 9.525 .375
                              List price:
                              $326.00 /each.
                              Your price::
                              Qty
                              6782634 K256A05625HPR K256A05625HPR KCK10A 14.2875 .5625   178.5620 7.030 130.0480 5.120 114.3000 4.500 4.1900 .1650 45.466 1.79 14.2875 .5625
                                List price:
                                $788.00 /each.
                                Your price::
                                Qty
                                6782619 K256A04219HPR K256A04219HPR KCK10A 10.7163 .4219   147.5740 5.810 102.1080 4.020 88.9000 3.500 3.1400 .1236 42.418 1.67 11.1125 .4375
                                  List price:
                                  $439.50 /each.
                                  Your price::
                                  Qty
                                  6782632 K256A05000HPR K256A05000HPR KCK10A 12.7000 .5000   164.5920 6.480 116.0780 4.570 101.6000 4.000 3.7300 .1469 45.466 1.79 12.7 .5
                                    List price:
                                    $595.00 /each.
                                    Your price::
                                    Qty
                                    6782620 K256A04375HPR K256A04375HPR KCK10A 11.1125 .4375   147.5740 5.810 102.1080 4.020 88.9000 3.500 3.2600 .1283 42.418 1.67 11.1125 .4375
                                      List price:
                                      $439.50 /each.
                                      Your price::
                                      Qty
                                      List price:
                                      Discount: %
                                      Your price::
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                                      Replacement Product This item may be available through a distributor
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                                      Sold in pkg. of

                                      Grades

                                      • KCK10A
                                        P Steel
                                        K Cast Iron
                                      • HPR Drill - Solid Carbide Drill for Cast Iron

                                        HPR Drill - Solid Carbide Drill for Cast Iron

                                      • HPR Drill: Cross-Hole Craziness

                                        HPR Drill: Cross-Hole Craziness

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