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Counterbore

Counterbore

Piloted counterbores allow you to accurately drill stocks with existing screw holes for pillar bedding, with no fear of the cutter wandering. Interchangeable pilots provide increased versatility, allowing two cutters to do the work of six. Makes adding pillar bedding blocks quick and easy. Pilots and cutters available in popular sizes to accommodate most bedding needs.

  • 4-cutting flutes
  • 1/4" drill shank
  • Removable pilot
  • Made of hardened high speed steel
  • Aircraft Tool Supply 4000-1016 1/4" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1016
    Diameter (D)
    1/4"
    Pilot Bore (P)
    3/32"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $19.39 (Each)
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    Aircraft Tool Supply 4000-1018 9/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1018
    Diameter (D)
    9/32"
    Pilot Bore (P)
    3/32"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $23.56 (Each)
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    Aircraft Tool Supply 4000-1020 5/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1020
    Diameter (D)
    5/16"
    Pilot Bore (P)
    3/32"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $19.39 (Each)
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    Aircraft Tool Supply 4000-1022 11/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1022
    Diameter (D)
    11/32"
    Pilot Bore (P)
    3/32"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $21.42 (Each)
    Qty
    Aircraft Tool Supply 4000-1024 3/8" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1024
    Diameter (D)
    3/8"
    Pilot Bore (P)
    3/32"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $25.92 (Each)
    Qty
    Aircraft Tool Supply 4000-1026 13/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1026
    Diameter (D)
    13/32"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $27.10 (Each)
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    Aircraft Tool Supply 4000-1028 7/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1028
    Diameter (D)
    7/16"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $22.31 (Each)
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    Aircraft Tool Supply 4000-1030 15/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1030
    Diameter (D)
    15/32"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $27.73 (Each)
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    Aircraft Tool Supply 4000-1032 1/2" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1032
    Diameter (D)
    1/2"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $29.46 (Each)
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    Aircraft Tool Supply 4000-1034 17/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1034
    Diameter (D)
    17/32"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $29.12 (Each)
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    Aircraft Tool Supply 4000-1036 9/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1036
    Diameter (D)
    9/16"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $38.91 (Each)
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    Aircraft Tool Supply 4000-1038 19/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1038
    Diameter (D)
    19/32"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $34.39 (Each)
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    Aircraft Tool Supply 4000-1040 5/8" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1040
    Diameter (D)
    5/8"
    Pilot Bore (P)
    1/8"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $34.95 (Each)
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    Aircraft Tool Supply 4000-1042 21/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1042
    Diameter (D)
    21/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $35.37 (Each)
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    Aircraft Tool Supply 4000-1044 11/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-1044
    Diameter (D)
    11/16"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Non-Orderable
    Aircraft Tool Supply 4000-16 23/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-16
    Diameter (D)
    23/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $48.56 (Each)
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    Aircraft Tool Supply 4000-17 3/4" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-17
    Diameter (D)
    3/4"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $51.48 (Each)
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    Aircraft Tool Supply 4000-18 25/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-18
    Diameter (D)
    25/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $52.46 (Each)
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    Aircraft Tool Supply 4000-19 13/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-19
    Diameter (D)
    13/16"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $63.28 (Each)
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    Aircraft Tool Supply 4000-20 27/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-20
    Diameter (D)
    27/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $56.34 (Each)
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    Aircraft Tool Supply 4000-21 7/8" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-21
    Diameter (D)
    7/8"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $56.34 (Each)
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    Aircraft Tool Supply 4000-22 29/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-22
    Diameter (D)
    29/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $58.28 (Each)
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    Aircraft Tool Supply 4000-23 15/16" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-23
    Diameter (D)
    15/16"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $58.28 (Each)
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    Aircraft Tool Supply 4000-24 31/32" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-24
    Diameter (D)
    31/32"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $71.06 (Each)
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    Aircraft Tool Supply 4000-25 1" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-25
    Diameter (D)
    1"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $74.82 (Each)
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    Aircraft Tool Supply 4000-26 1-1/4" Aircraft CounterboreView DetailsEnable JS
    Part Number
    4000-26
    Diameter (D)
    1-1/4"
    Pilot Bore (P)
    3/16"
    Shank (S)
    1/4"
    Overall Length
    2-3/4"
    Price
    $86.13 (Each)
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