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Holemaking Products - Counterbores & Porting Tools For Sale | A1 Tooling - (1669 Products)

Made in USA - 4 Flutes, 1" Diam, 3/8" Pilot Hole Diam, Solid Carbide Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 1" Diam, 3/8" Pilot Hole Diam, Solid Carbide Reverse Counterbore


Item #: 09938192
Brand: Made in USA
Model #:

Features and Benefits

Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough-to-machine materials.
Product Specifications
Counterbore Diameter (Inch) 1
Pilot Hole Diameter (Inch) 3/8
Counterbore Material Solid Carbide
Standard Pilot Model Number Compatibility 185-7
Oversize Pilot Model Number Compatibility 186-10
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/64
Aircraft-Style No

$251.10

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Made in USA - 4 Flutes, 5/16" Diam, 3/32" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 5/16" Diam, 3/32" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937152
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 5/16
Pilot Hole Diameter (Inch) 3/32
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-1
Oversize Pilot Model Number Compatibility 186-1
Number of Flutes 4
Overall Length (Inch) 1/2
Corner Radius (Inch) 1/32
Aircraft-Style No

$30.67

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Made in USA - 4 Flutes, 1/4" Diam, 1/8" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 1/4" Diam, 1/8" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937145
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 1/4
Pilot Hole Diameter (Inch) 1/8
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-2
Oversize Pilot Model Number Compatibility 186-2
Number of Flutes 4
Overall Length (Inch) 1/2
Corner Radius (Inch) 1/32
Aircraft-Style No

$31.01

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Made in USA - 4 Flutes, 5/8" Diam, 3/16" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 5/8" Diam, 3/16" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937301
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 5/8
Pilot Hole Diameter (Inch) 3/16
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-4
Oversize Pilot Model Number Compatibility 186-7
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$40.47

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Made in USA - 4 Flutes, 11/16" Diam, 1/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 11/16" Diam, 1/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937343
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 11/16
Pilot Hole Diameter (Inch) 1/4
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-5
Oversize Pilot Model Number Compatibility 186-8
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$41.79

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Made in USA - 4 Flutes, 7/8" Diam, 1/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 7/8" Diam, 1/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937392
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 7/8
Pilot Hole Diameter (Inch) 1/4
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-5
Oversize Pilot Model Number Compatibility 186-8
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$91.47

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Made in USA - 4 Flutes, 7/8" Diam, 1/4" Pilot Hole Diam, Solid Carbide Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 7/8" Diam, 1/4" Pilot Hole Diam, Solid Carbide Reverse Counterbore


Item #: 09938150
Brand: Made in USA
Model #:

Features and Benefits

Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough-to-machine materials.
Product Specifications
Counterbore Diameter (Inch) 7/8
Pilot Hole Diameter (Inch) 1/4
Counterbore Material Solid Carbide
Standard Pilot Model Number Compatibility 185-5
Oversize Pilot Model Number Compatibility 186-8
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/64
Aircraft-Style No

$245.20

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Made in USA - 4 Flutes, 2" Diam, 3/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 2" Diam, 3/4" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937541
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 2
Pilot Hole Diameter (Inch) 3/4
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-10
Oversize Pilot Model Number Compatibility 186-22; 186-23; 186-24
Number of Flutes 4
Overall Length (Inch) 1
Corner Radius (Inch) 1/32
Aircraft-Style No

$243.58

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Made in USA - 4 Flutes, 5/8" Diam, 5/16" Pilot Hole Diam, Solid Carbide Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 5/8" Diam, 5/16" Pilot Hole Diam, Solid Carbide Reverse Counterbore


Item #: 09938085
Brand: Made in USA
Model #:

Features and Benefits

Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough-to-machine materials.
Product Specifications
Counterbore Diameter (Inch) 5/8
Pilot Hole Diameter (Inch) 5/16
Counterbore Material Solid Carbide
Standard Pilot Model Number Compatibility 185-6
Oversize Pilot Model Number Compatibility 186-9
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/64
Aircraft-Style No

$160.04

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Made in USA - 4 Flutes, 9/16" Diam, 5/32" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 9/16" Diam, 5/32" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937277
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 9/16
Pilot Hole Diameter (Inch) 5/32
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-3
Oversize Pilot Model Number Compatibility 186-6
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$35.45

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Made in USA - 4 Flutes, 3/4" Diam, 3/8" Pilot Hole Diam, Solid Carbide Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 3/4" Diam, 3/8" Pilot Hole Diam, Solid Carbide Reverse Counterbore


Item #: 09938143
Brand: Made in USA
Model #:

Features and Benefits

Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough-to-machine materials.
Product Specifications
Counterbore Diameter (Inch) 3/4
Pilot Hole Diameter (Inch) 3/8
Counterbore Material Solid Carbide
Standard Pilot Model Number Compatibility 185-7
Oversize Pilot Model Number Compatibility 186-10
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/64
Aircraft-Style No

$203.64

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Made in USA - 4 Flutes, 11/16" Diam, 5/16" Pilot Hole Diam, Solid Carbide Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 11/16" Diam, 5/16" Pilot Hole Diam, Solid Carbide Reverse Counterbore


Item #: 09938119
Brand: Made in USA
Model #:

Features and Benefits

Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough-to-machine materials.
Product Specifications
Counterbore Diameter (Inch) 11/16
Pilot Hole Diameter (Inch) 5/16
Counterbore Material Solid Carbide
Standard Pilot Model Number Compatibility 185-6
Oversize Pilot Model Number Compatibility 186-9
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/64
Aircraft-Style No

$164.74

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Made in USA - 4 Flutes, 1-1/4" Diam, 1/2" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 1-1/4" Diam, 1/2" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937483
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 1-1/4
Pilot Hole Diameter (Inch) 1/2
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-8
Oversize Pilot Model Number Compatibility 186-17
Number of Flutes 4
Overall Length (Inch) 7/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$133.32

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Made in USA - 4 Flutes, 3/4" Diam, 3/8" Pilot Hole Diam, High Speed Steel Reverse Counterbore - A1 Tooling

Made in USA - 4 Flutes, 3/4" Diam, 3/8" Pilot Hole Diam, High Speed Steel Reverse Counterbore


Item #: 09937384
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 3/4
Pilot Hole Diameter (Inch) 3/8
Counterbore Material High Speed Steel
Standard Pilot Model Number Compatibility 185-7
Oversize Pilot Model Number Compatibility 186-10
Number of Flutes 4
Overall Length (Inch) 5/8
Corner Radius (Inch) 1/32
Aircraft-Style No

$58.60

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Cleveland - 3/32" Head Diam, 3/32" Shank Diam, Counterbore Pilot - A1 Tooling

Cleveland - 3/32" Head Diam, 3/32" Shank Diam, Counterbore Pilot


Item #: 63676746
Brand: Cleveland
Model #: C46520

Product Specifications
Head Diameter (Inch) 3/32
Shank Diameter (Inch) 3/32
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel
Material Application Alloy Tool Steel; Aluminum; Cast Iron; Low Carbon Steel; Medium Carbon Steel

$25.45

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Union Butterfield - 1/4" Head Diam, 3/16" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 1/4" Head Diam, 3/16" Shank Diam, Counterbore Pilot


Item #: 65707382
Brand: Union Butterfield
Model #: 3210125

Product Specifications
Head Diameter (Inch) 1/4
Shank Diameter (Inch) 3/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$42.93

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Cleveland - 9/32" Head Diam, 3/16" Shank Diam, Counterbore Pilot - A1 Tooling

Cleveland - 9/32" Head Diam, 3/16" Shank Diam, Counterbore Pilot


Item #: 63677256
Brand: Cleveland
Model #: C46566

Product Specifications
Head Diameter (Inch) 9/32
Shank Diameter (Inch) 3/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel
Material Application Alloy Tool Steel; Aluminum; Cast Iron; Low Carbon Steel; Medium Carbon Steel

$30.18

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Cleveland - 1-1/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - A1 Tooling

Cleveland - 1-1/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot


Item #: 63678130
Brand: Cleveland
Model #: C46716

Product Specifications
Head Diameter (Inch) 1-1/16
Shank Diameter (Inch) 7/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel
Material Application Alloy Tool Steel; Aluminum; Cast Iron; Low Carbon Steel; Medium Carbon Steel

$94.29

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Value Collection - 1" Compatible High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Value Collection - 1" Compatible High Speed Steel, Solid Pilot Counterbore


Item #: 08861643
Brand: Value Collection
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Product Specifications
Counterbore Diameter (Inch) 1-9/16
Fastener Size Compatibility (Inch) 1
Counterbore Material High Speed Steel
Standard or Oversize Pilot Standard
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (Inch) 1-1/16
Shank Type Morse Taper
Shank Taper Designation 3MT
Cutting Direction Forward

$240.59

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Made in USA - 6mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Made in USA - 6mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 01570019
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (mm) 11.00
Fastener Size Compatibility (mm) 6.00
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Inch) 3/8
Shank Diameter (mm) 9.53
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (mm) 6.60
Shank Type Straight
Overall Length (mm) 127.00
Overall Length (Inch) 5
Cutting Direction Forward

$71.21

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