Email: sales@a1tooling.com | Phone: (888) 988-8820
We ship from multiple warehouses throughout the USA
to get you what you need as fast as possible!
Millions of items in stock!
Fast online checkout - No account required
Cart 0
Cart 0

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

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

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

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 1-5/16" Head Diam, 3/8" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 1-5/16" Head Diam, 3/8" Shank Diam, Counterbore Pilot


Item #: 08907768
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 1-5/16
Shank Diameter (Inch) 3/8
Pilot Material Carbon Steel

$36.33

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Cleveland - 5/16" Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Cleveland - 5/16" Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 81852295
Brand: Cleveland
Model #: C92708

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 (Inch) 29/64
Fastener Size Compatibility (Inch) 5/16
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Inch) 7/16
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (Inch) 21/64
Shank Type Straight
Overall Length (mm) 152.40
Overall Length (Inch) 6
Overall Length (Decimal Inch) 6.00
Cutting Direction Forward
Material Application Alloy Tool Steel; Carbon Steel; Cast Iron

$130.15

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 1/4" Head Diam, 1/8" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 1/4" Head Diam, 1/8" Shank Diam, Counterbore Pilot


Item #: 08902165
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 1/4
Shank Diameter (Inch) 1/8
Pilot Material Carbon Steel

$9.87

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Scientific Cutting Tools - 7/16-20" Port, 0.888" Spotface Diam, 1/4" Tube Outside Diam, Plain Pilot, Carbide Tipped Porting Tool - A1 Tooling

Scientific Cutting Tools - 7/16-20" Port, 0.888" Spotface Diam, 1/4" Tube Outside Diam, Plain Pilot, Carbide Tipped Porting Tool


Item #: 44042422
Brand: Scientific Cutting Tools
Model #: AND10050-4SA

Features and Benefits

Carbide-tipped cuts faster than high speed steel. It is commonly used on ferrous and nonferrous materials including cast iron, steel and steel alloys.
Product Specifications
Port Standard Designation AND 10050
Pilot Type Plain
Port Thread Size (Decimal Inch) 0.4370-20
Port Thread Size (Inch) 7/16-20
Tool Material Carbide-Tipped
Tube Dash Number 4.000
Tube Outside Diameter Compatibility (Decimal Inch) 0.250
Tube Outside Diameter Compatibility (Inch) 1/4
Minimum Pilot Diameter (Decimal Inch) 0.3850
Maximum Pilot Diameter (Decimal Inch) 0.4565
Spotface Diameter (Decimal Inch) 0.8880
Pilot Length (Decimal Inch) 0.3620
Identification Groove No
Workpiece Compatibility Tubes
Finish/Coating AlTiN+
Head Length (Decimal Inch) 1.1200
Overall Length (Decimal Inch) 3.1200
Shank Diameter (Decimal Inch) 0.5000
Shank Length (Decimal Inch) 2.0000
Seal Angle 30
Thread Type UNF
Flute Type Straight
Number of Flutes 4

$144.79

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Scientific Cutting Tools - 2-1/2 - 12" Port, 3.52" Spotface Diam, 2" Tube Outside Diam, Plain Pilot, Carbide Tipped Porting Tool - A1 Tooling

Scientific Cutting Tools - 2-1/2 - 12" Port, 3.52" Spotface Diam, 2" Tube Outside Diam, Plain Pilot, Carbide Tipped Porting Tool


Item #: 44039725
Brand: Scientific Cutting Tools
Model #: AND10050-32SA

Features and Benefits

Carbide-tipped cuts faster than high speed steel. It is commonly used on ferrous and nonferrous materials including cast iron, steel and steel alloys.
Product Specifications
Port Standard Designation AND 10050
Pilot Type Plain
Port Thread Size (Decimal Inch) 2.5000-12
Port Thread Size (Inch) 2-1/2 - 12
Tool Material Carbide-Tipped
Tube Dash Number 32.000
Tube Outside Diameter Compatibility (Decimal Inch) 2.000
Tube Outside Diameter Compatibility (Inch) 2
Minimum Pilot Diameter (Decimal Inch) 2.4120
Maximum Pilot Diameter (Decimal Inch) 2.5265
Spotface Diameter (Decimal Inch) 3.5200
Pilot Length (Decimal Inch) 0.6670
Identification Groove No
Workpiece Compatibility Tubes
Finish/Coating AlTiN+
Head Length (Decimal Inch) 2.1000
Overall Length (Decimal Inch) 4.6000
Shank Diameter (Decimal Inch) 1.2500
Shank Length (Decimal Inch) 2.5000
Seal Angle 30
Thread Type UN
Flute Type Straight
Number of Flutes 4

$453.61

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Made in USA - 1-1/16" Diam, 3 Flutes, Morse Taper Shank, Interchangeable Pilot Counterbore - A1 Tooling

Made in USA - 1-1/16" Diam, 3 Flutes, Morse Taper Shank, Interchangeable Pilot Counterbore


Item #: 78811049
Brand: Made in USA
Model #:

Features and Benefits

Carbide tips cuts faster than high speed steel. It is commonly used on ferrous and nonferrous materials including cast iron, steel and steel alloys.
Product Specifications
Counterbore Diameter (Inch) 1-1/16
Pilot Shank Diameter Compatibility (Inch) 5/16
Pilot Shank Diameter Compatibility (Decimal Inch) 0.3125
Finish/Coating Bright
Counterbore Material Carbide-Tipped
Number of Flutes 3
Shank Type Morse Taper
Aircraft-Style No
Shank Taper Designation 3MT
Overall Length (Inch) 6-3/8
Cutting Direction Forward
Material Application Cast Iron; Composites; Non-Ferrous Metals; Non-Metals; Plastics

$315.84

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It