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  7. Porting Tools & Counterbores

Porting Tools & Counterbores (993 items)

H & H Industrial Products 21 Piece High Speed Steel Interchangeable Pilot Counterbore Set 2007-0023
H & H Industrial Products

21 Piece High Speed Steel Interchangeable Pilot Counterbore Set

Zoro # G7177336
Mfr # 2007-0023
product price: 
$124.99
/ea
Hhip 7 Piece High Speed Steel 3 Flute Solid  Pilot Counterbore Set 2007-0002
Hhip

7 Piece High Speed Steel 3 Flute Solid Pilot Counterbore Set

Zoro # G2468175
Mfr # 2007-0002
product price: 
$104.99
/ea
Scientific Cutting Tools Port Tool, MS16142, Reamer, 9/16-18 UNF MS16142-6R
Scientific Cutting Tools

Port Tool, MS16142, Reamer, 9/16-18 UNF

Zoro # G8381073
Mfr # MS16142-6R
product price: 
$294.99
/ea
Drill America 3/4" X 3/16" HSS Aircraft Counterbore 1/4" Shank DEWA/CCBR3/4
Drill America

3/4" X 3/16" HSS Aircraft Counterbore 1/4" Shank

Zoro # G1745049
Mfr # DEWA/CCBR3/4
product price: 
$43.85
/ea
Drill America 3/8" X 5/32" Pilot Hole HSS Straight Shank Counterbore DEWCBR3/8
Drill America

3/8" X 5/32" Pilot Hole HSS Straight Shank Counterbore

Zoro # G1742504
Mfr # DEWCBR3/8
product price: 
$27.75
/ea
Hhip 1/4 X 9/32 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0016
Hhip

1/4 X 9/32 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2467938
Mfr # 2007-0016
product price: 
$15.99
/ea
Drill America 9/32" X 3/16" Pilots for Counterbore DEWPIL9/32X3/16
Drill America

9/32" X 3/16" Pilots for Counterbore

Zoro # G1743929
Mfr # DEWPIL9/32X3/16
product price: 
$8.19
/ea
Sold in mult. of 2 for $16.38
Drill America 7/32" X 5/32" Pilots for Counterbore DEWPIL7/32X5/32
Drill America

7/32" X 5/32" Pilots for Counterbore

Zoro # G1743019
Mfr # DEWPIL7/32X5/32
product price: 
$6.79
/ea
Sold in mult. of 2 for $13.58
Scientific Cutting Tools Port Tool, MS16142, Reamer, 7/8-14 UNF MS16142-10R
Scientific Cutting Tools

Port Tool, MS16142, Reamer, 7/8-14 UNF

Zoro # G8444396
Mfr # MS16142-10R
product price: 
$282.99
/ea
Hhip 1/2 X 17/32 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0032
Hhip

1/2 X 17/32 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2468069
Mfr # 2007-0032
product price: 
$20.79
/ea
Keo Counterbore, Fractional Inch, 4-1/2 in 902-000-016
Keo

Counterbore, Fractional Inch, 4-1/2 in

Zoro # G1107714
Mfr # 902-000-016
product price: 
$74.45
/ea
Drill America 7/16" HSS Solid Counterbore DEWCBRSOL7/16
Drill America

7/16" HSS Solid Counterbore

Zoro # G1745855
Mfr # DEWCBRSOL7/16
product price: 
$28.15
/ea
Drill America 1/2" X 3/8" Pilots for Counterbore DEWPIL1/2X3/8
Drill America

1/2" X 3/8" Pilots for Counterbore

Zoro # G1747176
Mfr # DEWPIL1/2X3/8
product price: 
$8.29
/ea
Drill America 3/8" X 1/4" Pilots for Counterbore DEWPIL3/8X1/4
Drill America

3/8" X 1/4" Pilots for Counterbore

Zoro # G1741366
Mfr # DEWPIL3/8X1/4
product price: 
$9.95
/ea
Sold in mult. of 2 for $19.90
Scientific Cutting Tools PortTool, 1-1/16"-12, 2-1/8in, Straight MS16142-12R
Scientific Cutting Tools

PortTool, 1-1/16"-12, 2-1/8in, Straight

Zoro # G8390681
Mfr # MS16142-12R
product price: 
$364.99
/ea
Hhip No 8 X 11/64" High Speed Steel 3 Flute Solid Pilot Counterbore 2007-0008
Hhip

No 8 X 11/64" High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2468053
Mfr # 2007-0008
product price: 
$14.79
/ea
Super Tool Reduced Shank Counterbore, 1/2" D 52216
Super Tool

Reduced Shank Counterbore, 1/2" D

Zoro # G0331340
Mfr # 52216
product price: 
$114.99
/ea
Super Tool Reduced Shank Counterbore, 1" D 52232
Super Tool

Reduced Shank Counterbore, 1" D

Zoro # G0331289
Mfr # 52232
product price: 
$141.99
/ea
Drill America 3/8" X 1/8" Pilots for Counterbore DEWPIL3/8X1/8
Drill America

3/8" X 1/8" Pilots for Counterbore

Zoro # G1745119
Mfr # DEWPIL3/8X1/8
product price: 
$7.55
/ea
Sold in mult. of 2 for $15.10
Harvey Tool Counterbores - Flat Bottom, 0.3437" (11/32) 23422-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3437" (11/32)

Zoro # G7157135
Mfr # 23422-C3
product price: 
$115.99
/ea
Scientific Cutting Tools PortTool, 1-5/16"-12, 2-1/4in, Straight SAEJ1926-16R
Scientific Cutting Tools

PortTool, 1-5/16"-12, 2-1/4in, Straight

Zoro # G8253831
Mfr # SAEJ1926-16R
product price: 
$362.99
/ea
No Product Image Available
Super Tool

Counterbore Pilot, 1/2 X 3/16

Zoro # G007386043
Mfr # 56226
product price: 
$39.49
/ea
Drill America 3/16" X 3/32" Pilots for Counterbore DEWPIL3/16X3/32
Drill America

3/16" X 3/32" Pilots for Counterbore

Zoro # G1746780
Mfr # DEWPIL3/16X3/32
product price: 
$6.25
/ea
Sold in mult. of 2 for $12.50
Hhip 5/16 X 11/32 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0020
Hhip

5/16 X 11/32 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2467904
Mfr # 2007-0020
product price: 
$18.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.4375" (7/16), Flute Length: 1" 23428
Harvey Tool

Counterbores - Flat Bottom, 0.4375" (7/16), Flute Length: 1"

Zoro # G7157485
Mfr # 23428
product price: 
$122.99
/ea
Drill America 9/16" X 5/16" Pilots for Counterbore DEWPIL9/16X5/16
Drill America

9/16" X 5/16" Pilots for Counterbore

Zoro # G1743980
Mfr # DEWPIL9/16X5/16
product price: 
$10.99
/ea
Super Tool Counterbore, 1" D, Carbide Tipped 59813
Super Tool

Counterbore, 1" D, Carbide Tipped

Zoro # G0330309
Mfr # 59813
product price: 
$148.99
/ea
Super Tool Reduced Shank Counterbore, 1/4" D 52208
Super Tool

Reduced Shank Counterbore, 1/4" D

Zoro # G0331541
Mfr # 52208
product price: 
$72.49
/ea
Hhip 6 Piece M4-M12 HSS 3 Flute Straight Shank Solid Pilot Counterbore Set 2007-0001
Hhip

6 Piece M4-M12 HSS 3 Flute Straight Shank Solid Pilot Counterbore Set

Zoro # G612482277
Mfr # 2007-0001
original price:  $54.29 , new price: $46.98 , 13 percent off
13% off
new price: 
$46.98
/ea
Keo Counterbore Set, Metric, 6 pcs., 3F, Fine 902-000-068
Keo

Counterbore Set, Metric, 6 pcs., 3F, Fine

Zoro # G8925463
Mfr # 902-000-068
product price: 
$381.99
/ea
Keo Counterbore Set, 7, Fractional Inch 902-000-293
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G621725273
Mfr # 902-000-293
product price: 
$647.99
/ea
Drill America 13/16" X 1/4" Pilot Hole HSS Taper Shank Counterbore DEWCBRTS13/16
Drill America

13/16" X 1/4" Pilot Hole HSS Taper Shank Counterbore

Zoro # G1746555
Mfr # DEWCBRTS13/16
product price: 
$40.59
/ea
Harvey Tool 0.2187 in. 7/32 Cutter dia x 0.75in. 3/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731614
Harvey Tool

0.2187 in. 7/32 Cutter dia x 0.75in. 3/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G511325170
Mfr # 731614
product price: 
$70.69
/ea
Link 6MM HSS Se 6.30 X 9.52 Drill 10.71 Cbore 7.94 Shank 39.69 Oal 75-L2-523
Link

6MM HSS Se 6.30 X 9.52 Drill 10.71 Cbore 7.94 Shank 39.69 Oal

Zoro # G7643766
Mfr # 75-L2-523
product price: 
$28.35
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1406" (9/64) 23409
Harvey Tool

Counterbores - Flat Bottom, 0.1406" (9/64)

Zoro # G7149338
Mfr # 23409
product price: 
$49.15
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1562" (5/32) 25510
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1562" (5/32)

Zoro # G7245195
Mfr # 25510
product price: 
$73.19
/ea
Porting Tools & Counterbores (993 items)
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About Porting Tools & Counterbores

Porting Tools & Counterbores are used to improve the flow of air or gas in an engine, turbine, compressor, and more. They are typically used to reduce turbulence in the airflow and increase performance.

Types of Porting Tools & Counterbores

Chainsaw porting tools are commonly used for small engines like lawnmowers, as they can be adjusted easily and quickly. Ported tools are designed for larger engines such as those found in cars and motorcycles. Porting supplies include special cutting tools that allow for precise modifications to be made with minimal effort.

How Porting Tools & Counterbores are Made

Porting tools are usually constructed from hardened steel or aluminum alloy materials that can withstand high temperatures and pressures associated with engine operations. Special compounds may also be applied during the manufacturing process to ensure optimal performance.

Industries that use Porting Tools & Counterbores

Porting Tools & Counterbores can be found in a variety of industries including automotive, aerospace, marine, industrial machinery, and power sports. Professionals such as mechanics, engineers, machinists, technicians often use these tools on the job.

Find the Porting Tools & Counterbores You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of Porting Tools & Counterbores along with other tools or equipment to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.

Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Frequently Asked Questions

A porting tool is a cutting tool used for enlarging and finishing the ports of an engine cylinder head or engine block.

A counterbore is a cutting tool used to enlarge the diameter of an existing hole to a specific depth, creating a larger hole with a flat bottom.

Porting tools and counterbores are typically made from high-quality materials such as carbide, hardened steel, or titanium to ensure durability and precision cutting.

Porting tools and counterbores offer several benefits, including increased engine performance, improved fuel efficiency, enhanced air and exhaust flow, and more precise and efficient machining.

Related Categories

Drill BitsTapsReamersEnd MillsWrenches
Precision Measuring ToolsPliersCutting and Shaping ToolsMeasuring and Layout ToolsSockets & Ratchets
interchangeable pilot counterborehigh speed steelcounter bore set1" counterborescientific cutting tools
pilot counterbore1-1/4 in counterborecounterbores - flat bottomcounter bore pilot5/8 counterbore

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