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  5. Cutting Tools
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  7. Porting Tools & Counterbores

Porting Tools & Counterbores (993 items)

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
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
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
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
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
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 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
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
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
Cleveland Port Tool, 2.813" L, 0.250" dia., Bright C46894
Cleveland

Port Tool, 2.813" L, 0.250" dia., Bright

Zoro # G4777217
Mfr # C46894
product price: 
$122.99
/ea
Hhip M5 X 5.5mm HSS 3 Flute Straight Shank Solid Pilot Counterbore 2007-0057
Hhip

M5 X 5.5mm HSS 3 Flute Straight Shank Solid Pilot Counterbore

Zoro # G2468288
Mfr # 2007-0057
product price: 
$15.19
/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
Hhip 3/8 X 13/32 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0024
Hhip

3/8 X 13/32 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2468087
Mfr # 2007-0024
product price: 
$18.49
/ea
Drill America 1/4" X 1/8" Pilots for Counterbore DEWPIL1/4X1/8
Drill America

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

Zoro # G1744884
Mfr # DEWPIL1/4X1/8
product price: 
$7.49
/ea
Sold in mult. of 2 for $14.98
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Number of Flutes: 4 25524
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Number of Flutes: 4

Zoro # G7260297
Mfr # 25524
product price: 
$152.99
/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
Keo No 6 through 1/2" +1/32 Oversize Kounterbore Set 902-000-042
Keo

No 6 through 1/2" +1/32 Oversize Kounterbore Set

Zoro # G2600656
Mfr # 902-000-042
product price: 
$577.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16) 25528
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16)

Zoro # G7262756
Mfr # 25528
product price: 
$179.99
/ea
Hhip M6 X 6.6mm HSS 3 Flute Straight Shank Solid Pilot Counterbore 2007-0060
Hhip

M6 X 6.6mm HSS 3 Flute Straight Shank Solid Pilot Counterbore

Zoro # G2468184
Mfr # 2007-0060
product price: 
$16.59
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3125" (5/16) 23420-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3125" (5/16)

Zoro # G7155096
Mfr # 23420-C3
product price: 
$95.69
/ea
Drill America No 8 .163mm Machine Screw Solid Counterbore DEWCBRSOL8
Drill America

No 8 .163mm Machine Screw Solid Counterbore

Zoro # G1739695
Mfr # DEWCBRSOL8
product price: 
$13.29
/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
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Flute Length: 1" 25524-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Flute Length: 1"

Zoro # G7262126
Mfr # 25524-C3
product price: 
$166.99
/ea
Keo Counterbore Set, Close Fit, 7 PC, No 6-1/2 In 902-000-040
Keo

Counterbore Set, Close Fit, 7 PC, No 6-1/2 In

Zoro # G2382423
Mfr # 902-000-040
product price: 
$545.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1719" (11/64), Shank Dia.: 3/16" 23411
Harvey Tool

Counterbores - Flat Bottom, 0.1719" (11/64), Shank Dia.: 3/16"

Zoro # G7149329
Mfr # 23411
product price: 
$53.89
/ea
Keo Counterbore Set, Metric, 6 pcs., 3F, Medium 902-000-069
Keo

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

Zoro # G8925472
Mfr # 902-000-069
product price: 
$426.99
/ea
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, 0.0625" (1/16) 23362
Harvey Tool

Counterbores - Flat Bottom, 0.0625" (1/16)

Zoro # G7242858
Mfr # 23362
product price: 
$51.29
/ea
Keo Counterbore, 1/64 Clearance, Size 5/16, Co 902-000-020
Keo

Counterbore, 1/64 Clearance, Size 5/16, Co

Zoro # G0742113
Mfr # 902-000-020
product price: 
$81.85
/ea
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
Harvey Tool 3/16 Cutter dia. x .75  in. 3/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 23412-C8
Harvey Tool

3/16 Cutter dia. x .75 in. 3/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G711326403
Mfr # 23412-C8
product price: 
$61.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3150" 2348M
Harvey Tool

Counterbores - Flat Bottom, 0.3150"

Zoro # G7257314
Mfr # 2348M
product price: 
$98.19
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3937" 2340M
Harvey Tool

Counterbores - Flat Bottom, 0.3937"

Zoro # G7255290
Mfr # 2340M
product price: 
$117.99
/ea
Scientific Cutting Tools Port Tool, MS16142, Reamer, 3/4-16 UNF MS16142-8R
Scientific Cutting Tools

Port Tool, MS16142, Reamer, 3/4-16 UNF

Zoro # G7807396
Mfr # MS16142-8R
product price: 
$338.99
/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.

Related Categories

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PliersPrecision Measuring ToolsMeasuring and Layout ToolsScrewdrivers and NutdriversCutting and Shaping Tools
high speed steelmetric counterbore1" counterborecounter bore setscientific cutting tools
interchangeable pilot counterborecounter bore pilot1-1/4 in counterborecounterbores - flat bottommetric counterbore set

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