Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Deals
  • Contact Us
Added to Cart
Skip to Main Content Accessibility Statement
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
User Headset Icon User Headset Icon Support
0
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Tools & Machining
  4. /
  5. Cutting Tools
  6. /
  7. Porting Tools & Counterbores

Porting Tools & Counterbores (993 items) - Page 16

Internal Tool A Nc-500-500 N/C Counterbore 85-5001
Internal Tool

A Nc-500-500 N/C Counterbore

Zoro # G900402536
Mfr # 85-5001
product price:  $165.99
/ea
Link 7/16" HSS Se .468 X .500 Drill .687 Cbore 5/8 Shank 2-1/2 Oal 50-L2-187
Link

7/16" HSS Se .468 X .500 Drill .687 Cbore 5/8 Shank 2-1/2 Oal

Zoro # G7642689
Mfr # 50-L2-187
product price:  $35.65
/ea
Internal Tool A Nc-625-625 N/C Counterbore 85-6251
Internal Tool

A Nc-625-625 N/C Counterbore

Zoro # G500402530
Mfr # 85-6251
product price:  $333.99
/ea
Internal Tool A Nc-703-750 N/C Counterbore 85-7031
Internal Tool

A Nc-703-750 N/C Counterbore

Zoro # G900402499
Mfr # 85-7031
product price:  $465.99
/ea
Kodiak Cutting Tools 1/4 Counterbore 1/32 Oversize Capscrew Style 5496018
Kodiak Cutting Tools

1/4 Counterbore 1/32 Oversize Capscrew Style

Zoro # G8636269
Mfr # 5496018
product price:  $49.35
/ea
Link 1/4" 3Xd HSS Se .280 X .840 Drill .406 Cbore 3/8 Shank 2-3/4 Oal 50-L2-384
Link

1/4" 3Xd HSS Se .280 X .840 Drill .406 Cbore 3/8 Shank 2-3/4 Oal

Zoro # G7636084
Mfr # 50-L2-384
product price:  $40.25
/ea
Super Tool Reduced Shank Counterbore, 21/32" D 52221
Super Tool

Reduced Shank Counterbore, 21/32" D

Zoro # G0331173
Mfr # 52221
product price:  $117.99
/ea
Kodiak Cutting Tools 1/2 Counterbore 1/32 Oversize Capscrew Style 5496062
Kodiak Cutting Tools

1/2 Counterbore 1/32 Oversize Capscrew Style

Zoro # G8644748
Mfr # 5496062
product price:  $95.79
/ea
Link 3MM Co 3Fl 3.8 Pilot X 6.3 Cbore 6.35 Shank X 100 Oal 75-CO-520
Link

3MM Co 3Fl 3.8 Pilot X 6.3 Cbore 6.35 Shank X 100 Oal

Zoro # G7644956
Mfr # 75-CO-520
product price:  $62.49
/ea
Keen Sleeve Height & Counterbore Gage KE278657
Keen

Sleeve Height & Counterbore Gage

Zoro # G909923957
Mfr # KE278657
product price:  $328.99
/ea
Tungaloy Solid End Mill Head, VGC080L08.0R20-, PK2 6859504
Tungaloy

Solid End Mill Head, VGC080L08.0R20-, PK2

Zoro # G401779045
Mfr # 6859504
product price:  $139.99
/pk 2, $70.00/ea
Qualtech Counterbore, Morse Taper Shank, Series DEWCBR, 234 Bore, 978 Overall Length, 5 Shank Diamete DEWCBRTS2-3/4
Qualtech

Counterbore, Morse Taper Shank, Series DEWCBR, 234 Bore, 978 Overall Length, 5 Shank Diamete

Zoro # G208029152
Mfr # DEWCBRTS2-3/4
product price:  $507.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 26-30, 10.2 mm 156620 8X10,2
Garant

Interchangeable Pilot Pin for Counterbore 156520 26-30, 10.2 mm

Zoro # G614389697
Mfr # 156620 8X10,2
product price:  $38.19
/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
Super Tool Reduced Shank Counterbore, 1-1/4" D 52240
Super Tool

Reduced Shank Counterbore, 1-1/4" D

Zoro # G0331532
Mfr # 52240
product price:  $227.62
/ea
Super Tool Reduced Shank Counterbore, 15/16" D 52230
Super Tool

Reduced Shank Counterbore, 15/16" D

Zoro # G0331237
Mfr # 52230
product price:  $111.99
/ea
Internal Tool A Nc-547-562 N/C Counterbore 85-5471
Internal Tool

A Nc-547-562 N/C Counterbore

Zoro # G000402504
Mfr # 85-5471
product price:  $232.99
/ea
Super Tool Reduced Shank Counterbore, 5/8" D 52220
Super Tool

Reduced Shank Counterbore, 5/8" D

Zoro # G0331130
Mfr # 52220
product price:  $108.99
/ea
Link No 8 Co 3Fl 0.195 Pilot X 0.304 Cbore 1/4" Shank X 4" Oal 50-CO-182
Link

No 8 Co 3Fl 0.195 Pilot X 0.304 Cbore 1/4" Shank X 4" Oal

Zoro # G7639959
Mfr # 50-CO-182
product price:  $64.95
/ea
Kodiak Cutting Tools No. 1 Counterbores On Size Capscrew Style 5495798
Kodiak Cutting Tools

No. 1 Counterbores On Size Capscrew Style

Zoro # G8614797
Mfr # 5495798
product price:  $268.99
/ea
Hhip 3/8 X 1/2" Shank High Speed Steel 2 Flute Solid  Cap Screw Counterbore 2007-0107
Hhip

3/8 X 1/2" Shank High Speed Steel 2 Flute Solid Cap Screw Counterbore

Zoro # G2468218
Mfr # 2007-0107
product price:  $24.89
/ea
Link #6 3Xd HSS Se .150 X .450 Drill .242 Cbore 1/4 Shank 2 Oal 50-L2-381
Link

#6 3Xd HSS Se .150 X .450 Drill .242 Cbore 1/4 Shank 2 Oal

Zoro # G7644877
Mfr # 50-L2-381
product price:  $32.55
/ea
Kodiak Cutting Tools No. 5 Counterbores 1/64 Oversize Capscrew Style 5495820
Kodiak Cutting Tools

No. 5 Counterbores 1/64 Oversize Capscrew Style

Zoro # G8614849
Mfr # 5495820
product price:  $38.99
/ea
Internal Tool A Nc-437-437 N/C Counterbore 85-4371
Internal Tool

A Nc-437-437 N/C Counterbore

Zoro # G900402451
Mfr # 85-4371
product price:  $127.99
/ea
Link 12MM Co 3Fl 12.8 Pilot X 18.8 Cbore 9.53 Shank X 125 Oal 75-CO-526
Link

12MM Co 3Fl 12.8 Pilot X 18.8 Cbore 9.53 Shank X 125 Oal

Zoro # G7641264
Mfr # 75-CO-526
product price:  $108.99
/ea
Super Tool Counterbore, 1/2" D, Carbide Tipped 59805
Super Tool

Counterbore, 1/2" D, Carbide Tipped

Zoro # G0329977
Mfr # 59805
product price:  $112.99
/ea
Kodiak Cutting Tools No. 6 Counterbores 1/64 Oversize Capscrew Style 5495831
Kodiak Cutting Tools

No. 6 Counterbores 1/64 Oversize Capscrew Style

Zoro # G8614824
Mfr # 5495831
product price:  $43.69
/ea
Hhip 5/16 X 7/16" High Speed Steel 2 Flute Solid  Cap Screw Counterbore 2007-0106
Hhip

5/16 X 7/16" High Speed Steel 2 Flute Solid Cap Screw Counterbore

Zoro # G2467895
Mfr # 2007-0106
product price:  $17.99
/ea
Link 5MM HSS Se 5.55 X 7.94 Drill 9.13 Cbore 7.94 Shank 38.1 Oal 75-L2-522
Link

5MM HSS Se 5.55 X 7.94 Drill 9.13 Cbore 7.94 Shank 38.1 Oal

Zoro # G7644974
Mfr # 75-L2-522
product price:  $23.25
/ea
Qualtech Counterbore, Round Shank, Series DEWCBR, 278 Bore, 978 Overall Length, 134 Shank Diameter,  DEWCBR2-7/8
Qualtech

Counterbore, Round Shank, Series DEWCBR, 278 Bore, 978 Overall Length, 134 Shank Diameter,

Zoro # G108029122
Mfr # DEWCBR2-7/8
product price:  $512.99
/ea
Link 10MM Co 3Fl 10.8 Pilot X 16.8 Cbore 9.53 Shank X 125 Oal 75-CO-525
Link

10MM Co 3Fl 10.8 Pilot X 16.8 Cbore 9.53 Shank X 125 Oal

Zoro # G7642506
Mfr # 75-CO-525
product price:  $109.99
/ea
Kodiak Cutting Tools 7/8 Counterbore On Size Capscrew Style 5495787
Kodiak Cutting Tools

7/8 Counterbore On Size Capscrew Style

Zoro # G8617965
Mfr # 5495787
product price:  $190.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 18-20, 6.8 mm 156620 5X6,8
Garant

Interchangeable Pilot Pin for Counterbore 156520 18-20, 6.8 mm

Zoro # G814389701
Mfr # 156620 5X6,8
product price:  $31.79
/ea
Super Tool Counterbore, 25/32" D, Carbide Tipped 5797812
Super Tool

Counterbore, 25/32" D, Carbide Tipped

Zoro # G0330263
Mfr # 5797812
product price:  $125.99
/ea
Hhip M4 X 4.5mm HSS 3 Flute Straight Shank Solid Pilot Counterbore 2007-0055
Hhip

M4 X 4.5mm HSS 3 Flute Straight Shank Solid Pilot Counterbore

Zoro # G2468105
Mfr # 2007-0055
product price:  $14.39
/ea
Link 1/4" HSS Se .280 X .375 Drill .406 Cbore 7/16 Shank 1-3/4 Oal 50-L2-184
Link

1/4" HSS Se .280 X .375 Drill .406 Cbore 7/16 Shank 1-3/4 Oal

Zoro # G7636039
Mfr # 50-L2-184
product price:  $25.49
/ea
Porting Tools & Counterbores (993 items) - Page 16
  • First
  • Previous
  • 16
    of 28 pages
  • Next
  • Last
How was your search?

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

Drill BitsTapsHole Saws & CuttersEnd MillsWrenches
Precision Measuring ToolsMeasuring and Layout ToolsKnives, Cutters & SnipsSockets & RatchetsPower Saw Blades
counter bore pilotmetric counterbore set5/8 counterborepilot counterboreinterchangeable pilot counterbore
high speed steelscientific cutting toolsmetric shcs1-1/4 in counterboremetric counterbore

Sign up and save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every part plays a part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Deals
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research
  • Tax Exemption

Zoro, Inc

Connect

Customer service from real people

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc