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
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 9

Garant Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 20X10.2 mm 156220 20X10,2
Garant

Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 20X10.2 mm

Zoro # G114376036
Mfr # 156220 20X10,2
product price: 
$52.59
/ea
Keo Counterbore, Metric, 100 mm 902-000-261
Keo

Counterbore, Metric, 100 mm

Zoro # G121726640
Mfr # 902-000-261
product price: 
$112.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64) 25517-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64)

Zoro # G7166436
Mfr # 25517-C3
product price: 
$137.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3281" (21/64) 23421
Harvey Tool

Counterbores - Flat Bottom, 0.3281" (21/64)

Zoro # G7148604
Mfr # 23421
product price: 
$94.39
/ea
Keo Counterbore, Decimal Inch, 3 in 902-000-332
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G221725291
Mfr # 902-000-332
product price: 
$58.15
/ea
Keo Counterbore, 1/64 Clearance, Size No 10, Co 902-000-014
Keo

Counterbore, 1/64 Clearance, Size No 10, Co

Zoro # G1024082
Mfr # 902-000-014
product price: 
$75.19
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0787" 2542M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0787"

Zoro # G7253960
Mfr # 2542M-C3
product price: 
$69.95
/ea
Harvey Tool Counterbores - Flat Bottom, 0.4724" 23476
Harvey Tool

Counterbores - Flat Bottom, 0.4724"

Zoro # G7242989
Mfr # 23476
product price: 
$150.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1719" (11/64) 25511-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1719" (11/64)

Zoro # G7242885
Mfr # 25511-C3
product price: 
$85.79
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 15X9 mm 156020 15X9
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 15X9 mm

Zoro # G314389669
Mfr # 156020 15X9
product price: 
$35.49
/ea
Keo Counterbore, Metric, 80 mm 902-000-228
Keo

Counterbore, Metric, 80 mm

Zoro # G721725272
Mfr # 902-000-228
product price: 
$69.29
/ea
Keo Counterbore, Decimal Inch, 5 in 902-000-311
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G221726717
Mfr # 902-000-311
product price: 
$110.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2187" (7/32) 23414-C3
Harvey Tool

Counterbores - Flat Bottom, 0.2187" (7/32)

Zoro # G7259204
Mfr # 23414-C3
product price: 
$79.39
/ea
Keo Counterbore, Metric, 71 mm 902-000-213
Keo

Counterbore, Metric, 71 mm

Zoro # G921725638
Mfr # 902-000-213
product price: 
$59.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1968" 2555M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1968"

Zoro # G7164878
Mfr # 2555M-C3
product price: 
$121.99
/ea
Keo Counterbore, Metric, 71 mm 902-000-216
Keo

Counterbore, Metric, 71 mm

Zoro # G521727421
Mfr # 902-000-216
product price: 
$64.39
/ea
Keo Counterbore, Decimal Inch, 6 in 902-000-165
Keo

Counterbore, Decimal Inch, 6 in

Zoro # G321726266
Mfr # 902-000-165
product price: 
$177.99
/ea
Keo Counterbore, Decimal Inch, 3 in 902-000-093
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G321726655
Mfr # 902-000-093
product price: 
$61.89
/ea
Keo Counterbore, Decimal Inch, 6 in 902-000-302
Keo

Counterbore, Decimal Inch, 6 in

Zoro # G321727744
Mfr # 902-000-302
product price: 
$202.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0787" 2332M
Harvey Tool

Counterbores - Flat Bottom, 0.0787"

Zoro # G7153687
Mfr # 2332M
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1094" (7/64), Shank Dia.: 1/8" 23407
Harvey Tool

Counterbores - Flat Bottom, 0.1094" (7/64), Shank Dia.: 1/8"

Zoro # G7154615
Mfr # 23407
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0625" (1/16), Shank Dia.: 1/8" 25462
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0625" (1/16), Shank Dia.: 1/8"

Zoro # G7253997
Mfr # 25462
product price: 
$61.69
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0937" (3/32) 23393
Harvey Tool

Counterbores - Flat Bottom, 0.0937" (3/32)

Zoro # G7149198
Mfr # 23393
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0550" 23355-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0550"

Zoro # G7255659
Mfr # 23355-C3
product price: 
$57.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.4 mm 156020 6,5X3,4
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.4 mm

Zoro # G214389462
Mfr # 156020 6,5X3,4
product price: 
$25.55
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3281" (21/64), Flute Length: 1" 23421-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3281" (21/64), Flute Length: 1"

Zoro # G7151736
Mfr # 23421-C3
product price: 
$116.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1406" (9/64) 23409-C3
Harvey Tool

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

Zoro # G7258985
Mfr # 23409-C3
product price: 
$56.49
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0394" 2541M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0394"

Zoro # G7161037
Mfr # 2541M-C3
product price: 
$71.89
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3150", Finish - Machining: AlTiN 2348M-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3150", Finish - Machining: AlTiN

Zoro # G7260674
Mfr # 2348M-C3
product price: 
$116.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2812" (9/32) 25518-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2812" (9/32)

Zoro # G7161956
Mfr # 25518-C3
product price: 
$142.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0394" 2331M-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0394"

Zoro # G7148586
Mfr # 2331M-C3
product price: 
$60.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0900", Finish - Machining: AlTiN 23390-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0900", Finish - Machining: AlTiN

Zoro # G7154439
Mfr # 23390-C3
product price: 
$57.79
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0469" (3/64) 23347
Harvey Tool

Counterbores - Flat Bottom, 0.0469" (3/64)

Zoro # G7151474
Mfr # 23347
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0625" (1/16) 23362-C6
Harvey Tool

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

Zoro # G7154527
Mfr # 23362-C6
product price: 
$61.39
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1562" (5/32) 25510-C3
Harvey Tool

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

Zoro # G7255415
Mfr # 25510-C3
product price: 
$85.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0312" (1/32) 23331-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0312" (1/32)

Zoro # G7153985
Mfr # 23331-C3
product price: 
$60.15
/ea
Porting Tools & Counterbores (993 items) - Page 9
  • First
  • Previous
  • 9
    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 & CuttersCountersinks, Center Drills & Spotting DrillsWrenches
Sockets & RatchetsMeasuring and Layout ToolsKnives, Cutters & SnipsScrewdrivers and NutdriversClamps
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