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
  • Promo Codes
  • Contact Us
Added to Cart
Skip to Main Content
FREE Shipping on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
Cart Icon
0
Cart Icon
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
Search Feedback

Porting Tools & Counterbores (995 items) - Page 9

Harvey Tool Counterbores - Flat Bottom, 0.4687" (15/32) 23430-C3
Harvey Tool

Counterbores - Flat Bottom, 0.4687" (15/32)

Zoro # G7159208
Mfr # 23430-C3
product price:  $141.99
/ea
Keo Counterbore, 1/32 Clearance, Size No 5, Co 902-000-006
Keo

Counterbore, 1/32 Clearance, Size No 5, Co

Zoro # G0495774
Mfr # 902-000-006
product price:  $55.09
/ea
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:  $114.99
/ea
Cleveland Counterbore, 1.687" L, 0.156" dia., Bright C46571
Cleveland

Counterbore, 1.687" L, 0.156" dia., Bright

Zoro # G4760469
Mfr # C46571
product price:  $27.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16) 25528-C3
Harvey Tool

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

Zoro # G7265504
Mfr # 25528-C3
product price:  $164.99
/ea
Drill America No 6 .137mm Machine Screw Solid Counterbore DEWCBRSOL6
Drill America

No 6 .137mm Machine Screw Solid Counterbore

Zoro # G1741357
Mfr # DEWCBRSOL6
product price:  $15.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0937" (3/32) 25493
Harvey Tool

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

Zoro # G7254024
Mfr # 25493
product price:  $50.39
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0394" 2331M
Harvey Tool

Counterbores - Flat Bottom, 0.0394"

Zoro # G7254870
Mfr # 2331M
product price:  $40.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.7500" (3/4) 23448
Harvey Tool

Counterbores - Flat Bottom, 0.7500" (3/4)

Zoro # G7245466
Mfr # 23448
product price:  $276.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 18X10.5 mm 156020 18X10,5
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 18X10.5 mm

Zoro # G414389545
Mfr # 156020 18X10,5
product price:  $44.15
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0394" 2541M
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0394"

Zoro # G7161807
Mfr # 2541M
product price:  $48.99
/ea
Keo Counterbore, 1/32 Clearance, Size 3/4, Co 902-000-035
Keo

Counterbore, 1/32 Clearance, Size 3/4, Co

Zoro # G3346673
Mfr # 902-000-035
product price:  $236.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 20X13 mm 156020 20X13
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 20X13 mm

Zoro # G914389526
Mfr # 156020 20X13
product price:  $47.19
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1719" (11/64) 23411-C3
Harvey Tool

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

Zoro # G7152515
Mfr # 23411-C3
product price:  $42.45
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3937" 2550M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3937"

Zoro # G7247338
Mfr # 2550M-C3
product price:  $161.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3150" 2348M
Harvey Tool

Counterbores - Flat Bottom, 0.3150"

Zoro # G7257314
Mfr # 2348M
product price:  $82.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2362" 2346M-C3
Harvey Tool

Counterbores - Flat Bottom, 0.2362"

Zoro # G7259037
Mfr # 2346M-C3
product price:  $63.85
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2362" 2346M
Harvey Tool

Counterbores - Flat Bottom, 0.2362"

Zoro # G7252518
Mfr # 2346M
product price:  $54.25
/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:  $48.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1875" (3/16), Number of Flutes: 4 25512
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1875" (3/16), Number of Flutes: 4

Zoro # G7260945
Mfr # 25512
product price:  $61.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2969" (19/64) 23419-C3
Harvey Tool

Counterbores - Flat Bottom, 0.2969" (19/64)

Zoro # G7151395
Mfr # 23419-C3
product price:  $78.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.4724" 23476-C3
Harvey Tool

Counterbores - Flat Bottom, 0.4724"

Zoro # G7253988
Mfr # 23476-C3
product price:  $138.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3937" 2340M-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3937"

Zoro # G7150975
Mfr # 2340M-C3
product price:  $110.99
/ea
Cleveland Counterbore, 2.218" L, 0.313" dia., Bright C46630
Cleveland

Counterbore, 2.218" L, 0.313" dia., Bright

Zoro # G4799903
Mfr # C46630
product price:  $46.85
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2969" (19/64) 25519-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2969" (19/64)

Zoro # G7167109
Mfr # 25519-C3
product price:  $118.99
/ea
Cleveland Counterbore, 1.875" L, 0.250" dia., Bright C46599
Cleveland

Counterbore, 1.875" L, 0.250" dia., Bright

Zoro # G4762121
Mfr # C46599
product price:  $34.35
/ea
Cleveland Pilot for Counterbores, 3/32 in, 5/32 in C46533
Cleveland

Pilot for Counterbores, 3/32 in, 5/32 in

Zoro # G4784783
Mfr # C46533
product price:  $25.89
/ea
Keo Counterbore, 1/32 Clearance, Size 7/16, Co 902-000-027
Keo

Counterbore, 1/32 Clearance, Size 7/16, Co

Zoro # G3237306
Mfr # 902-000-027
product price:  $93.29
/ea
Cleveland Counterbore, 1.625" L, 0.188" dia., Bright C46566
Cleveland

Counterbore, 1.625" L, 0.188" dia., Bright

Zoro # G4775613
Mfr # C46566
product price:  $27.29
/ea
Cleveland Counterbore, 1.437" L, 0.125" dia., Bright C46553
Cleveland

Counterbore, 1.437" L, 0.125" dia., Bright

Zoro # G4803500
Mfr # C46553
product price:  $26.15
/ea
Scientific Cutting Tools Port Tool, MS33649, Reamer, 1 3/16-12 UNJ MS33649-14R
Scientific Cutting Tools

Port Tool, MS33649, Reamer, 1 3/16-12 UNJ

Zoro # G7921663
Mfr # MS33649-14R
product price:  $292.49
/ea
Cleveland Counterbore, 1.937" L, 0.375" dia., Bright C46669
Cleveland

Counterbore, 1.937" L, 0.375" dia., Bright

Zoro # G4841492
Mfr # C46669
product price:  $53.59
/ea
Cleveland Counterbore, 1.625" L, 0.188" dia., Bright C46612
Cleveland

Counterbore, 1.625" L, 0.188" dia., Bright

Zoro # G4776620
Mfr # C46612
product price:  $30.99
/ea
Cleveland Counterbore, 1.500" L, 0.094" dia., Bright C46570
Cleveland

Counterbore, 1.500" L, 0.094" dia., Bright

Zoro # G4880132
Mfr # C46570
product price:  $27.29
/ea
Cleveland Counterbore, 1.625" L, 0.156" dia., Bright C46550
Cleveland

Counterbore, 1.625" L, 0.156" dia., Bright

Zoro # G4759732
Mfr # C46550
product price:  $26.15
/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:  $92.55
/ea
Porting Tools & Counterbores (995 items) - Page 9
  • First
  • Previous
  • 9
    of 28 pages
  • Next
  • Last

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 BitsTapsEnd MillsCountersinks, Center Drills & Spotting DrillsPrecision Measuring Tools
WrenchesSockets & RatchetsPower Saw BladesScrewdrivers and NutdriversMeasuring and Layout Tools
cobalt 1/2cleveland counterbore6-piece damask jacquard/solid1-1/4 in counterbore5/16 counterbore
5/16 cobalt50 chain link#50 master link5/8 counterbore1/4 counterbore

Sign Up & 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
  • Promo Codes
  • Sitemap
  • Track My Order

Services

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

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