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 24

Morse Cap Screw Counterbore, Straight Shank, Series 1766, 10 mm Screw, 06496 Bore Dia, 7 Overall Lengt 25751
Morse

Cap Screw Counterbore, Straight Shank, Series 1766, 10 mm Screw, 06496 Bore Dia, 7 Overall Lengt

Zoro # G208029138
Mfr # 25751
product price:  $107.99
/ea
Internal Tool A Nc-281-312 N/C Counterbore 85-2811
Internal Tool

A Nc-281-312 N/C Counterbore

Zoro # G600402386
Mfr # 85-2811
product price:  $81.09
/ea
No Product Image Available
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G621726478
Mfr # 902-000-292
product price:  $595.99
/ea
Super Tool Counterbore, 1-13/16" D, Carbide Tipped 56425
Super Tool

Counterbore, 1-13/16" D, Carbide Tipped

Zoro # G0329922
Mfr # 56425
product price:  $396.99
/ea
Tungaloy Solid End Mill Head, VGC120L10.0R04-, PK2 6859334
Tungaloy

Solid End Mill Head, VGC120L10.0R04-, PK2

Zoro # G401779090
Mfr # 6859334
product price:  $154.99
/pk 2, $77.50/ea
Super Tool Counterbore, 23/32" D, Carbide Tipped 5797188
Super Tool

Counterbore, 23/32" D, Carbide Tipped

Zoro # G0330071
Mfr # 5797188
product price:  $119.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 80 mm

Zoro # G321725443
Mfr # 902-000-231
product price:  $66.99
/ea
Link Ua3-3MM Metric Shcs HSS Counterbore 72-L2-510
Link

Ua3-3MM Metric Shcs HSS Counterbore

Zoro # G7636075
Mfr # 72-L2-510
product price:  $23.49
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G921726024
Mfr # 902-000-299
product price:  $281.99
/ea
Internal Tool A Nc-594-625 N/C Counterbore 85-5941
Internal Tool

A Nc-594-625 N/C Counterbore

Zoro # G900402505
Mfr # 85-5941
product price:  $317.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G221725246
Mfr # 902-000-252
product price:  $90.89
/ea
Super Tool Counterbore, 17/32" D, Carbide Tipped 5795312
Super Tool

Counterbore, 17/32" D, Carbide Tipped

Zoro # G0330169
Mfr # 5795312
product price:  $135.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 80 mm

Zoro # G421726678
Mfr # 902-000-240
product price:  $69.29
/ea
Super Tool Counterbore, 19/32" D, Carbide Tipped 5775938
Super Tool

Counterbore, 19/32" D, Carbide Tipped

Zoro # G0330360
Mfr # 5775938
product price:  $130.99
/ea
Qualtech Counterbore, Morse Taper Shank, Series DEWCBR, 238 Bore, 978 Overall Length, 5 Shank Diamete DEWCBRTS2-3/8
Qualtech

Counterbore, Morse Taper Shank, Series DEWCBR, 238 Bore, 978 Overall Length, 5 Shank Diamete

Zoro # G708029089
Mfr # DEWCBRTS2-3/8
product price:  $376.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G821726780
Mfr # 902-000-210
product price:  $54.49
/ea
Internal Tool A Nc-234-250 N/C Counterbore 85-2341
Internal Tool

A Nc-234-250 N/C Counterbore

Zoro # G100402404
Mfr # 85-2341
product price:  $56.75
/ea
Link 6MM Co 3Fl 6.8 Pilot X 10.8 Cbore 7.94 Shank X 100 Oal 75-CO-523
Link

6MM Co 3Fl 6.8 Pilot X 10.8 Cbore 7.94 Shank X 100 Oal

Zoro # G7639934
Mfr # 75-CO-523
product price:  $81.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G321727607
Mfr # 902-000-310
product price:  $100.99
/ea
Link 7/16" 3Xd HSS Se .468 X 1.404 Drill .688 Cbore 1/2 Shank 4 Oal 50-L2-387
Link

7/16" 3Xd HSS Se .468 X 1.404 Drill .688 Cbore 1/2 Shank 4 Oal

Zoro # G7638778
Mfr # 50-L2-387
product price:  $81.49
/ea
Link 14MM HSS Se 14.68 X 16.67 Drill 21.82 Cbore 15.87 Shank 66.67 Oal 75-L2-527
Link

14MM HSS Se 14.68 X 16.67 Drill 21.82 Cbore 15.87 Shank 66.67 Oal

Zoro # G7637335
Mfr # 75-L2-527
product price:  $46.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G321724835
Mfr # 902-000-222
product price:  $59.19
/ea
No Product Image Available
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G021724876
Mfr # 902-000-294
product price:  $595.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G321725061
Mfr # 902-000-320
product price:  $68.89
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G321727546
Mfr # 902-000-081
product price:  $52.89
/ea
Super Tool Counterbore, 5/16" D, Carbide Tipped 56402
Super Tool

Counterbore, 5/16" D, Carbide Tipped

Zoro # G0330412
Mfr # 56402
product price:  $82.29
/ea
Super Tool Counterbore, 23/32" D, Carbide Tipped 5777188
Super Tool

Counterbore, 23/32" D, Carbide Tipped

Zoro # G0330211
Mfr # 5777188
product price:  $153.99
/ea
Link Ua4 #10 English Shcs HSS Counterbore 60-L2-296
Link

Ua4 #10 English Shcs HSS Counterbore

Zoro # G7643784
Mfr # 60-L2-296
product price:  $24.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G521726745
Mfr # 902-000-132
product price:  $70.59
/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
Super Tool Counterbore, 1" D, Carbide Tipped 56413
Super Tool

Counterbore, 1" D, Carbide Tipped

Zoro # G0329870
Mfr # 56413
product price:  $127.99
/ea
Link 8MM Co 3Fl 8.8 Pilot X 13.8 Cbore 7.94 Shank X 100 Oal 75-CO-524
Link

8MM Co 3Fl 8.8 Pilot X 13.8 Cbore 7.94 Shank X 100 Oal

Zoro # G7641246
Mfr # 75-CO-524
product price:  $85.45
/ea
Internal Tool A Nc-719-750 N/C Counterbore 85-7191
Internal Tool

A Nc-719-750 N/C Counterbore

Zoro # G800402599
Mfr # 85-7191
product price:  $424.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G021726719
Mfr # 902-000-312
product price:  $100.99
/ea
Link 4MM Co 3Fl 4.8 Pilot X 7.8 Cbore 6.35 Shank X 100 Oal 75-CO-521
Link

4MM Co 3Fl 4.8 Pilot X 7.8 Cbore 6.35 Shank X 100 Oal

Zoro # G7638839
Mfr # 75-CO-521
product price:  $66.95
/ea
Link 1/4" Co 3Fl 0.281 Pilot X 0.414 Cbore 5/16" Shank X 4" Oal 50-CO-184
Link

1/4" Co 3Fl 0.281 Pilot X 0.414 Cbore 5/16" Shank X 4" Oal

Zoro # G7637317
Mfr # 50-CO-184
product price:  $78.85
/ea
Porting Tools & Counterbores (995 items) - Page 24
  • First
  • Previous
  • 24
    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 BitsTapsCountersinks, Center Drills & Spotting DrillsDiesWrenches
Precision Measuring ToolsScrewdrivers and NutdriversPower Saw BladesSockets & RatchetsMeasuring and Layout Tools
metric counterbore setpilot counterborescientific cutting tools5/8 counterboremetric counterbore
1-1/4 in counterborecounter bore setcounterbores - flat bottomcounter bore pilotinterchangeable pilot 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