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  1. Home
  2. /
  3. Tools & Machining
  4. /
  5. Cutting Tools
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  7. Porting Tools & Counterbores
  8. /
  9. Counterbores

Counterbores (929 items) - Page 24

Internal Tool A Nc-265-312 N/C Counterbore 85-2651
Internal Tool

A Nc-265-312 N/C Counterbore

Zoro # G000402450
Mfr # 85-2651
product price:  $79.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G521725250
Mfr # 902-000-183
product price:  $476.99
/ea
Link Ua6-10MM Metric Shcs HSS Counterbore 72-L2-515
Link

Ua6-10MM Metric Shcs HSS Counterbore

Zoro # G7643967
Mfr # 72-L2-515
product price:  $37.79
/ea
Super Tool 1 in. dia. Carbide Tipped Counterbore for Steel, Morse Taper Shank No. 3, 3 flutes 47421
Super Tool

1 in. dia. Carbide Tipped Counterbore for Steel, Morse Taper Shank No. 3, 3 flutes

Zoro # G810744221
Mfr # 47421
product price:  $174.99
/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
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
No Product Image Available
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G821726254
Mfr # 902-000-078
product price:  $51.69
/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-437-437 N/C Counterbore 85-4371
Internal Tool

A Nc-437-437 N/C Counterbore

Zoro # G900402451
Mfr # 85-4371
product price:  $124.99
/ea
Internal Tool A Nc-484-500 N/C Counterbore 85-4841
Internal Tool

A Nc-484-500 N/C Counterbore

Zoro # G200402397
Mfr # 85-4841
product price:  $166.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G221725246
Mfr # 902-000-252
product price:  $90.89
/ea
Super Tool Counterbore, 7/8" D, Carbide Tipped 56411
Super Tool

Counterbore, 7/8" D, Carbide Tipped

Zoro # G0330117
Mfr # 56411
product price:  $129.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G321726655
Mfr # 902-000-093
product price:  $56.89
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G921726406
Mfr # 902-000-313
product price:  $85.39
/ea
Link #8 HSS Se .178 X .281 Drill .290 Cbore 5/16 Shank 1-15/32 Oal 50-L2-182
Link

#8 HSS Se .178 X .281 Drill .290 Cbore 5/16 Shank 1-15/32 Oal

Zoro # G7636215
Mfr # 50-L2-182
product price:  $21.45
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G621726607
Mfr # 902-000-219
product price:  $57.29
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 33-40, 21 mm 156620 10X21
Garant

Interchangeable Pilot Pin for Counterbore 156520 33-40, 21 mm

Zoro # G414389811
Mfr # 156620 10X21
product price:  $45.65
/ea
Super Tool Counterbore, 21/32" D, Carbide Tipped 5776562
Super Tool

Counterbore, 21/32" D, Carbide Tipped

Zoro # G0330342
Mfr # 5776562
product price:  $122.99
/ea
Internal Tool A Nc-250-250 N/C Counterbore 85-2501
Internal Tool

A Nc-250-250 N/C Counterbore

Zoro # G600402430
Mfr # 85-2501
product price:  $56.79
/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
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G121726640
Mfr # 902-000-261
product price:  $102.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G321726624
Mfr # 902-000-120
product price:  $67.39
/ea
Super Tool Counterbore, 1-3/8" D, Carbide Tipped 56419
Super Tool

Counterbore, 1-3/8" D, Carbide Tipped

Zoro # G0329889
Mfr # 56419
product price:  $175.99
/ea
Internal Tool A Nc-125-125 N/C Counterbore 85-1251
Internal Tool

A Nc-125-125 N/C Counterbore

Zoro # G700402361
Mfr # 85-1251
product price:  $35.29
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G721725548
Mfr # 902-000-198
product price:  $49.39
/ea
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G621725938
Mfr # 902-000-243
product price:  $78.89
/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
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G421725374
Mfr # 902-000-258
product price:  $84.79
/ea
Super Tool Counterbore, 1-5/16" D, Carbide Tipped 56418
Super Tool

Counterbore, 1-5/16" D, Carbide Tipped

Zoro # G0329767
Mfr # 56418
product price:  $166.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 6 in

Zoro # G721726910
Mfr # 902-000-303
product price:  $185.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 18-20, 8.5 mm 156620 5X8,5
Garant

Interchangeable Pilot Pin for Counterbore 156520 18-20, 8.5 mm

Zoro # G614389543
Mfr # 156620 5X8,5
product price:  $31.79
/ea
Qualtech Counterbore, Round Shank, Series DEWCBR, 6364 Bore, 638 Overall Length, 34 Shank Diameter, 5 DEWCBR63/64
Qualtech

Counterbore, Round Shank, Series DEWCBR, 6364 Bore, 638 Overall Length, 34 Shank Diameter, 5

Zoro # G808029088
Mfr # DEWCBR63/64
product price:  $76.99
/ea
Kodiak Cutting Tools 1/4 Counterbore 1/64 Oversize Capscrew Style 5495864
Kodiak Cutting Tools

1/4 Counterbore 1/64 Oversize Capscrew Style

Zoro # G8614806
Mfr # 5495864
product price:  $53.95
/ea
Link #10 HSS Se .200 X .312 Drill .332 Cbore 5/16 Shank 1-1/2 Oal 50-L2-183
Link

#10 HSS Se .200 X .312 Drill .332 Cbore 5/16 Shank 1-1/2 Oal

Zoro # G7638875
Mfr # 50-L2-183
product price:  $20.35
/ea
Link Ua4 #8 English Shcs HSS Counterbore 60-L2-295
Link

Ua4 #8 English Shcs HSS Counterbore

Zoro # G7636066
Mfr # 60-L2-295
product price:  $23.25
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 18-20, 13 mm 156620 5X13
Garant

Interchangeable Pilot Pin for Counterbore 156520 18-20, 13 mm

Zoro # G914389717
Mfr # 156620 5X13
product price:  $31.79
/ea
Counterbores (929 items) - Page 24
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About Counterbores

Counterbores are specialized tools utilized in creating enlarged, flat-bottomed holes in various materials, primarily metal. They're essential when a fastener's head needs to be level with or beneath the surface of the worked material. Available in an array of sizes and shapes, these tools can accommodate diverse types of fasteners and feature different tip configurations like straight flute or spiral flute based on their intended use. Counterboring speeds differ according to the material being processed. These durable tools are typically crafted from high-speed steel (HSS) or cobalt steel for enhanced cutting performance, sometimes coated with titanium nitride (TiN) for superior wear resistance and lubricity when dealing with tougher materials such as stainless steel or aluminum. Industries ranging from automotive manufacturing and aerospace engineering to medical device production widely employ counterbores for precise hole creation necessary for mounting screws and other fasteners.

Related Categories

CountersinksReduced Shank Drill BitsHole SawsSquare End MillsJobber Length Drill Bits
Center DrillsSpiral Flute 3-Flute TapsCarbide End MillsAuger Drill BitsDrill Bit Sets
pilot counterborecleveland counterborecounterbores - flat bottom1-1/4 in counterbore5/8 counterbore
counter bore pilotinterchangeable pilot counterbore6-piece damask jacquard/solidhigh speed steelmetric shcs

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