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  1. Home
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  3. Tools & Machining
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  5. Cutting Tools
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  7. Porting Tools & Counterbores
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  9. Counterbores

Counterbores (927 items) - Page 6

Garant Mini Counterbore for Through Holes, 180 Deg, Uncoated, 2.8X1.5 mm 155700 2,8X1,5
Garant

Mini Counterbore for Through Holes, 180 Deg, Uncoated, 2.8X1.5 mm

Zoro # G514389629
Mfr # 155700 2,8X1,5
product price: 
$30.99
/ea
Harvey Tool 0.4220'', 27/64 Cutter DIA x 1.0000'', 1 Flute Length - 4 FL - AlTiN Coated 23427-C3
Harvey Tool

0.4220'', 27/64 Cutter DIA x 1.0000'', 1 Flute Length - 4 FL - AlTiN Coated

Zoro # G413081587
Mfr # 23427-C3
product price: 
$138.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2362" 2556M
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2362"

Zoro # G7164799
Mfr # 2556M
product price: 
$106.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 10X5.3 mm 156020 10X5,3
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 10X5.3 mm

Zoro # G614389642
Mfr # 156020 10X5,3
product price: 
$21.49
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 8X4.5 mm 156020 8X4,5
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 8X4.5 mm

Zoro # G114389470
Mfr # 156020 8X4,5
product price: 
$19.79
/ea
Garant Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 10X4.2 mm 156220 10X4,2
Garant

Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 10X4.2 mm

Zoro # G514375578
Mfr # 156220 10X4,2
product price: 
$22.75
/ea
Drill America No 5 .141 Continuous Pilot Capscrew Counterbore DEWCSCBR5
Drill America

No 5 .141 Continuous Pilot Capscrew Counterbore

Zoro # G1739640
Mfr # DEWCSCBR5
product price: 
$25.15
/ea
Garant Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 6.5X2.9 mm 156220 6,5X2,9
Garant

Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 6.5X2.9 mm

Zoro # G814376060
Mfr # 156220 6,5X2,9
product price: 
$25.99
/ea
Link 12MM HSS Se 12.70 X 15.87 Drill 18.75 Cbore 15.87 Shank 61.91 Oal 75-L2-526
Link

12MM HSS Se 12.70 X 15.87 Drill 18.75 Cbore 15.87 Shank 61.91 Oal

Zoro # G7636224
Mfr # 75-L2-526
product price: 
$48.75
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 24, 12 mm 156620 6X12
Garant

Interchangeable Pilot Pin for Counterbore 156520 24, 12 mm

Zoro # G414389705
Mfr # 156620 6X12
product price: 
$36.45
/ea
Harvey Tool Counterbores-Flat Bottom, 676716, Uncoated, 1/4" Cutter Diameter, 1-5/16" Flute Length 676716
Harvey Tool

Counterbores-Flat Bottom, 676716, Uncoated, 1/4" Cutter Diameter, 1-5/16" Flute Length

Zoro # G722920553
Mfr # 676716
product price: 
$68.65
/ea
Internal Tool A Nc-421-437 N/C Counterbore 85-4211
Internal Tool

A Nc-421-437 N/C Counterbore

Zoro # G600402362
Mfr # 85-4211
product price: 
$132.99
/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
Super Tool Reduced Shank Counterbore, 1-3/16" D 52238
Super Tool

Reduced Shank Counterbore, 1-3/16" D

Zoro # G0331499
Mfr # 52238
product price: 
$202.99
/ea
Link #5 3Xd HSS Se .138 X .414 Drill .220 Cbore 1/4 Shank 2 Oal 50-L2-380
Link

#5 3Xd HSS Se .138 X .414 Drill .220 Cbore 1/4 Shank 2 Oal

Zoro # G7644840
Mfr # 50-L2-380
product price: 
$30.55
/ea
Super Tool Counterbore, 2" D, Carbide Tipped 56428
Super Tool

Counterbore, 2" D, Carbide Tipped

Zoro # G0330248
Mfr # 56428
product price: 
$414.99
/ea
Kodiak Cutting Tools No. 3/4 Counterbores On Size Capscrew Style 5495776
Kodiak Cutting Tools

No. 3/4 Counterbores On Size Capscrew Style

Zoro # G8619855
Mfr # 5495776
product price: 
$183.99
/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: 
$404.99
/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
Harvey Tool Counterbores-Flat Bottom, 676708, Uncoated, 1/8" Cutter Diameter, 3/4" Flute Length 676708
Harvey Tool

Counterbores-Flat Bottom, 676708, Uncoated, 1/8" Cutter Diameter, 3/4" Flute Length

Zoro # G922920612
Mfr # 676708
product price: 
$50.79
/ea
Link 3MM HSS Se 3.57 X 6.35 Drill 5.95 Cbore 6.35 Shank 31.75 Oal 75-L2-520
Link

3MM HSS Se 3.57 X 6.35 Drill 5.95 Cbore 6.35 Shank 31.75 Oal

Zoro # G7636136
Mfr # 75-L2-520
product price: 
$21.75
/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: 
$57.99
/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
Tungaloy Solid End Mill Head, VGC157L15.0R03-, PK2 6859506
Tungaloy

Solid End Mill Head, VGC157L15.0R03-, PK2

Zoro # G601779043
Mfr # 6859506
product price: 
$108.99
/pk 2, $54.50/ea
Internal Tool A Nc-578-625 N/C Counterbore 85-5781
Internal Tool

A Nc-578-625 N/C Counterbore

Zoro # G200402502
Mfr # 85-5781
product price: 
$331.99
/ea
Link 5/8" Co 3Fl 0.655 Pilot X 0.978 Cbore 5/8" Shank X 6" Oal 50-CO-189
Link

5/8" Co 3Fl 0.655 Pilot X 0.978 Cbore 5/8" Shank X 6" Oal

Zoro # G7642698
Mfr # 50-CO-189
product price: 
$183.99
/ea
Super Tool Reduced Shank Counterbore, 1-5/8" D 52252
Super Tool

Reduced Shank Counterbore, 1-5/8" D

Zoro # G0331383
Mfr # 52252
product price: 
$280.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 26-30, 12 mm 156620 8X12
Garant

Interchangeable Pilot Pin for Counterbore 156520 26-30, 12 mm

Zoro # G914389564
Mfr # 156620 8X12
product price: 
$38.19
/ea
Internal Tool A Nc-390-437 N/C Counterbore 85-3901
Internal Tool

A Nc-390-437 N/C Counterbore

Zoro # G100402466
Mfr # 85-3901
product price: 
$127.99
/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 Ua7-14MM Metric Shcs HSS Counterbore 72-L2-517
Link

Ua7-14MM Metric Shcs HSS Counterbore

Zoro # G7646898
Mfr # 72-L2-517
product price: 
$49.75
/ea
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: 
$80.79
/ea
Super Tool Counterbore, 29/32" D, Carbide Tipped 5799062
Super Tool

Counterbore, 29/32" D, Carbide Tipped

Zoro # G0330239
Mfr # 5799062
product price: 
$170.99
/ea
Harvey Tool Counterbores-Flat Bottom, 676716-C3, AlTiN, 1/4" Cutter Diameter, 1-5/16" Flute Length 676716-C3
Harvey Tool

Counterbores-Flat Bottom, 676716-C3, AlTiN, 1/4" Cutter Diameter, 1-5/16" Flute Length

Zoro # G522920609
Mfr # 676716-C3
product price: 
$80.35
/ea
Kodiak Cutting Tools 1/4 Counterbore On Size Capscrew Style 5495710
Kodiak Cutting Tools

1/4 Counterbore On Size Capscrew Style

Zoro # G8645974
Mfr # 5495710
product price: 
$49.35
/ea
Super Tool Reduced Shank Counterbore, 27/32" D 52227
Super Tool

Reduced Shank Counterbore, 27/32" D

Zoro # G0331480
Mfr # 52227
product price: 
$133.99
/ea
Counterbores (927 items) - Page 6
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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

Hole SawsJobber Length Drill BitsReduced Shank Drill BitsCountersinksTap Sets
Square End MillsAuger Drill BitsDrill Bit SetsCenter DrillsHammer Drill Bits
cleveland counterborecounter bore pilot5/8 counterborepilot counterboreinterchangeable pilot counterbore
high speed steelmetric shcs1-1/4 in counterbore6-piece damask jacquard/solidcounter bore set

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