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Best Counterbores - Buying Guide

Last Updated: 09/14/2019

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Bestselling Counterbores on Amazon

  1. 21 Pc. Counterbore Set 5/16" - 5/8" Interchangeable Pilots 3/8" Shank HSS
  2. Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank, 7 Pc, 508...
  3. Accusize Industrial Tools 39 Pc Hss Interchangeable Pilot Counterbore Set, Counterbores from 1/4'' u...
  4. Accusize Industrial Tools 7 Pc'' H.S.S. Solid Capscrew Counterbore Set 3 Flute Straight Shank, 509S-0007
  5. Accusize Industrial Tools 7 Pc Metric Hss Solid Capscrew Counterbore Set, 3 Flute, Straight Shank, 5...
  6. Alvord Polk 500 High-Speed Steel Counterbore, Built-In Pilot, Uncoated (Bright) Finish, 8-32 (On Siz...
  7. 1 1/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flu...
  8. Alvord Polk 401 High-Speed Steel Counterbore, Built-In Pilot, Uncoated (Bright) Finish, 3mm Size
  9. HHIP 2007-0010#10 x 13/64 HSS 3 Flute Solid Pilot Counterbore
  10. 7/16" Interchangeable Pilot Counterbore

  #1

21 Pc. Counterbore Set 5/16" - 5/8" Interchangeable Pilots 3/8" Shank HSS

 Ean: 0647829665043   |    PartNumber: ALL-10500   |   Asin: B01MXSP2MG

Supplied in fitted case.

Features

  • Our Part # ALL-10500
  • Set includes 6 counterbores: 5/16, 3/8, 7/16, 1/2, 9/16 & 3/4 diameters
  • Set includes 14 pilots: .1870, .2040, .2130, .2290, 1/4, 17/64, 9/32, 5/16, 21/64, 11/32, 3/8, 25/64, 13/32 & 7/16
  • Also includes (1) each: 3/8 shank & wrench (shank measures 3.5 overall) Made of high quality High Speed Steel (HSS)
  • See more on Amazon...

Brand: All Industrial   |   Manufacturer: TrongStar

Amazon Price: $80.69 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 1-2 business days
List Price: $80.69

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  #2

Accusize Industrial Tools H.S.S. Solid Cap Screw Counterbore Set, 3 Flute, Straight Shank, 7 Pc, 508S-0007

Model: 508S-0007   |    Mpn: 508S-0007   |    Ean: 0641799805317   |    PartNumber: 508S-0007   |   Asin: B00RY558JM

High Speed Steel Straight Shank Item #508S-0007 Inch Set (7 PC) : 6#, 8#, 10#, 1/4'', 5/16'', 3/8'', 1/2''

Features

  • High Speed Steel
  • Straight Shank
  • Inch Set (7 PC) : 6#, 8#, 10#, 1/4'', 5/16'', 3/8'', 1/2''
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Brand: Accusize Industrial Tools   |   Manufacturer: Accusize Co., Ltd.

Item Dimensions: 12.2 x 9.45 x 2.76 inches (31.0 x 24.0 x 7.0 cm)   |   Package Dimensions: 2.4 x 7.1 x 8.3 inches (6.1 x 18.0 x 21.1 cm)

Amazon Price: $62.00 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $62.00

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  #3

Accusize Industrial Tools 39 Pc Hss Interchangeable Pilot Counterbore Set, Counterbores from 1/4'' up to 1'' by 16ths, 500S-A000

Model: 500S-A000   |    Mpn: 500S-A000   |    Ean: 0641799805218   |    PartNumber: 500S-A000   |   Asin: B00I3OWB3Y

The 13 pcs interchange counterbore and their correspondent pilot chart:
Counterbore Size: 1/4''; Pilot Hole Size: 3/32"; Range of Pilot Sizes: 1/8"-3/16"; Shank for Counterbore:15/64"; Overall Length: 3-13/16" Counterbore Size: 5/16''; Pilot Hole Size: 3/32"; Range of Pilot Sizes: 1/8"-1/4"; Shank for Counterbore:19/64"; Overall Length: 3-13/16" Counterbore Size: 3/8''; Pilot Hole Size: 5/32"; Range of Pilot Sizes: 3/16''-5/16"; Shank for Counterbore:5/16"; Overall Length: 4-1/16" Counterbore Size: 7/16''; Pilot Hole Size: 5/32"; Range of Pilot Sizes: 3/16''-3/8"; Shank for Counterbore:3/8"; Overall Length: 4-1/16" Counterbore Size: 1/2''; Pilot Hole Size: 3/16"; Range of Pilot Sizes: 1/4-7/16"; Shank for Counterbore:7/16"; Overall Length: 4-5/16" Counterbore Size: 9/16''; Pilot Hole Size: 3/16"; Range of Pilot Sizes: 1/4"-1/2"; Shank for Counterbore:7/16"; Overall Length: 4-5/16" Counterbore Size: 5/8''; Pilot Hole Size: 3/16"; Range of Pilot Sizes: 1/4"-9/16"; Shank for Counterbore:1/2"; Overall Length: 5-1/8" Counterbore Size: 11/16''; Pilot Hole Size: 3/16"; Range of Pilot Sizes: 1/4"-5/8"; Shank for Counterbore:1/2"; Overall Length: 5-1/8" Counterbore Size: 3/4''; Pilot Hole Size: 1/4"; Range of Pilot Sizes: 5/16''-11/16''; Shank for Counterbore:1/2"; Overall Length: 5-3/8" Counterbore Size: 13/16''; Pilot Hole Size: 1/4"; Range of Pilot Sizes: 5/16''-3/4''; Shank for Counterbore:5/8"; Overall Length: 5-3/8" Counterbore Size: 7/8''; Pilot Hole Size: 1/4"; Range of Pilot Sizes: 5/16''-13/16''; Shank for Counterbore:3/4"; Overall Length: 5-3/8" Counterbore Size: 15/16''; Pilot Hole Size: 1/4"; Range of Pilot Sizes: 5/16''-7/8''; Shank for Counterbore:3/4"; Overall Length: 6-1/8" Counterbore Size: 1''; Pilot Hole Size: 5/16"; Range of Pilot Sizes: 3/8'-15/16''; Shank for Counterbore:3/4"; Overall Length: 6-3/8"

Features

  • Complete with pilots in fitted case
  • Each set includes:13 counterbores-26 pilots
  • Counterbores: 1/4 to 1 by 16ths
  • Soild wood excellent packing
  • Straight shank
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Brand: Accusize Industrial Tools   |   Manufacturer: Accusize Co., Ltd.

Item Dimensions: 12.2 x 3.54 x 18.5 inches (31.0 x 9.0 x 47.0 cm)   |   Package Dimensions: 3.11 x 9.21 x 14.88 inches (7.9 x 23.4 x 37.8 cm)

Amazon Price: $262.40 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $262.40

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  #4

Accusize Industrial Tools 7 Pc'' H.S.S. Solid Capscrew Counterbore Set 3 Flute Straight Shank, 509S-0007

Model: 509S-0007   |    Mpn: 509S-0007   |    Ean: 0641799805331   |    PartNumber: 509S-0007   |   Asin: B00SNN0D30

Inch Sizes: 6#, 8#,10#, 1/4'', 5/16'', 3/8'', 1/2'' H.S.S.. Packed in Solid Strong Wooden Box Straight Shank Bright Finished Premium Quality

Features

  • Inch Sizes: 6#, 8#,10#, 1/4'', 5/16'', 3/8'', 1/2''
  • H.S.S.; Straight Shank
  • Bright Finished
  • Premium Quality
  • Packed in Solid Strong Wooden Box
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Brand: Accusize Industrial Tools   |   Manufacturer: Accusize Co., Ltd.

Item Dimensions: 4.72 x 1.57 x 8.27 inches (12.0 x 4.0 x 21.0 cm)   |   Package Dimensions: 1.97 x 5.2 x 8.58 inches (5.0 x 13.2 x 21.8 cm)

Amazon Price: $73.00 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $73.00

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  #5

Accusize Industrial Tools 7 Pc Metric Hss Solid Capscrew Counterbore Set, 3 Flute, Straight Shank, 508S-007m

Model: 508S-007M   |    Mpn: 508S-007M   |    Ean: 0641799805324   |    PartNumber: 508S-007M   |   Asin: B00HV023F2

Metric HSS Solid Capscrew Counterbore 7 Pcs/Set, 3 Flute, Straight Shank, 508S-007M Metric Set (7PC): M3, M4, M5, M6, M8, M10, M12 H.S.S. Straight Shank

Features

  • Metric Set (7PC): M3, M4, M5, M6, M8, M10, M12
  • 3 Flute
  • High Speed Steel
  • Straight Shank
  • Shank sizes: M3-5.5mm/.218, M4-7.9mm/.312, M5-7.9mm/.312, M6-12.7mm/.500, M8-12.7mm/.500, M110-12.7mm/.500, M12-15.8mm/.625+
  • See more on Amazon...

Brand: Accusize Industrial Tools   |   Manufacturer: Accusize Co., Ltd.

Item Dimensions: 9.45 x 2.76 x 8.27 inches (24.0 x 7.0 x 21.0 cm)   |   Package Dimensions: 2.36 x 7.24 x 8.43 inches (6.0 x 18.4 x 21.4 cm)

Amazon Price: $59.00 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $64.00

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  #6

Alvord Polk 500 High-Speed Steel Counterbore, Built-In Pilot, Uncoated (Bright) Finish, 8-32 (On Size) Size

Model: 03009   |    Mpn: 3009   |    Ean: 0662783030096   |    PartNumber: 3009   |   Asin: B002PHNFKS

Counterbores are cutting tools that have a pilot to guide them into a previously drilled hole. They are used to form a recess or pocket for a socket head capscrew. These tools are of a solid high speed steel construction. High speed steel is a common general purpose material for cutting tools and is used to cut a variety of different materials.

Features

  • Used to enlarge existing holes
  • One piece construction including the pilot
  • Round shank tools are cylindrical and should be held in a good quality tool holder in order to prevent the counterbore from slipping in high torque applications
  • High-speed steel is a common general purpose steel for cutting tools, is compatible with a variety of materials, and tends to be lower in price
  • Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications.
  • See more on Amazon...

Brand: Alvord Polk   |   Manufacturer: Alvord Polk

Package Dimensions: 0.3 x 0.3 x 4.8 inches (0.8 x 0.8 x 12.2 cm)

Amazon Price: $24.80 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 1 to 4 weeks
List Price: $24.80

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  #7

1 1/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.125" Diameter, 1-1/8), 52236, USA Made

Model: 52236   |    Mpn: 52236   |    PartNumber: 52236   |   Asin: B00PM4RSDG

1 1/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.125" Diameter, 1-1/8), 52236, USA Made

Features

  • For counterboring and spotfacing in applications where machine requires a smaller shank
  • 1/64 Corner Radius, Tool Diameter Tolerance: +.001/-0. Shank Diameter Tolerance: +0/-.001
  • Pilot Hole Diameter:3/16, If using a pilot this is the shank diameter of the pilot you should choose
  • Minimum Cut Diameter: .219 Because there is a pilot hole the tool will not cut below this diameter.
  • Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
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Brand: Super Tool   |   Manufacturer: Super Tool

Item Dimensions: 1.12 x 1.12 x 2.75 inches (2.8 x 2.8 x 7.0 cm)   |   Package Dimensions: 1.22 x 1.3 x 5.43 inches (3.1 x 3.3 x 13.8 cm)

Amazon Price: $118.35 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $111.65

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  #8

Alvord Polk 401 High-Speed Steel Counterbore, Built-In Pilot, Uncoated (Bright) Finish, 3mm Size

Model: 03080   |    Mpn: 3080   |    Ean: 0662783030805   |    PartNumber: 3080   |   Asin: B002PHNFW6

Counterbores are cutting tools that have a pilot to guide them into a previously drilled hole. They are used to form a recess or pocket for a socket head capscrew. These tools are of a solid high speed steel construction. High speed steel is a common general purpose material for cutting tools and is used to cut a variety of different materials.

Features

  • Used to enlarge existing holes
  • One piece construction including the pilot
  • Round shank tools are cylindrical and should be held in a good quality tool holder in order to prevent the counterbore from slipping in high torque applications
  • High-speed steel is a common general purpose steel for cutting tools, is compatible with a variety of materials, and tends to be lower in price
  • Uncoated (bright) tools have no finish or coating. They are a good choice for general purpose applications.
  • See more on Amazon...

Brand: Alvord Polk   |   Manufacturer: Alvord Polk

Package Dimensions: 0.3 x 0.4 x 4.3 inches (0.8 x 1.0 x 10.9 cm)

Amazon Price: $26.88 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 1 to 3 months
List Price: $26.88

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  #9

HHIP 2007-0010#10 x 13/64 HSS 3 Flute Solid Pilot Counterbore

Model: 2007-0010   |    Mpn: 2007-0010   |    Ean: 0769053007106   |    PartNumber: 2007-0010   |   Asin: B00N40F5W6

Continuous pilot counterbores cut rapidly, smoothly and accurately, producing long spiraling chips rather than small metal particles The pilot extends the full Length of the flute portion of the tool As cutter flutes are Ground back due to wear, a new section of pilot becomes exposed The pilot head may be cut off to any desired Length when repeated sharpening make it too long for practical use Continuous pilot counterbores have a life many times that of the conventional type counterbore.

Features

  • Cap Screw #10; Cutter Diameter 21/64"
  • Pilot Diameter 13/64; Shank Diameter 5/16
  • Continuous pilot counterbores cut rapidly, smoothly and accurately, producing long spiraling chips rather than small metal particles Length 3-1/2
  • Individual counterbores The pilot extends the full Length of the flute portion of the tool; High speed steel
  • Length 3-1/2
  • See more on Amazon...

Brand: HHIP   |   Manufacturer: HHIP

Item Dimensions: 6 x 1 x 3 inches (15.2 x 2.5 x 7.6 cm)   |   Package Dimensions: 1.02 x 1.93 x 5.87 inches (2.6 x 4.9 x 14.9 cm)

Amazon Price: $9.08 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $12.12

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  #10

7/16" Interchangeable Pilot Counterbore

 PartNumber: 17751877493   |   Asin: B008RYNLNY

Overall Length - 4 1/16", Shank Diameter - 3/8" x 3 1/16", Pilot Hole Diameter - 5/32". Used in spot facing and counterboring operations. . These counterbores can be used with a wide variety of pilots. The shank diameter of the pilots ordered must be the same as the pilot hole size in the counterbore. We stock a complete range of pilots; please inquire.

Features

Brand: Meda - Superior Import   |   Manufacturer: Meda - Superior Import

Amazon Price: $26.95 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 2-3 business days
List Price: $26.95

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  #11

HHIP 2007-0021 21 Piece HSS Interchangeable Pilot Counterbore Set

Model: 2007-0021   |    Mpn: 2007-0021   |    Ean: 0769053007137   |    PartNumber: 2007-0021   |   Asin: B00N40FDD2

21 Piece High Speed Steel Interchangeable Pilot Counterbore Set ~ Supplied in a fitted case. ~ 14 pilots with a 5/32" shank including 0.187, 0.204, 0.213, 0.229, 1/4, 17/64, 9/32, 5/16, 21/64, 11/32, 3/8, 25/64, 13/32 and 7/16. ~ 6 counterbores including 5/16, 3/8, 7/16, 1/2, 9/16 and 5/8. ~ 1 Holder with a 3/8" shank. ~ Straight shank.

Features

  • 21 PIECE HSS INTERCHANGEABLE PILOT COUNTER Bore SET; 14 Pilots: 5/32" Shank : 0.187, 0.204, 0.213, 0.229, 1/4, 17/64, 9/32, 5/16, 21/64, 11/32, 3/8,
  • 25/64, 13/32 & 7/16; 6 Counterbores: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, Straight Shank
  • 1 Holder: 3/8 Shank , Supplied in fitted case
  • Straight Shank; High speed steel
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Brand: HHIP   |   Manufacturer: ABS Import Tools Inc.

Item Dimensions: 3 x 3 x 6 inches (7.6 x 7.6 x 15.2 cm)   |   Package Dimensions: 3.1 x 3.6 x 7.1 inches (7.9 x 9.1 x 18.0 cm)

First Available: 2017-11-25

Amazon Price: $120.27 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $120.27

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  #12

Drill America DEWPIL9/32X1/4 Counterbore Pilot, 9/32" x 1/4"

Model: DEWPIL9/32X1/4   |    Mpn: DEWPIL9/32X1/4   |    Ean: 0887861163941   |    PartNumber: DEWPIL9/32X1/4   |   Asin: B01BQ2RTT0

Counter bore Pilot: 9/32X1/4.

Features

Brand: Drill America   |   Manufacturer: Drill America

Package Dimensions: 3 x 6 x 6 inches (7.6 x 15.2 x 15.2 cm)

Amazon Price: $9.97 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $9.97

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  #13

1 3/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.375" Diameter, 1-3/8), 52244, USA Made

Model: 52244   |    Mpn: 52244   |    PartNumber: 52244   |   Asin: B00PM45X8S

1 3/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.375" Diameter, 1-3/8), 52244, USA Made

Features

  • For counterboring and spotfacing in applications where machine requires a smaller shank
  • 1/64 Corner Radius, Tool Diameter Tolerance: +.001/-0. Shank Diameter Tolerance: +0/-.001
  • Pilot Hole Diameter:1/4, If using a pilot this is the shank diameter of the pilot you should choose
  • Minimum Cut Diameter: .281 Because there is a pilot hole the tool will not cut below this diameter.
  • Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
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Brand: Super Tool   |   Manufacturer: Super Tool

Item Dimensions: 1.37 x 1.37 x 2.75 inches (3.5 x 3.5 x 7.0 cm)   |   Package Dimensions: 1.61 x 1.69 x 5.31 inches (4.1 x 4.3 x 13.5 cm)

Amazon Price: $125.80 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $118.70

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  #14

3/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/8" OAL, (.375" Diameter), 52212, USA Made

Model: 52212   |    Mpn: 52212   |    PartNumber: 52212   |   Asin: B00PM4SE1Q

3/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/8" OAL, (.375" Diameter), 52212, USA Made

Features

  • For counterboring and spotfacing in applications where machine requires a smaller shank
  • 1/64 Corner Radius, Tool Diameter Tolerance: +.001/-0. Shank Diameter Tolerance: +0/-.001
  • Pilot Hole Diameter:3/32, If using a pilot this is the shank diameter of the pilot you should choose
  • Minimum Cut Diameter: .125 Because there is a pilot hole the tool will not cut below this diameter.
  • Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
  • See more on Amazon...

Brand: Super Tool   |   Manufacturer: Super Tool

Item Dimensions: 0.37 x 0.37 x 2.37 inches (0.9 x 0.9 x 6.0 cm)   |   Package Dimensions: 0.63 x 0.75 x 3.35 inches (1.6 x 1.9 x 8.5 cm)

Amazon Price: $52.00 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $49.05

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  #15

5/16" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/8" OAL, (.3125" Diameter), 52210, USA Made

Model: 52210   |    Mpn: 52210   |    PartNumber: 52210   |   Asin: B00PM45SG0

5/16" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/8" OAL, (.3125" Diameter), 52210, USA Made

Features

  • For counterboring and spotfacing in applications where machine requires a smaller shank
  • 1/64 Corner Radius, Tool Diameter Tolerance: +.001/-0. Shank Diameter Tolerance: +0/-.001
  • Pilot Hole Diameter:3/32, If using a pilot this is the shank diameter of the pilot you should choose
  • Minimum Cut Diameter: .125 Because there is a pilot hole the tool will not cut below this diameter.
  • Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
  • See more on Amazon...

Brand: Super Tool   |   Manufacturer: Super Tool

Item Dimensions: 0.31 x 0.31 x 2.37 inches (0.8 x 0.8 x 6.0 cm)   |   Package Dimensions: 0.55 x 0.75 x 3.19 inches (1.4 x 1.9 x 8.1 cm)

Amazon Price: $50.85 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $47.95

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  #16

Union Butterfield 4704 High-Speed Steel Counterbore, Uncoated (Bright) Finish, 3/32" Body Dia, 3/16" Pilot Dia

Model: 3210116   |    Mpn: 47043/16X3/32   |    Ean: 0698464076749   |    PartNumber: 47043/16X3/32   |   Asin: B003JY6Z26

Features

  • High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
  • Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications
  • Round shanks allow use with a wide variety of toolholding systems
  • Detachable Pilot
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Brand: Union Butterfield   |   Manufacturer: Precision Dormer

Package Dimensions: 0.1 x 0.5 x 3 inches (0.3 x 1.3 x 7.6 cm)

Amazon Price: $9.23 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 1-2 business days
List Price: $9.23

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  #17

5/16" Counterbore, Carbide Tipped, 3 Flutes, 19/64" Shank Diameter, Straight Shank, 3 13/16" OAL, USA Made, (.3125" Diameter), 56402

Model: 56402   |    Mpn: 56402   |    PartNumber: 56402   |   Asin: B00PM43WCC

5/16" Counterbore, Carbide Tipped, 3 Flutes, 19/64" Shank Diameter, Straight Shank, 3 13/16" OAL, USA Made, (.3125" Diameter), 56402

Features

  • For Counterboring most materials
  • Tool diameter tolerance: +.001/-0. Shank Diameter Tolerance: +0/-.0005
  • Pilot Hole Diameter:3/32, If using a pilot this is the shank diameter of the pilot you should choose
  • Minimum Cut Diameter: .114 Because there is a pilot hole the tool will not cut below this diameter.
  • Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)
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Brand: Super Tool   |   Manufacturer: Super Tool

Item Dimensions: 0.31 x 0.31 x 3.81 inches (0.8 x 0.8 x 9.7 cm)   |   Package Dimensions: 0.55 x 0.71 x 4.21 inches (1.4 x 1.8 x 10.7 cm)

Amazon Price: $68.15 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 1-2 business days
List Price: $64.30

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  #18

Drill America 11/16" X 3/16" Pilot Hole High Speed Steel Straight Shank Counterbore, Dew Series

Model: DEWCBR11/16   |    Mpn: DEWCBR11/16   |    Ean: 0887861129213   |    PartNumber: DEWCBR11/16   |   Asin: B01H5G3KT4

Drill America qualtech decor series aircraft counter bore. Counter boring is the enlargement of a portion of a hole that has previously been formed. If the counter bored portion is shallow (1/inches or less), the operation is usually known as spot-facing; for example, a flat Seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counter boring. This counter bore is made of two-piece construction, having an integral shank and counter bore-cutter, and a pilot that is interchangeable, which provides flexibility in the use of the tool. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Round shanks allow use with a wide variety of tool holding systems.

Features

  • Counter bore
  • High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
  • Round shanks allow use with a wide variety of tool holding systems
  • Counter boring is the enlargement of a portion of a hole that has previously been formed
  • The counter bore is a two-piece construction, having an integral shank and counter bore-cutter, and a pilot that is interchangeable, which provides flexibility in the use of the tool
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Brand: Drill America   |   Manufacturer: Drill America

Package Dimensions: 0.7 x 0.9 x 5.7 inches (1.8 x 2.3 x 14.5 cm)

Amazon Price: $28.04 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 2-3 business days
List Price: $35.61

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  #19

HHIP 2007-0034 High Speed Steel 3 Flute Solid Pilot Counterbore, 3/4" x 13/16"

Model: 2007-0034   |    Mpn: 2007-0034   |    Ean: 0769053092898   |    PartNumber: 2007-0034   |   Asin: B06Y1TBD26

HHIP 3/4 x 13/16" high speed steel 3 flute solid pilot counter bore is 1-3/16" cutter diameter. Shank diameter is 1". Overall length is 8". Continuous pilot counter bores cut rapidly, smoothly and accurately, producing long spiraling chips rather than small metal particles. The pilot extends the full length of the flute portion of the tool. As cutter flutes are ground back due to wear, a new section of pilot becomes exposed. The pilot head may be cut off to any desired length when repeated sharpening makes it too long for practical use. Continuous pilot counter bores have a life many times that of the conventional type counter bore.

Features

  • Cutter diameter is 1-3/16"
  • Shank diameter is 1
  • Overall length is 8
  • Continuous pilot counter bores cut rapidly, smoothly and accurately, producing long spiraling chips rather than small metal particles
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Brand: HHIP   |   Manufacturer: HHIP

Item Dimensions: 6 x 1 x 3 inches (15.2 x 2.5 x 7.6 cm)   |   Package Dimensions: 1 x 1 x 9 inches (2.5 x 2.5 x 22.9 cm)

First Available: 2017-05-08

Amazon Price: $21.45 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 24 hours
List Price: $21.45

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  #20

49/64" Interchangeable Pilot Counterbore

 PartNumber: 17752087494   |   Asin: B008RYSQ7U

Overall Length - 5 3/8", Shank Diameter - 5/8" x 3 7/8", Pilot Hole Diameter - 1/4". Used in spot facing and counterboring operations. . These counterbores can be used with a wide variety of pilots. The shank diameter of the pilots ordered must be the same as the pilot hole size in the counterbore. We stock a complete range of pilots; please inquire.

Features

Brand: Meda - Superior Import   |   Manufacturer: Meda - Superior Import

Amazon Price: $37.15 | as of 09/14/2019(10:19am pst)
Availibility: Usually ships in 2-3 business days
List Price: $37.15

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