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Cutting Tools - Counterbores


Alvord-Polk Cap Screw Counterbores - High Speed Steel - Straight Shank 
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• Designed for fast feeds and easy cutting
• Features 4 flute, 30Ž right hand spiral
• Available in 3 sizes; standard, 1/64" oversized and 1/32" oversized
• Features polished flutes to eliminate chip clogging
• MADE IN USA

Alvord-Polk Metric Cap Screw Counterbores 
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• For all standard metric socket head cap screws
• All pilot size 5 mm over cap screw size • Complete with wood case
• MADE IN USA

Apt Socket Cap Screw Counterbores - Blade Holders - High Speed Steel 
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• Blades of similar thickness may be interchanged with any pilot holder with corresponding blade slot
• Using the same pilot holder, you can forward counterbore, back counterbore and spot face
• MADE IN USA

Apt Socket Cap Screw Counterbores - Blades - High Speed Steel 
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• Blades of similar thickness may be interchanged with any pilot holder with corresponding blade slot
• Using the same pilot holder, you can forward counterbore, back counterbore and spot face
• MADE IN USA

Apt Socket Cap Screw Counterbores - D Piloted Holders - ˘D Series 
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• Blades of similar thickness may be interchanged with any pilot holder with corresponding blade slot
• Using the same pilot holder, you can forward counterbore, back counterbore and spot face
• MADE IN USA

Apt Socket Cap Screw Counterbores - E Piloted Holders - ˘E Series 
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• Blades of similar thickness may be interchanged with any pilot holder with corresponding blade slot
• Using the same pilot holder, you can forward counterbore, back counterbore and spot face
• MADE IN USA

Cleveland Twist Drill Counterbores - Straight Shank - HSS - Short Series 
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• Use in counterboring and spot facing operations
• Uses a wide range of interchangeable pilots to align the hole that is being machined
• The 3 and 5 flute counterbore reduces chatter and improves finish
• End cutting

Cleveland Twist Drill Interchangeable Pilots for Counterbores 
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•The shank diameter ordered must be the same as the pilot hole diameter in the counterbore
• Interchangeable pilots are made of steel

Weldon "Tu-Lip" Counterbores - High Speed Steel
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  • Designed for "1960 Series" socket head cap screws.
  • Extremely free cutting.
  • Generous chip room in the flutes.
  • Solid pilots without grooves will not ream or mar holes.





Weldon Tu-Lip Counterbores - High Speed Steel - Straight Shank 
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• Use to counterbore holes for ˘1960 Series÷ socket head cap screws
• Ample chip room prevents breakage caused by clogging
• Fast helix of the two flutes provides excellent cutting action
• Features a solid pilot with no grooves to eliminate reaming or marring of the hole
• Sharpening time is reduced since there are only two cutting lips to regrind

XACT 3 Flute Metric Counterbores - High Speed Steel 
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• Use for all standard metric socket head cap screws
• Extra flute length allows double the regrinding life of ordinary solid counterbores
• IMPORT

XACT Capscrew Counterbores - 1/32" Oversize
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  • 30░ Right hand spiral-four flutes.
  • Domestic high speed steel.
  • Controlled heat treatment for long tool life.
  • No chip clogging polished flutes.
  • Designed for fast feeds and easy cutting.
  • Special sizes not featured quoted promptly upon request.





XACT Capscrew Counterbores - 1/64" Oversize
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  • 30░ Right hand spiral-four flutes.
  • Domestic high speed steel.
  • Controlled heat treatment for long tool life.
  • No chip clogging polished flutes.
  • Designed for fast feeds and easy cutting.
  • Special sizes not featured quoted promptly upon request.





XACT Capscrew Counterbores - On-Size
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  • 30░ Right hand spiral-four flutes.
  • Domestic high speed steel.
  • Controlled heat treatment for long tool life.
  • No chip clogging polished flutes.
  • Designed for fast feeds and easy cutting.
  • Special sizes not featured quoted promptly upon request.





XACT Counterbores - High Speed Steel - Short Series - Straight Shank 
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• Use in counterboring and spot facing operations
• Uses a wide range of interchangeable pilots to align the hole that is being machined
• End cutting
• The 3 and 5 flute counterbore reduces chatter and improves finish

XACT Counterbores and Pilots - Carbide Tipped Counterbores 
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• Use for spot facing and counterbore operations
• Interchangeable pilots mount to the face of the counterbore tool with a set screw to locate pilot hole
• Standard cutting diameter tolerance: +.001"/ -.000"
• Carbide tips are brazed to hardened tool steel shanks
• Right hand polished spiral flutes
• Shank diameter: +.000"/ -.0005"

XACT Counterbores and Pilots - Interchangeable Pilots for Counterbores 
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• Use to locate the pilot hole for counterboring operations
• The shank diameter ordered must be the same as the pilot hole diameter in the counterbore
• The pilot diameter is always larger than the pilot shank diameter and is determined by part to be machined
• Interchangeable pilots are made of steel
• Shank diameter tolerance: +.0000" -.0005"
• Pilot diameter tolerance: 1/8" to 1/4" -.001" -.002" 9/32" to 7/8" -.003" -.004"
15/16" to 1-1/8" -.005" -.006"
• IMPORT

XACT Interchangeable Pilot Counterbore Pilots
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XACT Interchangeable Pilot Counterbores
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  • High Speed Steel.
  • Straight Shank.
  • Short Series.





  • XACT Interchangeable Pilot Counterbores - Aircraft Style
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    • For aircraft and light metals.
    • 1/4" Shank.
    • Can be used in 1/4" electric or pneumatic drills.
    • 4 Flute.





    XACT Socket Cap Screw Counterbores - Morse Taper Shank - High Speed Steel 
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    • Use for enlarging holes for the socket heads of cap screws
    • Features an oversized solid pilot
    • IMPORT

    XACT Socket Cap Screw Counterbores - Straight Shank - High Speed Steel and M-42 Cobalt 
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    • Use for enlarging holes for the socket heads of cap screws
    • Use M-42 cobalt on high alloy steels, stainless steels, titanium, inconel and other difficult-to-machine materials
    • Features an oversized solid pilot
    • IMPORT

    XACT USA Made Aircraft Counterbores and Spot Facers - 1/2" Maximum Shank - Long Series - High Speed Steel 
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    • Use for counterboring and spot facing operations
    • Available in long type with 1/2" maximum shank diameter or short type with 1/4" shank diameter
    • Designed for use in pneumatic or electric drills
    • 4 Flute
    • MADE IN USA

    XACT USA Made Aircraft Counterbores and Spot Facers - 1/4" Shank - Short Series - High Speed Steel 
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    • Use for counterboring and spot facing operations
    • Available in long type with 1/2" maximum shank diameter or short type with 1/4" shank diameter
    • Designed for use in pneumatic or electric drills
    • 4 Flute
    • MADE IN USA

    XACT USA Made Continuous Pilot Cap Screw Counterbores - High Speed Steel - Straight Shank 
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    • The pilot extends the whole length of the fluted portion of the tool to allow for more regrinds than other counterbores
    • Cuts rapidly and smoothly with high accuracy
    • MADE IN USA

    XACT USA Made Continuous Pilot Cap Screw Counterbores - Straight Shank 6 Piece Set - HSS - Straight Shank 
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    • The pilot extends the whole length of the fluted portion of the tool to allow for more regrinds than other counterbores
    • Cuts rapidly and smoothly with high accuracy
    • MADE IN USA

    XACT USA Made Continuous Pilot Cap Screw Counterbores - Straight Shank 7 Piece Set - HSS - Straight Shank 
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    • The pilot extends the whole length of the fluted portion of the tool to allow for more regrinds than other counterbores
    • Cuts rapidly and smoothly with high accuracy
    • MADE IN USA

    XACT USA Made Counterbores - High Speed Steel - Short Series - Straight Shank 
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    • Use in counterboring and spot facing operations
    • Uses a wide range of interchangeable pilots to align the hole that is being machined
    • End cutting
    • The 3 and 5 flute counterbore reduces chatter and improves finish


    Servicing Industry Since 1968

    Have a Question or Need Technical Assistance? For Personal Service Click Here to contact a NSS dealer for your state.