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attributes.Drill_Bit_Type

attributes.Pilot_Diameter

attributes.Thread_Size

attributes.Pilot_Length

attributes.Cutter_Diameter

attributes.Cutter_Length

attributes.Shank_Type

attributes.Number_of_Pieces

attributes.Shank_Diameter

attributes.Overall_Length

materials

EXACT Counterbore M6, 80 mm x 11mm Cut Diameter, 1 Piece

EXACT Counterbore Set M3 to M10, 6 Piece

EXACT Counterbore M8, 100 mm x 15mm Cut Diameter, 1 Piece

EXACT Counterbore M10, 100 mm x 18mm Cut Diameter, 1 Piece

EXACT Counterbore M5, 80 mm x 10mm Cut Diameter, 1 Piece

EXACT Counterbore M3, 71 mm x 6mm Cut Diameter, 1 Piece

EXACT Counterbore M4, 71 mm x 8mm Cut Diameter, 1 Piece


Counterbore, or counterbore cutters, are drill-bits used to make counterbore holes, which is a way of creating a flat-bottomed extension of an existing hole in a material. The counterbore cutter will essentially create a cylindrical cavity at the head of an already drilled hole. This allows the hole to accommodate flat bottomed screw or bolts so that they sit flush to the surface of the material, rather than protruding, while still able to perform their function to the fullest.

### When would I need a Counterbore?

The reasons for desiring a counterbore of sunken screw are many. There are aesthetic reasons a manufacturer may want to hide the fixings, in furniture for example, but there are also aerodynamic reasons that are applicable to the aerospace industry.

Counterbores will often be made to be slightly larger than an accommodating bolt, to allow the use of socket wrenches or even screw caps.

### Features of a Counterbore
- Able to be used with conventional power tools
- No protruding fixings.
- Increase the aesthetic appeal of the finished product.


Counterbores

Drill Bits & Parts

Power Tools, Soldering & Welding

3577158573

3859839647

835775905

845068664

Development Tools & Single Board Computers

Raspberry Pi, Arduino, ROCK, STEM Education & Development Tools

Electronic Components, Power & Connectors

Engineering Materials & Industrial Hardware

Pneumatic Counters, Logic Controllers & Timers

Electronics Cleaners & Protective Coatings

RS PRO Counterbore Set M3 to M10, 12 Piece

RS PRO Counterbore Set M3 to M10, 6 Piece

Exact Counterbores

7 Products showing for Exact Counterbores

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