Counterbores

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.

...
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Viewing 1 - 20 of 22 products
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Description Price Drill Bit Type Thread Size Pilot Diameter Pilot Length Cutter Diameter Cutter Length Shank Type Number of Pieces Shank Diameter Overall Length Material
RS Stock No. 132-019
BrandRS PRO
kr 1 644,94
Each
Units
Counterbore Set M3 to M10 - - - - - 12 - - HSS
RS Stock No. 132-031
BrandRS PRO
kr 495,21
Each
Units
Counterbore M12 14mm - 20mm 22mm Plain 1 12.5 mm 100 mm HSS
RS Stock No. 522-7480
BrandRS PRO
kr 725,36
Each
Units
Counterbore M12 13mm 13.5mm 20mm 25.5mm Screwed 1 12 mm 108 mm HSS
RS Stock No. 522-7452
BrandRS PRO
kr 492,92
Each
Units
Counterbore M8 8.4mm 9.5mm 15mm 19mm Screwed 1 10 mm 87.3 mm Steel
RS Stock No. 522-7474
BrandRS PRO
kr 574,12
Each
Units
Counterbore M10 10.5mm 11mm 18mm 19mm Screwed 1 10 mm 89 mm HSS
RS Stock No. 131-864
BrandRS PRO
kr 110,88
Each
Units
Counterbore M4 4.5mm - 8mm 14mm Plain 1 5 mm 71 mm HSS
RS Stock No. 131-870
BrandRS PRO
kr 131,17
Each
Units
Counterbore M6 6.6mm - 11mm 18mm Plain 1 8 mm 80 mm HSS
RS Stock No. 131-858
BrandRS PRO
kr 221,64
Each
Units
Counterbore M8 9mm - 15mm 22mm Plain 1 12.5 mm 100 mm HSS
RS Stock No. 132-025
BrandRS PRO
kr 954,35
Each
Units
Counterbore Set M3 to M10 - - - - - 6 - - HSS
RS Stock No. 522-7446
BrandRS PRO
kr 353,69
Each
Units
Counterbore M6 6.4mm 8mm 11mm 12.5mm Screwed 1 6 mm 76 mm HSS
RS Stock No. 522-7430
BrandRS PRO
kr 312,06
Each
Units
Counterbore M5 5.3mm 6.5mm 10mm 12.5mm Screwed 1 6 mm 70 mm HSS
RS Stock No. 131-886
BrandRS PRO
kr 125,24
Each
Units
Counterbore M3 3.4mm - 6mm 14mm Plain 1 5 mm 71 mm HSS
RS Stock No. 131-842
BrandRS PRO
kr 121,19
Each
Units
Counterbore M5 5.5mm - 10mm 18mm Plain 1 8 mm 80 mm HSS
RS Stock No. 131-993
BrandRS PRO
kr 239,52
Each
Units
Counterbore M10 11mm - 18mm 22mm Plain 1 12.5 mm 100 mm HSS
RS Stock No. 522-7424
BrandRS PRO
kr 278,76
Each
Units
Counterbore M4 4.3mm 5.5mm 8mm 12.5mm Screwed 1 6 mm 65 mm HSS
RS Stock No. 508-9244
Mfr. Part No.05846
BrandEXACT
kr 226,24
Each
Units
Counterbore M10 11mm - 18mm - Plain 1 12.5 mm 100 mm HSS
RS Stock No. 508-9250
Mfr. Part No.05845
BrandEXACT
kr 208,49
Each
Units
Counterbore M8 9mm - 15mm - Plain 1 12.5 mm 100 mm HSS
RS Stock No. 508-9266
Mfr. Part No.05844
BrandEXACT
kr 119,65
Each
Units
Counterbore M6 6.6mm - 11mm - Plain 1 8 mm 80 mm HSS
RS Stock No. 508-9036
Mfr. Part No.05841
BrandEXACT
kr 114,81
Each
Units
Counterbore M3 3.4mm - 6mm - Plain 1 5 mm 71 mm HSS
RS Stock No. 508-9288
Mfr. Part No.05842
BrandEXACT
kr 101,30
Each
Units
Counterbore M4 4.5mm - 8mm - Plain 1 5 mm 71 mm HSS
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