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.



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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Description Price Drill Bit Type Thread Size Pilot Diameter Pilot Length Cutter Diameter Cutter Length Shank Type Material Number of Pieces Shank Diameter Overall Length
RS庫存編號 508-9272
製造零件編號05843
BrandEXACT
TWD419.00
單位
Counterbore M5 5.5mm - 10mm - Plain HSS 1 8 mm 80 mm
RS庫存編號 508-9266
製造零件編號05844
BrandEXACT
TWD445.00
單位
Counterbore M6 6.6mm - 11mm - Plain HSS 1 8 mm 80 mm
RS庫存編號 508-9288
製造零件編號05842
BrandEXACT
TWD378.00
單位
Counterbore M4 4.5mm - 8mm - Plain HSS 1 5 mm 71 mm
RS庫存編號 508-9238
製造零件編號05863
BrandEXACT
TWD3,404.00
整套:1 個
Set(s)
Counterbore Set M3 to M10 - - - - - HSS 6 - -
RS庫存編號 508-9250
製造零件編號05845
BrandEXACT
TWD776.00
單位
Counterbore M8 9mm - 15mm - Plain HSS 1 12.5 mm 100 mm
RS庫存編號 508-9244
製造零件編號05846
BrandEXACT
TWD820.00
單位
Counterbore M10 11mm - 18mm - Plain HSS 1 12.5 mm 100 mm
RS庫存編號 508-9036
製造零件編號05841
BrandEXACT
TWD427.00
單位
Counterbore M3 3.4mm - 6mm - Plain HSS 1 5 mm 71 mm