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 and Benefits:
•Able to be used with conventional power tools


•No protruding fixings


•Increase aesthetic appeal of finished product

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Description Price Thread Size Pilot Diameter Pilot Length Cutter Diameter Cutter Length Shank Type Shank Diameter Overall Length Material
RS庫存編號 508-9272
製造零件編號05843
BrandEXACT
HK$99.55
單位
M5 5.5mm - 10mm - Plain 8 mm 80 mm HSS
RS庫存編號 508-9250
製造零件編號05845
BrandEXACT
HK$195.60
單位
M8 9mm - 15mm - Plain 12.5 mm 100 mm HSS
RS庫存編號 508-9036
製造零件編號05841
BrandEXACT
HK$99.06
單位
M3 3.4mm - 6mm - Plain 5 mm 71 mm HSS
RS庫存編號 508-9266
製造零件編號05844
BrandEXACT
HK$96.29
單位
M6 6.6mm - 11mm - Plain 8 mm 80 mm HSS
RS庫存編號 508-9288
製造零件編號05842
BrandEXACT
HK$81.80
單位
M4 4.5mm - 8mm - Plain 5 mm 71 mm HSS
RS庫存編號 508-9244
製造零件編號05846
BrandEXACT
HK$213.52
單位
M10 11mm - 18mm - Plain 12.5 mm 100 mm HSS