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 522-7452
BrandRS PRO
HK$264.35
單位
M8 8.4mm 9.5mm 15mm 19mm Screwed 10 mm 87.3 mm Steel
RS庫存編號 131-842
BrandRS PRO
HK$149.21
單位
M5 5.5mm - 10mm 18mm 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 508-9272
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 522-7430
BrandRS PRO
HK$170.37
單位
M5 5.3mm 6.5mm 10mm 12.5mm Screwed 6 mm 70 mm HSS
RS庫存編號 131-993
BrandRS PRO
HK$273.01
單位
M10 11mm - 18mm 22mm Plain 12.5 mm 100 mm HSS
RS庫存編號 131-858
BrandRS PRO
HK$217.31
單位
M8 9mm - 15mm 22mm Plain 12.5 mm 100 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 508-9244
製造零件編號05846
BrandEXACT
HK$213.52
單位
M10 11mm - 18mm - Plain 12.5 mm 100 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 131-864
BrandRS PRO
HK$137.56
單位
M4 4.5mm - 8mm 14mm Plain 5 mm 71 mm HSS
RS庫存編號 131-870
BrandRS PRO
HK$183.63
單位
M6 6.6mm - 11mm 18mm Plain 8 mm 80 mm HSS
RS庫存編號 131-886
BrandRS PRO
HK$160.51
單位
M3 3.4mm - 6mm 14mm Plain 5 mm 71 mm HSS
RS庫存編號 522-7480
BrandRS PRO
HK$377.82
單位
M12 13mm 13.5mm 20mm 25.5mm Screwed 12 mm 108 mm HSS
RS庫存編號 522-7474
BrandRS PRO
HK$291.72
單位
M10 10.5mm 11mm 18mm 19mm Screwed 10 mm 89 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 522-7446
BrandRS PRO
HK$179.14
單位
M6 6.4mm 8mm 11mm 12.5mm Screwed 6 mm 76 mm HSS
RS庫存編號 522-7424
BrandRS PRO
HK$157.55
單位
M4 4.3mm 5.5mm 8mm 12.5mm Screwed 6 mm 65 mm HSS
RS庫存編號 132-031
BrandRS PRO
HK$336.75
單位
M12 14mm - 20mm 22mm Plain 12.5 mm 100 mm HSS