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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Detalii produs Marca Thread Size Pilot Diameter Pilot Length Cutter Diameter Cutter Length Shank Type Shank Diameter Overall Length Material
HSS M4 71 mm Counterbore Drill Bit, 8mm Cutter Diameter, 5 mm Plain Shank EXACT M4 4.5mm - 8mm - Plain 5 mm 71 mm HSS
HSS M3 71 mm Counterbore Drill Bit, 6mm Cutter Diameter, 5 mm Plain Shank RS Pro M3 3.4mm - 6mm 14mm Plain 5 mm 71 mm HSS
HSS M8 100 mm Counterbore Drill Bit, 15mm Cutter Diameter, 12.5 mm Plain Shank EXACT M8 9mm - 15mm - Plain 12.5 mm 100 mm HSS
HSS M6 80 mm Counterbore Drill Bit, 11mm Cutter Diameter, 8 mm Plain Shank RS Pro M6 6.6mm - 11mm 18mm Plain 8 mm 80 mm HSS
HSS M5 80 mm Counterbore Drill Bit, 10mm Cutter Diameter, 8 mm Plain Shank EXACT M5 5.5mm - 10mm - Plain 8 mm 80 mm HSS
HSS M5 80 mm Counterbore Drill Bit, 10mm Cutter Diameter, 8 mm Plain Shank RS Pro M5 5.5mm - 10mm 18mm Plain 8 mm 80 mm HSS
HSS M6 76 mm Counterbore Drill Bit, 11mm Cutter Diameter, 6 mm Screwed Shank RS Pro M6 6.4mm 8mm 11mm 12.5mm Screwed 6 mm 76 mm HSS
HSS M12 100 mm Counterbore Drill Bit, 20mm Cutter Diameter, 12.5 mm Plain Shank RS Pro M12 14mm - 20mm 22mm Plain 12.5 mm 100 mm HSS
HSS M6 80 mm Counterbore Drill Bit, 11mm Cutter Diameter, 8 mm Plain Shank EXACT M6 6.6mm - 11mm - Plain 8 mm 80 mm HSS
HSS M10 100 mm Counterbore Drill Bit, 18mm Cutter Diameter, 12.5 mm Plain Shank EXACT M10 11mm - 18mm - Plain 12.5 mm 100 mm HSS
HSS M10 100 mm Counterbore Drill Bit, 18mm Cutter Diameter, 12.5 mm Plain Shank RS Pro M10 11mm - 18mm 22mm Plain 12.5 mm 100 mm HSS
Steel M8 87.3 mm Counterbore Drill Bit, 15mm Cutter Diameter, 10 mm Screwed Shank RS Pro M8 8.4mm 9.5mm 15mm 19mm Screwed 10 mm 87.3 mm Steel
HSS M3 71 mm Counterbore Drill Bit, 6mm Cutter Diameter, 5 mm Plain Shank EXACT M3 3.4mm - 6mm - Plain 5 mm 71 mm HSS
HSS M4 71 mm Counterbore Drill Bit, 8mm Cutter Diameter, 5 mm Plain Shank RS Pro M4 4.5mm - 8mm 14mm Plain 5 mm 71 mm HSS
HSS M12 108 mm Counterbore Drill Bit, 20mm Cutter Diameter, 12 mm Screwed Shank RS Pro M12 13mm 13.5mm 20mm 25.5mm Screwed 12 mm 108 mm HSS
HSS M10 89 mm Counterbore Drill Bit, 18mm Cutter Diameter, 10 mm Screwed Shank RS Pro M10 10.5mm 11mm 18mm 19mm Screwed 10 mm 89 mm HSS
HSS M8 100 mm Counterbore Drill Bit, 15mm Cutter Diameter, 12.5 mm Plain Shank RS Pro M8 9mm - 15mm 22mm Plain 12.5 mm 100 mm HSS
HSS M4 65 mm Counterbore Drill Bit, 8mm Cutter Diameter, 6 mm Screwed Shank RS Pro M4 4.3mm 5.5mm 8mm 12.5mm Screwed 6 mm 65 mm HSS
HSS M5 70 mm Counterbore Drill Bit, 10mm Cutter Diameter, 6 mm Screwed Shank RS Pro M5 5.3mm 6.5mm 10mm 12.5mm Screwed 6 mm 70 mm HSS
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