Countersinks

Countersink cutter drill bits are designed to fit directly into manual, electric and cordless drill driver attachments and have hexagonal or round shanks. Countersink cutters are used to create a chamfer around the rim of a pilot hole enabling the head of a countersunk screw to sit flush. Countersink cutters can also be used to remove the burr left from a drilling or tapping operation.


Types of Countersink Cutters



  • Cross-Hole Countersink Cutter: These have a hole that goes through the side of the cone that provides the cutting edge. These countersink cutters are suitable for deburring and can also be used in soft materials such as wood or plastic to create a countersunk hole. The design of these countersink cutters means that they are free from mechanical vibration or 'chatter' and they also stay in the centre.

  • Fluted Countersink cutter: These have fluted blades that produce a heavy chamfer to create the correct seating for a countersunk-head screw. Countersink cutters are available with six different cutting angles but the most common are 82° and 90°. The number of flutes on the countersink cutter can also vary.

  • Single fluted: These have less chatter or mechanical vibration than multi-fluted and are ideal for use in small holes for general-purpose countersinking, chamfering and deburring. These are designed for machine use and light portable work when operating at higher speeds.

  • Three fluted: These are designed for a chatter-free performance and are used mainly in portable applications at slower speeds. The design of these countersinks gives them a good centring ability.

  • Four fluted: These have good radial relief

  • Five Fluted: These have a rugged design and the odd number of flutes minimises chatter.

  • Six fluted: These are ideal for producing fast shearing cuts.


These countersink cutter drill bits are made from HSS (High-Speed Steel) which can withstand high temperatures without losing its hardness.


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Omschrijving Prijs Drill Bit Type Head Diameter Countersink Angle Number of Flutes Material Overall Length Number of Pieces Shank Diameter Shank Length
RS-stocknr. 218-567
FabrikantRS PRO
53,51 €
Each
Aantal stuks
Countersink Set 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm, 20.5 mm 90° 3 HSS - 6 - -
RS-stocknr. 673-8708
FabrikantRS PRO
8,62 €
Each
Aantal stuks
Countersink 12.4mm 90° 3 HSS 56 mm 1 8 mm 41mm
RS-stocknr. 456-898
FabrikantRS PRO
12,76 €
Each
Aantal stuks
Countersink 12mm - 3 HSS 120 mm 1 - -
RS-stocknr. 673-8701
FabrikantRS PRO
6,34 €
Each
Aantal stuks
Countersink 8.3mm 90° 3 HSS 50 mm 1 6 mm 38mm
RS-stocknr. 215-423
FabrikantRS PRO
9,91 €
Each
Aantal stuks
Countersink 5mm 90° - HSS 45 mm 1 6 mm 32mm
RS-stocknr. 673-8697
FabrikantRS PRO
53,48 €
1 Set
Set(s)
Countersink Set 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm, 20.5 mm 90° 3 HSS - 6 - -
RS-stocknr. 673-8710
FabrikantRS PRO
16,72 €
Each
Aantal stuks
Countersink 20.5mm 90° 3 HSS 63 mm 1 10 mm 42mm
RS-stocknr. 248-5576
FabrikantRS PRO
70,38 €
Each
Aantal stuks
Countersink Set 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm, 20.5 mm - - - - 6 - -
RS-stocknr. 423-838
FabrikantRS PRO
17,91 €
Each
Aantal stuks
Countersink 15.3mm 90° 5 HSS 32 mm 1 7.15 mm 21.5mm
RS-stocknr. 456-905
FabrikantRS PRO
18,08 €
Each
Aantal stuks
Countersink 25mm 90° 3 HSS 145 mm 1 - -
RS-stocknr. 218-624
FabrikantRS PRO
20,64 €
Each
Aantal stuks
Countersink 25mm 90° 3 HSS - 1 - -
RS-stocknr. 673-8717
FabrikantRS PRO
12,69 €
Each
Aantal stuks
Countersink 16.5mm 90° 3 HSS 63 mm 1 10 mm 42mm
RS-stocknr. 215-467
FabrikantRS PRO
44,65 €
Each
Aantal stuks
Countersink Set 2 mm, 5 mm, 10 mm, 15 mm, 20 mm 90° - HSS - 4 - -
RS-stocknr. 423-848
FabrikantRS PRO
20,50 €
Each
Aantal stuks
Countersink 14mm 90° - HSS 48 mm 1 7.15 mm 20mm
RS-stocknr. 215-489
FabrikantRS PRO
11,75 €
Each
Aantal stuks
Countersink 10mm 90° - HSS 48 mm 1 8 mm 30.5mm
RS-stocknr. 423-850
FabrikantRS PRO
32,44 €
Each
Aantal stuks
Countersink 21mm 90° - HSS 65 mm 1 7.15 mm 20mm
RS-stocknr. 673-8691
FabrikantRS PRO
5,04 €
Each
Aantal stuks
Countersink 6.3mm 90° 3 HSS 45 mm 1 5 mm 35mm
RS-stocknr. 218-595
FabrikantRS PRO
14,58 €
Each
Aantal stuks
Countersink 12mm 90° 5 HSS - 1 - -
RS-stocknr. 215-495
FabrikantRS PRO
27,34 €
Each
Aantal stuks
Countersink 15mm 90° - HSS 65 mm 1 10 mm 37.5mm
RS-stocknr. 562-634
FabrikantRS PRO
10,70 €
Each
Aantal stuks
Countersink 6mm 90° 5 HSS 45 mm 1 5 mm 35mm
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