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. 666-7404
FabrikantnummerG1366.3
FabrikantDormer
17,75 €
Each
Aantal stuks
Countersink 6.3mm 90° 3 HSS 45 mm 1 5 mm -
RS-stocknr. 499-413
Fabrikantnummer4405720
FabrikantEXACT
24,11 €
Each
Aantal stuks
Countersink 20.5mm 90° 3 HSS-E 63 mm 1 10 mm -
RS-stocknr. 673-8704
FabrikantRS PRO
7,07 €
Each
Aantal stuks
Countersink 10.4mm 90° 3 HSS 50 mm 1 6 mm 36mm
RS-stocknr. 215-473
FabrikantRS PRO
12,24 €
Each
Aantal stuks
Countersink 5mm 90° - HSS 45 mm 1 6 mm 45mm
RS-stocknr. 136-3945
FabrikantnummerG10720.5
FabrikantDormer
110,11 €
Each
Aantal stuks
Countersink 20.5mm 90° 3 HSS-E 50 mm 1 6.35 mm -
RS-stocknr. 812-6024
FabrikantnummerG5708.3
FabrikantDormer
43,47 €
Each
Aantal stuks
Countersink 8.3mm 90° 3 HSS 50 mm 1 6 mm -
RS-stocknr. 136-3941
FabrikantnummerG10710.4
FabrikantDormer
58,81 €
Each
Aantal stuks
Countersink 10.4mm 90° 3 HSS-E 50 mm 1 6.35 mm -
RS-stocknr. 499-403
Fabrikantnummer4405718
FabrikantEXACT
16,38 €
Each
Aantal stuks
Countersink 16.5mm 90° 3 HSS-E 60 mm 1 10 mm -
RS-stocknr. 508-8998
Fabrikantnummer05646
FabrikantEXACT
7,80 €
Each
Aantal stuks
Countersink 20.5mm 90° 3 HSS 41 mm 1 1/4 in -
RS-stocknr. 423-832
FabrikantRS PRO
13,85 €
Each
Aantal stuks
Countersink 10.4mm 90° 5 HSS 31 mm 1 7.15 mm 21.5mm
RS-stocknr. 812-6021
FabrikantnummerG5706.3
FabrikantDormer
41,37 €
Each
Aantal stuks
Countersink 6.3mm 90° 3 HSS 45 mm 1 5 mm -
RS-stocknr. 423-826
FabrikantRS PRO
13,29 €
Each
Aantal stuks
Countersink 16.5mm 90° 3 HSS 40 mm 1 7.15 mm 21.5mm
RS-stocknr. 218-573
FabrikantRS PRO
24,03 €
Each
Aantal stuks
Countersink 20mm 90° 5 HSS - 1 - -
RS-stocknr. 423-816
FabrikantRS PRO
8,99 €
Each
Aantal stuks
Countersink 12.4mm 90° 3 HSS 36 mm 1 7.15 mm 21.5mm
RS-stocknr. 499-396
Fabrikantnummer4405713
FabrikantEXACT
12,64 €
Each
Aantal stuks
Countersink 10.4mm 90° 3 HSS-E 50 mm 1 6 mm -
RS-stocknr. 218-630
FabrikantRS PRO
26,50 €
Each
Aantal stuks
Countersink 20mm 90° 3 HSS - 1 - -
RS-stocknr. 423-850
FabrikantRS PRO
32,44 €
Each
Aantal stuks
Countersink 21mm 90° - HSS 65 mm 1 7.15 mm 20mm
RS-stocknr. 508-8960
Fabrikantnummer05422
FabrikantEXACT
10,37 €
Each
Aantal stuks
Countersink 14mm 90° - HSS-E 48 mm 1 - -
RS-stocknr. 136-3943
FabrikantnummerG10712.4
FabrikantDormer
66,22 €
Each
Aantal stuks
Countersink 12.4mm 90° 3 HSS-E 50 mm 1 6.35 mm -
RS-stocknr. 508-9008
Fabrikantnummer05645
FabrikantEXACT
11,22 €
Each
Aantal stuks
Countersink 16.5mm 90° 3 HSS 40 mm 1 1/4 in -