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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Description Price Drill Bit Type Head Diameter Countersink Angle Number of Flutes Material Overall Length Number of Pieces Shank Diameter Shank Length
RS Stock No. 215-518
BrandRS PRO
kr 545,53
Each
Units
Countersink Set 2mm, 5mm, 10mm, 15mm, 20mm 90° - HSS - 4 - -
RS Stock No. 218-567
BrandRS PRO
kr 633,04
Each
Units
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 Stock No. 248-5576
BrandRS PRO
kr 803,83
Each
Units
Countersink Set 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm, 20.5 mm - - - - 6 - -
RS Stock No. 673-8697
BrandRS PRO
kr 732,00
Pr. 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 Stock No. 456-898
BrandRS PRO
kr 242,65
Each
Units
Countersink 12mm - 3 HSS 120 mm 1 - -
RS Stock No. 423-876
BrandRS PRO
kr 78,06
Each
Units
Countersink 6.3mm 90° 3 HSS 31 mm 1 7.15 mm 21.5mm
RS Stock No. 423-816
BrandRS PRO
kr 95,99
Each
Units
Countersink 12.4mm 90° 3 HSS 36 mm 1 7.15 mm 21.5mm
RS Stock No. 423-872
BrandRS PRO
kr 95,45
Each
Units
Countersink 8.3mm 90° 3 HSS 32 mm 1 7.15 mm 21.5mm
RS Stock No. 215-467
BrandRS PRO
kr 613,85
Each
Units
Countersink Set 2mm, 5mm, 10mm, 15mm, 20mm 90° - HSS - 4 - -
RS Stock No. 423-832
BrandRS PRO
kr 176,77
Each
Units
Countersink 10.4mm 90° 5 HSS 31 mm 1 7.15 mm 21.5mm
RS Stock No. 218-618
BrandRS PRO
kr 861,77
Each
Units
Countersink Set 6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm 90° 5 HSS - 6 - -
RS Stock No. 218-674
BrandRS PRO
kr 81,75
Each
Units
Countersink 8mm 90° 3 HSS - 1 - -
RS Stock No. 423-850
BrandRS PRO
kr 374,95
Each
Units
Countersink 21mm 90° - HSS 65 mm 1 7.15 mm 20mm
RS Stock No. 673-8717
BrandRS PRO
kr 179,28
Each
Units
Countersink 16.5mm 90° 3 HSS 63 mm 1 10 mm 42mm
RS Stock No. 215-489
BrandRS PRO
kr 165,78
Each
Units
Countersink 10mm 90° - HSS 48 mm 1 8 mm 30.5mm
RS Stock No. 562-533
BrandRS PRO
kr 134,15
Each
Units
Countersink 10mm 90° 5 HSS 39 mm 1 6.35 mm 20.5mm
RS Stock No. 673-8710
BrandRS PRO
kr 237,29
Each
Units
Countersink 20.5mm 90° 3 HSS 63 mm 1 10 mm 42mm
RS Stock No. 218-589
BrandRS PRO
kr 244,82
Each
Units
Countersink 16mm 90° 5 HSS - 1 - -
RS Stock No. 218-595
BrandRS PRO
kr 208,40
Each
Units
Countersink 12mm 90° 5 HSS - 1 - -
RS Stock No. 423-810
BrandRS PRO
kr 104,39
Each
Units
Countersink 10.4mm 90° 3 HSS 34 mm 1 7.15 mm 21.5mm