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 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
  1. 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 on centre.
  2. 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 using 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 centering 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

Materials
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 Head Diameter Countersink Angle Number of Flutes Material Overall Length Shank Diameter Shank Length
RS庫存編號 508-8932
製造零件編號05642
BrandEXACT
HK$76.83
單位
8.3mm 90° 3 HSS 31 mm 1/4 in -
RS庫存編號 218-551
BrandRS PRO
HK$66.98
單位
6mm 90° 3 HSS - - -
RS庫存編號 218-668
BrandRS PRO
HK$96.31
單位
10mm 90° 3 HSS - - -
RS庫存編號 215-473
BrandRS PRO
HK$83.66
單位
5mm 90° - HSS 45 mm 6 mm 45mm
RS庫存編號 673-8717
BrandRS PRO
HK$135.40
單位
16.5mm 90° 3 HSS 63 mm 10 mm 42mm
RS庫存編號 218-652
BrandRS PRO
HK$85.30
單位
12mm 90° 3 HSS - - -
RS庫存編號 673-8710
BrandRS PRO
HK$130.54
單位
20.5mm 90° 3 HSS 63 mm 10 mm 42mm
RS庫存編號 218-573
BrandRS PRO
HK$130.32
單位
20mm 90° 5 HSS - - -
RS庫存編號 509-0008
製造零件編號05522
BrandEXACT
HK$167.04
單位
25mm 90° 3 HSS 67 mm 10 mm -
RS庫存編號 423-822
BrandRS PRO
HK$137.87
單位
20.5mm 90° 3 HSS 43 mm 7.15 mm 21.5mm
RS庫存編號 508-9092
製造零件編號05644
BrandEXACT
HK$97.60
單位
12.4mm 90° 3 HSS 35 mm 1/4 in -
RS庫存編號 509-0036
製造零件編號05510
BrandEXACT
HK$60.92
單位
8.3mm 90° 3 HSS 50 mm 6 mm -
RS庫存編號 218-589
BrandRS PRO
HK$109.08
單位
16mm 90° 5 HSS - - -
RS庫存編號 136-3948
製造零件編號G10610.4
BrandDormer
HK$291.49
單位
10.4mm 90° 3 HSS 50 mm 6 mm -
RS庫存編號 666-7410
製造零件編號G13610.4
BrandDormer
HK$202.96
單位
10.4mm 90° 3 HSS 50 mm 6 mm -
RS庫存編號 812-6024
製造零件編號G5708.3
BrandDormer
HK$358.41
單位
8.3mm 90° 3 HSS 50 mm 6 mm -
RS庫存編號 423-832
BrandRS PRO
HK$84.81
單位
10.4mm 90° 5 HSS 31 mm 7.15 mm 21.5mm
RS庫存編號 508-9042
製造零件編號05641
BrandEXACT
HK$76.83
單位
6.3mm 90° 3 HSS 31 mm 1/4 in -
RS庫存編號 666-7426
製造零件編號G13620.5
BrandDormer
HK$381.89
單位
20.5mm 90° 3 HSS 63 mm 10 mm -
RS庫存編號 136-3939
製造零件編號G1076.3
BrandDormer
HK$531.54
單位
6.3mm 90° 3 HSS-E 50 mm 6.35 mm -