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 508-8819
製造零件編號05506
BrandEXACT
HK$50.10
單位
6.3mm 90° 3 HSS 45 mm 5 mm -
RS庫存編號 499-403
製造零件編號4405718
BrandEXACT
HK$149.28
單位
16.5mm 90° 3 HSS-E 60 mm 10 mm -
RS庫存編號 508-9799
製造零件編號05515
BrandEXACT
HK$79.61
單位
12.4mm 90° 3 HSS 56 mm 8 mm -
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 508-9020
製造零件編號05643
BrandEXACT
HK$71.87
單位
10.4mm 90° 3 HSS 34 mm 1/4 in -
RS庫存編號 508-8960
製造零件編號05422
BrandEXACT
HK$94.70
單位
14mm 90° - HSS-E 48 mm - -
RS庫存編號 499-390
製造零件編號4405710
BrandEXACT
HK$99.68
單位
8.3mm 90° 3 HSS-E 50 mm 6 mm -
RS庫存編號 508-8976
製造零件編號05421
BrandEXACT
HK$83.71
單位
10mm 90° - HSS-E 45 mm - -
RS庫存編號 508-9008
製造零件編號05645
BrandEXACT
HK$90.50
單位
16.5mm 90° 3 HSS 40 mm 1/4 in -
RS庫存編號 499-384
製造零件編號4405706
BrandEXACT
HK$73.09
單位
6.3mm 90° 3 HSS-E 45 mm 5 mm -
RS庫存編號 508-9070
製造零件編號05518
BrandEXACT
HK$94.83
單位
16.5mm 90° 3 HSS 60 mm 10 mm -
RS庫存編號 499-407
製造零件編號4405715
BrandEXACT
HK$117.13
單位
12.4mm 90° 3 HSS-E 56 mm 8 mm -
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 508-9193
製造零件編號05424
BrandEXACT
HK$306.52
單位
28mm 90° - HSS-E 84 mm - -
RS庫存編號 508-8954
製造零件編號05423
BrandEXACT
HK$150.14
單位
21mm 90° - HSS-E 65 mm - -
RS庫存編號 499-396
製造零件編號4405713
BrandEXACT
HK$122.52
單位
10.4mm 90° 3 HSS-E 50 mm 6 mm -
RS庫存編號 499-368
製造零件編號4405722
BrandEXACT
HK$289.32
單位
25mm 90° 3 HSS-E 67 mm 10 mm -
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 508-9064
製造零件編號05520
BrandEXACT
HK$133.60
單位
20.5mm 90° 3 HSS 63 mm 10 mm -
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 -