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 456-898
BrandRS PRO
TWD257.00
單位
12mm - 3 HSS 120 mm - -
RS庫存編號 456-905
BrandRS PRO
TWD508.00
單位
25mm 90° 3 HSS 145 mm - -
RS庫存編號 508-8960
製造零件編號05422
BrandEXACT
TWD391.00
單位
14mm 90° - HSS-E 48 mm - -
RS庫存編號 508-8976
製造零件編號05421
BrandEXACT
TWD314.00
單位
10mm 90° - HSS-E 45 mm - -
RS庫存編號 136-3945
製造零件編號G10720.5
BrandDormer
TWD4,616.00
單位
20.5mm 90° 3 HSS-E 50 mm 6.35 mm -
RS庫存編號 218-551
BrandRS PRO
TWD184.00
單位
6mm 90° 3 HSS - - -
RS庫存編號 508-9064
製造零件編號05520
BrandEXACT
TWD514.00
單位
20.5mm 90° 3 HSS 63 mm 10 mm -
RS庫存編號 666-7404
製造零件編號G1366.3
BrandDormer
TWD660.00
單位
6.3mm 90° 3 HSS 45 mm 5 mm -
RS庫存編號 136-3950
製造零件編號G10616.5
BrandDormer
TWD1,647.00
單位
16.5mm 90° 3 HSS 60 mm 10 mm -
RS庫存編號 136-8107
BrandNoga
TWD907.00
單位
1 → 10.4mm 90° - HSS - - -
RS庫存編號 218-668
BrandRS PRO
TWD222.00
單位
10mm 90° 3 HSS - - -
RS庫存編號 218-595
BrandRS PRO
TWD250.00
單位
12mm 90° 5 HSS - - -
RS庫存編號 218-652
BrandRS PRO
TWD287.00
單位
12mm 90° 3 HSS - - -
RS庫存編號 508-9008
製造零件編號05645
BrandEXACT
TWD382.00
單位
16.5mm 90° 3 HSS 40 mm 1/4 in -
RS庫存編號 218-573
BrandRS PRO
TWD370.00
單位
20mm 90° 5 HSS - - -
RS庫存編號 136-3946
製造零件編號G1066.3
BrandDormer
TWD964.00
單位
6.3mm 90° 3 HSS 45 mm 5 mm -
RS庫存編號 508-9020
製造零件編號05643
BrandEXACT
TWD296.00
單位
10.4mm 90° 3 HSS 34 mm 1/4 in -
RS庫存編號 509-0036
製造零件編號05510
BrandEXACT
TWD237.00
單位
8.3mm 90° 3 HSS 50 mm 6 mm -
RS庫存編號 499-384
製造零件編號4405706
BrandEXACT
TWD355.00
單位
6.3mm 90° 3 HSS-E 45 mm 5 mm -
RS庫存編號 423-848
BrandRS PRO
TWD209.00
單位
14mm 90° - HSS 48 mm 7.15 mm 20mm