Dormer G136 HSS Straight Shank Countersink Bits 90 Degree Single Pack

This cone countersink drill bit is designed to create conical seats for metric ISO countersunk screws. Made from high-speed steel (HSS) with a standard uncoated finish, it features a 90° cutting angle and a 10 mm shank to fit common drill chucks. The tool is suitable for various materials, including carbon steel, steel alloys, copper, and copper alloys. It has a 25.00 mm maximum diameter, a total length of 67 mm, and a head length of 15.5 mm. The bit is described as 3-flute and bright finished, suitable for use in drills and milling machines capable of handling HSS tools, and can also be used for deburring when appropriate. It is compatible with standard 10 mm shank chucks and is intended for fastening applications requiring a 90° countersink. This versatile tool supports both machine and hand-held applications, with a design that accommodates large-diameter countersinks in standard holders and chucks.

Technical specifications

• Max diameter: 25.00 mm
• Total length: 67 mm
• Head length: 15.5 mm
• Shank diameter: 10 mm
• Cutting angle: 90°
• Material: HSS, uncoated
• Flutes: 3

Usage

Designed to chamfer holes to accommodate standard fasteners with 90° heads. Suitable for use in drills and milling machines with 10 mm shank tools. Insert the shank into the drill chuck and tighten securely, ensuring the drill operates at an appropriate speed for the material. The bit can also be used as a deburring tool in appropriate applications. Bright finish helps prevent material sticking to the cutting edge.