Magafor 84483409520 Countersink 3/8 in 82 Degree Cobalt

Product Description

The MAGAFOR 84483409520 is a single-end cobalt steel countersink designed for deburring and chamfering drilled holes in ferrous and hard materials. It features an 82-degree included angle and a 3/8-inch head diameter, making it well suited for standard flat-head fastener seat preparation. The straight cylindrical shank measures 1/4 inch in diameter for direct chuck mounting. Right-hand cutting geometry is ground for clean, chatter-resistant entry. This tool is used by machinists, tool-and-die workers, and maintenance technicians working with drill presses, CNC machining centers, and hand-held power drills.

This countersink handles cutting diameters from 5/64 inch up to 3/8 inch, covering the full range needed for most standard machine screw and bolt hole preparations in that size class. It is appropriate for use in production and maintenance environments where cobalt-grade tooling is specified for harder workpiece materials or where longer tool life is required compared to standard high-speed steel alternatives. A single cutting end keeps the tool compact and easy to index in tight setups.

Key Features

• 82-degree included angle sized for standard flat-head fastener seating
• Cobalt steel construction for improved hardness and heat resistance over standard HSS
• Right-hand cutting direction with single-end geometry
• Cutting diameter range: 5/64 inch to 3/8 inch
• 1/4-inch straight cylindrical shank fits standard drill chucks and collets
• Head diameter: 3/8 inch (9.52 mm)

Compatibility

Designed as a direct-fit countersink for use with 1/4-inch straight-shank drill chucks, collet systems, and quick-change tool holders in drill press, lathe, or CNC applications requiring an 82-degree chamfer angle.

Installation Notes

Countersinks are installed and serviced by machinists and maintenance technicians. Secure the shank fully in the chuck or collet before operation and verify the workpiece is clamped. Use low spindle speeds and consistent feed pressure to prevent chatter and premature edge wear. Inspect the cutting edges before each use and replace the tool at first sign of dulling to maintain chamfer geometry.