Hertel 18525 Countersink 1/2 in 82 Degree 6 Flute Hss

Product Description

The HERTEL 18525 is a 6-flute countersink designed for deburring and chamfering operations in metal fabrication and machining applications. Built from high speed steel, it delivers consistent cutting performance across a range of ferrous and non-ferrous workpiece materials. The tool features a 1/2 inch head diameter and an 82-degree included angle, making it well suited for standard flat-head fastener seat preparation. The straight cylindrical shank measures 3/8 inch in diameter for direct chuck mounting. A tip diameter of 0.1090 inches allows for precise entry on pre-drilled holes. Licensed machinists, tool-and-die technicians, and maintenance tradespeople are the primary users of this tool.

This countersink is used in general metalworking environments where consistent chamfer geometry is required for flat-head screw seating, edge preparation, or hole deburring. It is appropriate for use in both manual drill press setups and CNC machining centers. The 82-degree angle matches the standard included angle for inch-series flat-head machine screws, making it a common choice for production and repair work in industrial, HVAC fabrication, and general trade shop settings.

Key Features

• 1/2 inch head diameter for standard chamfering and countersink seat preparation
• 82-degree included angle matches inch-series flat-head fastener geometry
• 6-flute design provides smooth cutting action and reduced chatter
• High speed steel construction offers durability across common metal substrates
• 3/8 inch straight cylindrical shank for direct chuck or collet mounting
• 0.1090 inch tip diameter for accurate entry on pre-drilled holes

Compatibility

Designed as a standard 6-flute countersink for use with drill presses, CNC machining centers, and hand-held electric drills equipped with a 3/8 inch or larger chuck capacity.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or trained tradesperson. Secure the workpiece firmly before operation and confirm the chuck or collet is properly tightened before engaging the spindle. Operate at appropriate spindle speeds for the workpiece material to prevent tool wear or workpiece damage. Always wear appropriate personal protective equipment including eye protection when using rotary cutting tools.