Hertel 18773 Countersink 1/2 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18773 is a 4-flute high speed steel countersink designed for creating clean, accurately angled seat profiles in metal and other materials. With a 1/2-inch head diameter and an 82-degree included angle, this tool produces the conical recess required for flat-head fasteners to sit flush with or below a workpiece surface. The straight cylindrical shank measures 1/2 inch in diameter, making it compatible with standard drill chucks and collet holders. Machinists and metalworking professionals use this countersink for production and maintenance applications where precise countersinking is required.

This countersink suits a range of general metalworking operations including drilling and finishing operations on steel, aluminum, and similar materials. The 82-degree included angle corresponds to the standard angle for flat-head machine screws used in North American fastener applications. It is appropriate for use in manual drill presses, CNC machining centers, and hand-held power tools equipped with a compatible chuck. The 4-flute geometry helps reduce chatter and produces a smoother finish compared to single-flute alternatives.

Key Features

• 82-degree included angle matches standard flat-head fastener geometry for flush seating
• 4-flute design reduces chatter and improves surface finish quality
• High speed steel construction provides durability across a range of workpiece materials
• 1/2-inch straight cylindrical shank fits standard drill chucks and collet holders
• 1/2-inch head diameter suits common countersinking tasks in production and maintenance settings

Compatibility

Designed as an OEM-style countersink for use with standard drill presses, CNC machining centers, and power tools equipped with a 1/2-inch or larger capacity chuck accepting a straight cylindrical shank.

Installation Notes

This tool is intended for use by machinists and metalworking professionals familiar with cutting tool operation. Secure the straight shank firmly in the chuck or collet before operation and verify that the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting speeds for the workpiece material and apply cutting fluid where recommended to extend tool life. Inspect the cutting edges before each use and remove the tool from service if chipping or wear is detected.