Hertel 18694 Countersink 1-1/2 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18694 is a high speed steel countersink designed for producing clean, accurate countersunk holes in a wide range of metalworking and fabrication applications. Built with a 1-1/2 inch head diameter and an 82-degree included angle, it creates the correct seat geometry for flat-head fasteners commonly used in structural and precision assembly work. The four-flute configuration promotes smooth cutting action and helps maintain concentricity during operation. The straight cylindrical shank measures 3/4 inch in diameter, allowing it to seat securely in standard drill chucks and machine tool holders.

This countersink is suited for use in machine shops, production environments, and maintenance facilities where consistent countersink depth and angle are required. It is typically run in drill presses, CNC machining centers, or manual milling machines. The 82-degree angle matches the standard for inch-series flat-head screws, making it a practical choice for general metal fabrication, sheet metal work, and precision hole preparation on ferrous and non-ferrous materials.

Key Features

• 1-1/2 inch head diameter for wide countersink coverage
• 82-degree included angle matches standard inch-series flat-head fastener geometry
• Four flutes for smooth, chatter-resistant cutting action
• High speed steel construction provides durability across a range of workpiece materials
• 3/4 inch straight cylindrical shank fits standard chucks and tool holders

Compatibility

Designed as a standard-geometry countersink for use in drill presses, CNC machining centers, and manual milling machines that accept a 3/4 inch straight cylindrical shank tooling.

Installation Notes

This tool is installed by machinists and fabricators in machine tool setups. Secure the shank fully in a drill chuck or collet before operation and verify runout is within acceptable limits for the application. Use appropriate cutting speeds and lubricants for the workpiece material to extend tool life and maintain surface finish quality. Never exceed the rated speed range for high speed steel tooling in the machine being used.