Hertel 331-206100 Carbide Countersink 1/2 Inch 120 Degree

Product Description

The HERTEL 331-206100 is a single-flute carbide countersink designed for producing clean, accurate countersunk holes in metalworking and machining applications. It features a 120-degree included angle and a 1/2-inch head diameter, making it well-suited for aerospace-standard fastener seating and general metalworking where a wide-angle countersink is required. The straight cylindrical shank measures 1/2 inch in diameter for secure chuck retention. Carbide construction provides superior hardness and wear resistance compared to high-speed steel, extending tool life in production environments. This tool is typically installed by machinists and tool-and-die professionals working on CNC machining centers or manual mills and drill presses.

This countersink is used in machining operations that require precise fastener seat preparation, deburring, or chamfering of drilled holes. The 120-degree included angle is standard for applications requiring a flatter, wider seat geometry, commonly encountered in aerospace and precision sheet metal work. The single-flute design reduces chatter and produces a smooth, accurate finish on the countersunk surface. Suitable for use in ferrous and non-ferrous metals where carbide tooling is preferred for hardness and long tool life.

Key Features

• Carbide construction for superior wear resistance and extended tool life in metalworking applications
• 120-degree included angle provides a wide-angle seat geometry suited for aerospace and precision fastener applications
• Single-flute design minimizes chatter and produces a smooth, accurate countersunk finish
• 1/2-inch head diameter for standard-sized countersink operations
• Straight cylindrical shank at 1/2 inch diameter ensures secure retention in standard drill chucks and collets

Compatibility

Designed as an OEM-style replacement or direct-use carbide countersink compatible with standard 1/2-inch straight-shank chuck and collet systems on drill presses, manual mills, and CNC machining centers.

Installation Notes

Installation and use of this countersink should be performed by qualified machinists familiar with cutting tool safety. Secure the straight cylindrical shank firmly in a properly sized collet or drill chuck before operation, and verify runout is within acceptable tolerance before engaging the workpiece. Always power down and lock out the machine spindle before changing or inspecting cutting tools. Do not exceed the recommended spindle speed range for carbide tooling in the material being machined.