Hertel 334-205090 Carbide Countersink 3/8 in 110 Deg 4 Flute

Product Description

The HERTEL 334-205090 is a solid carbide countersink designed for producing clean, accurate countersunk holes in a wide range of workpiece materials. The tool features a 3/8 inch head diameter and a 110-degree included angle, which suits fastener seating applications where a wider-angle profile is required. Four cutting flutes deliver smooth cutting action and reduce chatter during operation. The straight cylindrical shank measures 3/8 inch in diameter, providing a secure, concentric grip in standard drill chucks and collet holders. Carbide construction offers superior hardness and wear resistance compared to high-speed steel, extending tool life in production and job-shop environments.

This countersink is suited for metalworking, fabrication, and machining applications where precise fastener recesses are required. The 110-degree included angle accommodates specific fastener head profiles used in aerospace, structural, and general manufacturing work. It is appropriate for use in CNC machining centers, drill presses, and handheld power tools equipped with compatible straight-shank toolholding. Machinists, toolmakers, and fabricators working in metal cutting environments are the primary users of this tool.

Key Features

• 3/8 inch head diameter for compact countersinking in tight or standard clearances
• 110-degree included angle for specialized fastener seating profiles
• 4 flutes for smooth, chatter-resistant cutting action
• Solid carbide construction for extended wear life and hardness
• 3/8 inch straight cylindrical shank compatible with standard drill chucks and collet holders

Compatibility

Designed as a direct-fit countersinking tool for use with standard straight-shank drill chucks and collet toolholding systems accepting a 3/8 inch shank diameter.

Installation Notes

Installation is performed by machinists or toolmakers in machine shop environments. Secure the straight shank firmly in a collet or drill chuck before operation, and verify runout is within acceptable tolerance for the application. Follow all applicable machine guarding and personal protective equipment requirements per shop safety standards. Power down and de-energize the machine spindle completely before changing or adjusting the tool.