Hertel 334-204100 Carbide Countersink 5/16 in 120 Degree 4 Flutes

Product Description

The HERTEL 334-204100 is a solid carbide countersink designed for precision chamfering and deburring of drilled holes in metalworking and machining applications. With a 5/16 inch head diameter and a 120-degree included angle, this tool produces clean, consistent countersunk seats for flat-head fasteners and chamfered entries. The 4-flute geometry improves chip evacuation and surface finish quality compared to single-flute designs. The straight cylindrical shank measures 5/16 inch in diameter, making it compatible with standard drill press chucks and CNC tool holders. Machinists and tool-and-die professionals install this countersink in machine shop, production, and maintenance environments.

This countersink is suited for use in ferrous and non-ferrous materials where a 120-degree seat angle is required. The 120-degree included angle is commonly specified for countersinking flat-head machine screws and aerospace-style fastener holes. Its compact 5/16 inch head diameter makes it practical for work on smaller hole patterns and closer part geometries. It is appropriate for both manual drill press setups and CNC machining center applications where repeatability and finish quality are priorities.

Key Features

• Solid carbide construction for extended tool life in demanding materials
• 120-degree included angle for standard flat-head fastener countersinking
• 4-flute design improves chip flow and surface finish quality
• 5/16 inch head diameter suits smaller hole patterns and tight geometries
• Straight cylindrical shank fits standard chucks and CNC tool holders

Compatibility

Designed as an OEM-style countersink for use with standard drill press chucks, CNC machining centers, and hand-held power tools accepting a 5/16 inch straight cylindrical shank.

Installation Notes

Installation is performed by qualified machinists or tooling professionals. Secure the straight cylindrical shank firmly in the chuck or collet before operation and verify runout is within acceptable limits for the application. Power down the machine and lock out energy sources before changing or adjusting the tool. Do not exceed the recommended speed and feed rates for the workpiece material and tool diameter.