Hertel 334-203080 Carbide Countersink 1/4 in 4 Flute

Product Description

The HERTEL 334-203080 is a solid carbide countersink designed for precise chamfering and countersinking operations in metal, composite, and hard material applications. With a 1/4 inch head diameter and a 100-degree included angle, it produces clean, accurate seat profiles for flathead fasteners. The four-flute geometry improves chip evacuation and surface finish compared to single- or two-flute designs. The straight cylindrical 1/4 inch shank provides a secure grip in standard collets and chucks. Machinists and toolroom technicians install this countersink in CNC machining centers, manual mills, and drill presses.

This countersink is suited for production and maintenance machining environments where consistent chamfer geometry is required. The 100-degree included angle matches common aerospace and industrial fastener seat specifications. The carbide construction handles harder workpiece materials that would quickly wear high-speed steel tooling. Typical applications include deburring drilled holes, preparing fastener seats in aluminum, steel, and stainless substrates, and chamfering edges on machined components.

Key Features

• 1/4 inch head diameter for small-diameter hole chamfering
• 100-degree included angle matches standard flathead fastener seat geometry
• 4-flute design improves chip flow and surface finish quality
• Solid carbide construction for extended tool life in hard and abrasive materials
• Straight cylindrical 1/4 inch shank fits standard collets and chucks without adapters

Compatibility

Designed as a standard straight-shank countersink compatible with any drill press, manual milling machine, or CNC machining center equipped with a collet or chuck that accepts a 1/4 inch cylindrical shank.

Installation Notes

Install and remove this countersink only with the machine spindle fully stopped and the power source locked out or de-energized. Secure the shank firmly in a properly sized collet or Jacobs chuck before operation. Use appropriate cutting fluid or coolant for the workpiece material to maintain tool life and surface finish. Follow applicable shop safety standards and machine manufacturer guidelines for tooling installation and operating speeds.