Hertel 331-206070 Countersink 1/2 in 90 Deg 1 Flute Carbide

Product Description

The HERTEL 331-206070 is a single-flute carbide countersink designed for precise chamfering and deburring of drilled holes in metal, composites, and other hard materials. It features a 1/2 inch head diameter with a 90-degree included angle, making it suitable for standard flat-head fastener seat preparation. The straight cylindrical shank measures 1/2 inch in diameter for secure chuck or collet retention. Carbide construction provides superior hardness and wear resistance compared to high-speed steel, extending tool life in production or repetitive use environments. Machinists and tool-and-die professionals use this countersink in CNC machining centers, drill presses, and hand-held drilling equipment.

This countersink is suited for machine shops, fabrication facilities, and maintenance operations requiring consistent 90-degree chamfers on bolt-hole patterns and countersunk fastener seats. The single-flute geometry reduces chatter and produces a smooth, accurate seat finish in ferrous and non-ferrous metals. It is commonly installed in collet chucks or standard Jacobs-style drill chucks on vertical mills and drill presses, and it also runs effectively in CNC toolholders compatible with a 1/2 inch straight shank.

Key Features

• 1/2 inch head diameter for standard countersunk fastener seat prep
• 90-degree included angle matches flat-head screw and bolt specifications
• Single-flute carbide construction minimizes chatter and maximizes tool life
• 1/2 inch straight cylindrical shank fits standard chucks and collets
• Carbide substrate handles hard materials and high-cycle production runs

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any machine spindle, drill press chuck, or CNC toolholder accepting a 1/2 inch straight cylindrical shank countersink.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with cutting tool safety procedures. Ensure the machine spindle is fully stopped and de-energized before inserting or removing the tool from the chuck or collet holder. Secure the shank with adequate clamping force to prevent slippage during operation. Follow the machine manufacturer and tooling manufacturer guidelines for appropriate spindle speeds and feed rates for the workpiece material.