Hertel 331-207070 Countersink 5/8 in 90 Degree 1 Flute Carbide

Product Description

The HERTEL 331-207070 is a single-flute carbide countersink designed for producing clean, accurate countersunk holes in a wide range of materials. With a 5/8-inch head diameter and a 90-degree included angle, it delivers consistent seat geometry for flathead fasteners. The straight cylindrical shank measures 5/8 inch, making it compatible with standard drill chucks and tool holders. Carbide construction provides hardness and wear resistance well beyond high-speed steel, supporting use on harder workpiece materials and in higher-duty applications. This countersink is used by machinists, tool and die specialists, and production shop personnel.

This countersink suits applications where a 90-degree included angle is required for flathead machine screws and similar fasteners. The single-flute design reduces chatter and produces a smooth finish, making it a practical choice for precision work in metal fabrication, aerospace component prep, and general machining environments. It is appropriate for use in CNC machining centers, manual mills, and drill press setups where controlled feed rates can be maintained.

Key Features

• 5/8-inch head diameter produces a consistent countersink seat for flathead fasteners
• 90-degree included angle matches standard flathead machine screw geometry
• Single-flute design minimizes chatter and improves surface finish quality
• Carbide construction delivers superior hardness and extended tool life versus high-speed steel
• Straight cylindrical shank fits standard drill chucks and collet tool holders

Compatibility

Designed as a standard single-flute carbide countersink with a straight cylindrical shank, suitable for use in drill chucks, ER collet holders, and other 5/8-inch round-shank tool holding systems on manual and CNC machine tools.

Installation Notes

Installation and use should be performed by qualified machinists or tooling personnel familiar with cutting tool setup. Secure the shank firmly in the tool holder before operation and confirm runout is within acceptable limits. Use appropriate cutting speeds and feed rates for the workpiece material and always wear proper eye protection. Inspect the cutting edge for chips or wear before each use, as carbide tooling can fracture if run under improper conditions.