Hertel 18256 Countersink 3/16 in Hss 1 Flute 100 Degree

Product Description

The HERTEL 18256 is a single-flute countersink designed for creating clean, conical seat profiles in metal and other materials prior to fastener installation. Built from high speed steel, this tool delivers consistent cutting performance across ferrous and non-ferrous workpieces. The 100-degree included angle suits standard flat-head fastener applications, and the 3/16-inch head diameter makes it well-suited for fine work and tight clearance areas. Machinists, tool-and-die workers, and maintenance technicians use this type of countersink in drill press, lathe, and hand-drill applications where controlled chamfering is required.

This countersink is appropriate for light-duty production and repair operations in metalworking shops, maintenance facilities, and fabrication environments. The straight cylindrical shank accepts standard drill chucks without the need for specialized tooling holders. The single-flute geometry reduces chatter on softer materials and provides a smooth finish in aluminum, brass, mild steel, and similar workpieces. It is sold individually and is suited for both bench-top and portable drill applications.

Key Features

• 3/16-inch head diameter for fine countersinking in confined areas
• 100-degree included angle matches standard flat-head fastener seat geometry
• Single-flute design minimizes chatter and promotes clean surface finish
• High speed steel construction provides durability across common metalworking applications
• Straight cylindrical shank fits standard drill chucks without adapters
• 3/16-inch shank diameter matches head diameter for consistent tool balance

Compatibility

Designed as an OEM-style replacement or direct-use countersink tool compatible with standard drill chucks accepting straight cylindrical shanks in the 3/16-inch diameter range.

Installation Notes

This countersink is installed and operated by machinists or maintenance technicians using a drill press, lathe tailstock, or handheld drill. Secure the straight cylindrical shank firmly in the chuck before use and ensure the workpiece is clamped or fixtured to prevent movement. Apply cutting fluid when working with ferrous metals to extend tool life and improve finish quality. Inspect the cutting edge before each use and replace the tool if chipping or dulling is observed.