Hertel 18614 Countersink 5/16 in 120 Degree 4 Flute Hss

Product Description

The HERTEL 18614 is a 4-flute countersink designed for producing clean, accurate countersunk holes in a wide range of materials. Built from high speed steel, it features a 5/16-inch head diameter and a 120-degree included angle, making it well suited for deburring, chamfering, and seating flat-head fasteners flush with the workpiece surface. The 1/4-inch straight cylindrical shank provides secure clamping in standard drill chucks and collet holders. This tool is intended for use by machinists, fabricators, and trade professionals working with metal, plastic, or composite materials in production or maintenance environments.

The HERTEL 18614 fits typical bench drill press, hand drill, and milling machine setups where a compact countersink with a straight shank is required. It is appropriate for light to medium-duty countersinking operations in both shop and field settings. The 120-degree angle suits metric and standard flat-head fastener applications where a wider seat angle is specified.

Key Features

• 5/16-inch head diameter for compact countersinking in close-tolerance work
• 120-degree included angle for wide-seat flat-head fastener applications
• 4-flute design provides smooth cutting action and improved surface finish
• High speed steel construction for durability across metal and plastic substrates
• 1/4-inch straight cylindrical shank fits standard drill chucks and collet holders

Compatibility

Designed as a standard straight-shank countersink compatible with drill presses, hand drills, and milling machines accepting a 1/4-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists or fabricators using standard drill press or milling equipment. Secure the shank firmly in the chuck or collet before operation and ensure the workpiece is clamped to prevent movement. Use appropriate cutting fluid when working with ferrous metals to extend tool life and improve finish quality. Inspect the cutting edges before each use and replace the tool if chipping or excessive wear is present.