Hertel 336-004080 Countersink 5/16 in 100 Deg 6 Flute Carbide

Product Description

The HERTEL 336-004080 is a solid carbide countersink designed for producing clean, accurate chamfered holes in a wide range of materials. With a 5/16-inch head diameter and a 100-degree included angle, it generates consistent seat geometry for flat-head fasteners and deburring applications. The 6-flute configuration promotes smooth cutting action and reduces chatter, making it well-suited for both production and maintenance environments. The straight cylindrical shank measures 1/4 inch in diameter, allowing it to seat securely in standard drill chucks and collet holders. Machinists, toolmakers, and maintenance technicians rely on solid carbide construction for its rigidity and resistance to wear in demanding cutting conditions.

This countersink is appropriate for use on machining centers, drill presses, and hand-held drilling equipment where a 1/4-inch shank tool can be secured. It is suited for countersinking operations in steel, aluminum, plastics, and composite materials encountered in general metalworking, fabrication, and precision machining work. The 100-degree included angle matches the seating geometry required by many metric and unified flat-head fastener standards, making it a practical choice for shops handling mixed fastener specifications across production or repair tasks.

Key Features

• Solid carbide construction provides superior wear resistance compared to high-speed steel alternatives
• 5/16-inch head diameter suitable for countersinking standard flat-head fastener hole sizes
• 100-degree included angle matches common flat-head fastener seating requirements
• 6-flute design reduces chatter and promotes a smooth, consistent finish
• 1/4-inch straight cylindrical shank fits standard chucks and collet holders

Compatibility

Designed as a replacement or production countersink for use in any machine tool or drill press capable of accepting a 1/4-inch straight cylindrical shank cutting tool.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool from the chuck or collet holder. Verify shank seating and runout before beginning a cut, as excessive runout will reduce tool life and surface finish quality. Follow applicable shop safety standards and machine manufacturer guidelines when setting speeds and feeds for carbide tooling.