Hertel 336-204060 Countersink 5/16 in 82 Degree 6 Flute Carbide

Product Description

The HERTEL 336-204060 is a solid carbide countersink designed for precision chamfering and countersinking operations in metalworking and machining applications. With a 5/16-inch head diameter and an 82-degree included angle, this tool produces clean, accurate countersunk seats for flathead fasteners. The 6-flute configuration distributes cutting load evenly across the tool, reducing chatter and improving surface finish at the entry point. The straight-cylindrical shank measures 5/16 inches in diameter, providing secure clamping in standard collets or drill chucks. This countersink is suited for machinists, tool-and-die technicians, and precision fabricators working on close-tolerance assemblies.

This countersink is appropriate for use in machine shop environments, job shops, and production lines where consistent countersink geometry is required. The 82-degree angle matches the seating profile of flathead machine screws commonly specified in aerospace and general machining standards. It is intended for use in drill presses, CNC machining centers, and manual milling machines. The carbide construction allows it to perform in harder workpiece materials where high-speed steel tooling would wear prematurely.

Key Features

• 5/16-inch head diameter for compact countersinking in tight clearance areas
• 82-degree included angle matches standard flathead fastener seating geometry
• 6-flute design reduces chatter and improves entry surface finish
• Solid carbide construction for extended tool life in harder materials
• Straight-cylindrical shank fits standard collets and drill chucks
• 5/16-inch shank diameter for consistent, rigid clamping

Compatibility

Designed as an OEM-style replacement or direct-use countersink for machine shop and production applications requiring an 82-degree, 6-flute carbide countersink with a 5/16-inch head diameter and straight-cylindrical shank.

Installation Notes

This tool should be installed and operated by qualified machinists familiar with rotating cutting tool procedures. Secure the straight-cylindrical shank firmly in the collet or chuck to the full depth of the shank before operation. Ensure the spindle is fully stopped and the machine is de-energized before tool changes. Do not exceed the recommended RPM range for carbide tooling in the workpiece material being machined.