Value Collection GH8815367 Pilot Counterbore 9/16in Cobalt

Product Description

The VALUE COLLECTION GH8815367 is a three-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from cobalt steel, this tool delivers the heat and wear resistance needed when working with harder ferrous materials and high-speed cutting environments. The 9/16 inch counterbore diameter is paired with a 1/2 inch straight shank, providing secure tool holder engagement. With a bright, uncoated finish and right-hand cutting direction, the GH8815367 is a standard workhorse for machinists and tool-and-die professionals who need reliable, repeatable counterbore geometry without special coatings.

This counterbore is suited for use in manual mills, drill presses, and CNC machining centers where a straight shank setup is preferred. It is applicable in aerospace-adjacent, industrial, and general metalworking environments requiring a clean counterbore seat for socket head cap screws or similar fasteners. The interchangeable pilot design allows the tool body to be reused with different pilot sizes, increasing versatility across multiple bore applications on a single workpiece or job lot.

Key Features

• 9/16 inch counterbore diameter for consistent seat geometry
• 1/2 inch straight shank for broad machine and collet compatibility
• Cobalt steel construction for improved heat and wear resistance over standard HSS
• Three-flute design balances chip evacuation and surface finish quality
• Interchangeable pilot accepts 3/16 inch pilot shank diameter
• Bright uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as an OEM-style replacement and standard fitment interchangeable pilot counterbore for use in straight-shank tool holders and collet chucks accepting a 1/2 inch shank diameter.

Installation Notes

Installation and use of this counterbore should be performed by qualified machinists or tool operators familiar with rotary cutting tool safety. Ensure the machine spindle is fully powered down and locked out before inserting or removing the tool from the holder. Confirm the pilot is properly seated and secured before beginning the cut. Follow applicable shop safety standards and manufacturer guidelines for cutting speed and feed rate based on workpiece material.