Value Collection GH8860322 Solid Pilot Counterbore

Product Description

The VALUE COLLECTION GH8860322 is a solid pilot counterbore designed for precision counterboring operations in metalworking and machining applications. Manufactured from high speed steel, this tool delivers consistent cutting performance with a forward cutting direction and a 2-flute geometry that promotes chip clearance and clean seat formation. The counterbore measures 25/32 inches in diameter with a standard 1/2-inch pilot diameter and a straight-cylindrical shank measuring 1/2 inch in diameter. Overall length is 5.25 inches. It is compatible with fillister-head screws, making it a practical addition to any machinist or tool crib setup.

This counterbore is suited for job shop, production, and maintenance machining environments where accurate fastener seat preparation is required. It is commonly used when installing fillister-head fasteners that demand a recessed, flat-bottomed bore. The straight-cylindrical shank is compatible with standard drill press chucks and milling machine setups. Typical users include machinists, toolmakers, and maintenance technicians working with ferrous and non-ferrous metals in industrial and commercial settings.

Key Features

• High speed steel construction for durability across a range of workpiece materials
• 25/32-inch counterbore diameter sized for fillister-head screw seating
• Standard 1/2-inch pilot diameter for accurate bore alignment
• 2-flute design promotes chip evacuation and clean cutting action
• Straight-cylindrical 1/2-inch shank fits standard chucks without adapters
• Forward cutting direction for use in conventional drill press and milling setups

Compatibility

Designed for use with fillister-head screws requiring a 25/32-inch counterbore seat. Standard pilot configuration is compatible with conventional drill press and milling machine chucks accepting a 1/2-inch straight shank.

Installation Notes

This tool is installed and operated by machinists or toolmakers using a drill press, milling machine, or similar machine tool. Secure the workpiece firmly before operation and confirm the spindle is fully stopped before changing or adjusting the tool. Use cutting fluid appropriate for the workpiece material to extend tool life and maintain cut quality. Follow all applicable shop safety protocols when operating rotating cutting tools.