Value Collection GH8862203 Solid Pilot Counterbore

Product Description

The VALUE COLLECTION GH8862203 is a solid pilot counterbore designed for precision counterboring operations in metalworking and machining applications. Built from high speed steel, this tool delivers the hardness and wear resistance needed for production drilling environments. The counterbore measures 1/2 inch in diameter with a 7/16 inch straight-cylindrical shank and an 11/32 inch standard pilot. Three flutes provide clean material removal and chip evacuation. This type of tool is typically installed in drill presses, milling machines, or hand-held setups where a flat-bottomed recess is required for fastener seating. It is compatible with 5/16 inch fasteners and is sold as a single unit.

This counterbore is suited for use in machine shops, fabrication facilities, and maintenance environments where standard-sized counterbores are required for bolt or screw head recessing. The forward cutting direction and straight-cylindrical shank make it straightforward to chuck in conventional toolholders. It is appropriate for machinists, tool and die technicians, and maintenance mechanics working with steel and similar materials. The standard pilot style ensures accurate alignment during the counterboring operation without requiring a separate pilot pin.

Key Features

• High speed steel construction for hardness and extended tool life in metal cutting
• 1/2 inch counterbore diameter sized for 5/16 inch fastener compatibility
• 11/32 inch standard pilot for accurate bore alignment
• 7/16 inch straight-cylindrical shank for secure chuck or collet holding
• 3-flute geometry promotes efficient chip evacuation and clean finish
• Forward cutting direction for use in standard drill press and milling setups

Compatibility

Designed as a standard solid pilot counterbore compatible with 5/16 inch fasteners, suitable for use in drill presses, milling machines, and similar equipment accepting a 7/16 inch straight-cylindrical shank.

Installation Notes

This tool is installed and operated by machinists or maintenance mechanics using a drill press, milling machine, or compatible rotary tool. Secure the 7/16 inch shank firmly in a chuck or collet before operation and ensure the workpiece is clamped to prevent movement. Always power down the machine completely before changing or adjusting tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and improve cut quality.