Value Collection GH8862088 Solid Pilot Counterbore 19/64 in

Product Description

The VALUE COLLECTION GH8862088 is a solid pilot counterbore designed for precise, clean counterbore operations in metalworking and mechanical assembly applications. Built from high speed steel, this tool delivers the hardness and edge retention needed for production drilling in steel, aluminum, and similar materials. It features a 19/64-inch counterbore diameter, an 11/64-inch pilot diameter, and a 1/4-inch straight cylindrical shank for secure chuck engagement. With 3 flutes and a forward cutting direction, it removes material efficiently while maintaining hole concentricity. Weighing just 0.06 pounds, it is a compact, single-piece tool suited for bench drill press and hand drill use.

This counterbore is sized for Number 8 fastener compatibility, making it a direct-fit tool for countersinking socket head cap screws, shoulder bolts, and similar hardware in light manufacturing, maintenance, and machine shop environments. The standard pilot design keeps the counterbore centered over the pilot hole, reducing drift and producing consistent seat geometry. It is appropriate for use on manual mills, drill presses, and portable drills where a 1/4-inch shank is accepted. Machinists, tool and die workers, and maintenance technicians will find this tool suited to repetitive counterbore work on ferrous and non-ferrous workpieces.

Key Features

• 19/64-inch counterbore diameter sized for Number 8 fastener seating
• 11/64-inch standard pilot diameter for accurate hole alignment
• 1/4-inch straight cylindrical shank fits common drill chucks
• 3-flute geometry for efficient chip evacuation and smooth cutting
• High speed steel construction for edge retention on steel and aluminum
• Forward cutting direction compatible with standard drill press rotation

Compatibility

Designed as an OEM-style replacement or direct addition for metalworking setups requiring a Number 8 fastener-compatible solid pilot counterbore with a 1/4-inch straight cylindrical shank.

Installation Notes

This tool is installed by machinists and maintenance technicians using a standard drill chuck on a bench drill press, mill, or portable drill. Secure the 1/4-inch shank firmly in the chuck before operation and ensure the workpiece is clamped to prevent rotation. Power down and de-energize the machine before changing or inspecting the tool. Use appropriate cutting fluid on harder ferrous materials to extend tool life and improve surface finish.