Value Collection GH8830481 Counterbore 0.75in 4 Flute Hss

Product Description

The VALUE COLLECTION GH8830481 is an interchangeable pilot counterbore designed for precision seat-cutting and bolt-head recess work in metal fabrication and aerospace-style applications. Built from high-speed steel (HSS) with a bright, uncoated polished finish, this tool delivers clean, accurate cuts in ferrous and non-ferrous materials. It features a 0.75 inch counterbore diameter, a 0.5 inch straight shank for secure chuck engagement, and a 4-flute geometry that balances chip evacuation with surface finish quality. Overall length is 5.375 inches. The interchangeable pilot design allows a single body to accept different pilot sizes, making this a flexible option for shops and field machinists who service multiple bore sizes.

This counterbore is suited for aircraft-style applications and general-purpose metalworking where consistent counterbore depth and concentricity are required. It is a standard choice for machinists, tool and die makers, and aviation maintenance technicians working with structural fastener installations. The 0.1875 inch pilot shank diameter compatibility allows use with a matching interchangeable pilot. Right-hand cutting direction makes it compatible with standard drill press and milling machine spindle rotation. Sold as a single unit, it fits into both production environments and low-volume repair or fabrication workflows.

Key Features

• 0.75 inch counterbore diameter for precise bolt-head and fastener seat recessing
• High-speed steel construction provides durability in ferrous and non-ferrous materials
• 4-flute design promotes smooth chip removal and improved surface finish
• Interchangeable pilot system accepts 0.1875 inch pilot shank for flexible use across bore sizes
• 0.5 inch straight shank fits standard drill chucks and milling collets
• Aircraft-style geometry meets demanding aerospace and structural fabrication requirements

Compatibility

Designed for use with interchangeable pilots with a 0.1875 inch pilot shank diameter. Suitable for standard drill press, CNC milling, and manual milling machine spindles accepting a 0.5 inch straight shank. Intended for aircraft-style counterboring applications in metalworking environments.

Installation Notes

This tool is installed and operated by machinists and metalworking technicians using drill presses, mills, or similar machine tools. Secure the straight shank firmly in a chuck or collet rated for the spindle speed being used, and confirm the correct interchangeable pilot is seated before beginning the cut. Always power down the machine completely before changing pilots or removing the tool from the spindle. Do not exceed the recommended cutting speed for the workpiece material and tool diameter.