Value Collection GH8792327 Counterbore 2.5in 5 Flute Hss

Product Description

The VALUE COLLECTION GH8792327 is a 5-flute interchangeable pilot counterbore designed for precision recess boring in metalworking applications. Built from high speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in production and maintenance environments. The counterbore measures 2.5 inches in diameter with a 1.75-inch straight shank and an overall length of 9.875 inches. It accepts a 0.5-inch pilot shank and is ground for right-hand cutting direction. Licensed machinists, tool-and-die technicians, and maintenance mechanics are the primary users of this tool type.

This counterbore is suited for creating flat-bottomed recesses in ferrous and non-ferrous metals, including applications where fastener heads must sit flush or below the workpiece surface. The interchangeable pilot design allows a single body to be paired with different pilot sizes, reducing tooling inventory while maintaining consistent hole geometry. It is commonly used in job shops, aerospace maintenance facilities, and industrial manufacturing environments where tight tolerances on recess depth and diameter are required.

Key Features

• 2.5-inch counterbore diameter for large-diameter recess applications
• 5-flute geometry provides smooth chip evacuation and improved surface finish
• High speed steel construction offers toughness across a range of workpiece materials
• Bright, uncoated finish suitable for use with cutting fluids
• Interchangeable pilot accepts 0.5-inch pilot shank for flexible tooling setups
• 1.75-inch straight shank with 7.375-inch shank length for extended reach and rigid clamping

Compatibility

Designed for use with standard 0.5-inch interchangeable counterbore pilots. Verify pilot-to-body fit and shank-to-holder clearance before installation. No specific machine or system compatibility was provided in the product data.

Installation Notes

This tool is installed by machinists in milling machines, drill presses, or CNC machining centers equipped with a compatible straight-shank holder or collet chuck. Secure the 1.75-inch shank fully within the holder to the recommended grip depth before operation. Always bring the spindle to a complete stop before changing pilots or adjusting the tool. Use an appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.