Value Collection GH8793002 Counterbore 3 Inch 5 Flute

Product Description

The VALUE COLLECTION GH8793002 is a 3-inch diameter interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining. Built from high-speed steel with a bright, uncoated finish, this tool accepts interchangeable pilots with a 1/2-inch pilot shank diameter compatibility, allowing one body to serve multiple hole sizes. The straight shank measures 1.75 inches in diameter and 7.375 inches in length, with an overall length of 9.875 inches. Five flutes provide smooth chip evacuation and a clean seat finish. Right-hand cutting direction suits standard drill press and milling machine spindles. Licensed machinists and tool-and-die tradespeople are the primary installers of this type of tooling.

This counterbore is suited for creating flat-bottomed recesses in ferrous and non-ferrous metals, allowing fastener heads to sit flush or below the workpiece surface. Typical applications include structural fabrication shops, maintenance and repair operations, and production machining environments where consistent counterbore geometry is required across multiple runs. The interchangeable pilot design makes it practical for shops that work with varied fastener head sizes without investing in multiple fixed-pilot tools.

Key Features

• 3-inch counterbore diameter for large-diameter fastener seating
• High-speed steel construction for durability across ferrous and non-ferrous workpieces
• 5-flute geometry for efficient chip removal and improved surface finish at the counterbore seat
• Interchangeable pilot system compatible with 1/2-inch pilot shank diameter
• Straight shank at 1.75 inches diameter suits standard toolholders and chucks
• Bright, uncoated finish - no heat-treat coating to interfere with re-sharpening
• Right-hand cutting direction for use with conventional spindle rotation

Compatibility

Designed as an OEM-style interchangeable pilot counterbore compatible with 1/2-inch pilot shank diameter pilots. Fits standard straight-shank toolholders and drill press chucks sized for a 1.75-inch shank diameter.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or tooling technician familiar with machine tool operation. Ensure the machine spindle is fully stopped and the tool is securely seated and locked in the toolholder before beginning any cut. Verify the correct pilot is installed and properly seated before engaging the workpiece. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection with large-diameter HSS counterbores.