Value Collection GH8790131 Counterbore 13/64 in 3 Flute Hss

Product Description

The VALUE COLLECTION GH8790131 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in a right-hand cutting direction. The 13/64-inch counterbore diameter pairs with a 15/64-inch straight shank, and the tool accepts a 3/32-inch pilot shank for accurate hole alignment. At 3 inches overall length with a 2-3/8-inch shank length, it fits standard drill press and milling machine setups used by machinists and toolroom professionals.

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. It is commonly used in general machining, aerospace-adjacent maintenance work, and production environments where consistent counterbore depth and diameter are required. The interchangeable pilot design allows the pilot to be swapped without replacing the full tool body, reducing tooling cost over time.

Key Features

• 13/64-inch counterbore diameter for precise recess cutting
• 3-flute geometry provides smooth chip evacuation and stable cutting action
• High speed steel construction handles general-purpose metal cutting demands
• Straight 15/64-inch shank for secure chuck or collet grip
• Interchangeable 3/32-inch pilot shank for flexible reuse across jobs
• Bright, uncoated finish suited for use with cutting fluids

Compatibility

Designed as an OEM-style interchangeable pilot counterbore compatible with standard straight-shank drill press chucks and milling machine collets accepting a 15/64-inch shank diameter.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with rotating cutting tools. Secure the straight shank firmly in a drill press chuck or milling machine collet before operation, and verify pilot fit before beginning the cut. Always power down the machine and bring the spindle to a complete stop before changing or inspecting the pilot. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality.