Value Collection GH8790305 Counterbore 15/32in 3 Flutes Hss

Product Description

The VALUE COLLECTION GH8790305 is a 3-flute, straight-shank interchangeable pilot counterbore designed for precise counterboring operations in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated finish, this tool delivers reliable cutting performance on ferrous and non-ferrous materials. The counterbore measures 15/32 inches in diameter with a 7/16-inch straight shank and an overall length of 4-5/16 inches. Right-hand cutting geometry suits standard drill press and milling machine setups. This tool is installed and used by machinists, tool-and-die professionals, and maintenance technicians working with bolted assemblies that require recessed fastener seating.

This interchangeable pilot counterbore is suited for general-purpose counterboring in shop environments, production floors, and field maintenance applications. The 3-flute design balances material removal rate with surface finish quality. The straight shank fits standard drill chucks and collet holders with a 7/16-inch bore. The interchangeable pilot feature accepts a 3/16-inch pilot shank, allowing the cutting head to be used with compatible pilot shanks for centered, accurate counterbores in clearance holes for socket head and hex head cap screws.

Key Features

• 15/32-inch counterbore diameter for precise recessed seat cutting
• 3-flute geometry for balanced cutting and improved chip evacuation
• High speed steel construction for durability on ferrous and non-ferrous materials
• Bright, uncoated finish suitable for general-purpose machining
• 7/16-inch straight shank compatible with standard drill chucks and collets
• Interchangeable pilot accepts 3/16-inch pilot shank diameter

Compatibility

Designed as an interchangeable pilot counterbore compatible with 3/16-inch pilot shanks. Fits drill presses, milling machines, and hand drills equipped with chucks or collets accepting a 7/16-inch straight shank.

Installation Notes

Installation is performed by machinists or maintenance technicians. Secure the straight shank firmly in the chuck or collet before operation and verify the pilot shank is fully seated and locked before cutting. Always power down the machine and allow the spindle to come to a complete stop before changing pilots or inspecting the cutting edges. Use appropriate cutting fluid or lubricant for the workpiece material to extend tool life and improve surface finish.