Value Collection GH8815235 Counterbore 23/64 in Cobalt

Product Description

The VALUE COLLECTION GH8815235 is a 3-flute interchangeable pilot counterbore designed for precision recess cutting in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers durability and heat resistance when working with tough materials. It features a 23/64-inch counterbore diameter and a 5/16-inch straight shank, with an overall length of 4-1/16 inches and a shank length of 3-1/16 inches. Right-hand cutting direction ensures compatibility with standard drill press and milling setups. The interchangeable pilot design allows the operator to swap pilots to match different fastener clearance requirements without replacing the entire body.

This counterbore is suited for metalworking environments where consistent, flat-bottomed recesses are required for socket head cap screws, bolts, and similar fasteners. It is commonly used in machine shops, aerospace fabrication facilities, and general manufacturing settings. The cobalt construction makes it a practical choice when cutting through hardened steel, stainless steel, and other high-strength alloys where high-speed steel tooling would wear prematurely.

Key Features

• 23/64-inch counterbore diameter for precise recess sizing
• Cobalt steel construction for extended tool life in hard materials
• 3-flute geometry for smooth chip evacuation and clean recess walls
• Straight 5/16-inch shank for secure chuck or collet holding
• Interchangeable pilot accepts 5/32-inch pilot shank diameter
• Bright, uncoated finish suitable 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 5/16-inch shank. Accepts pilots with a 5/32-inch shank diameter.

Installation Notes

This tool is installed by machinists and tool-and-die professionals using a standard drill press, milling machine, or CNC machining center. Secure the 5/16-inch straight shank firmly in a matching chuck or collet before operation. Always install the appropriate pilot before use and confirm the pilot seats fully to prevent lateral movement during cutting. Apply a suitable cutting fluid when working with hardened or stainless alloys to extend tool life and improve finish quality.