Value Collection GH8815607 Counterbore 15/16 in Cobalt

Product Description

The VALUE COLLECTION GH8815607 is a 3-flute interchangeable pilot counterbore designed for precision spot-facing and counterboring operations in metalworking applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers the heat resistance and hardness needed for cutting ferrous metals and harder alloys. The straight shank measures 3/4 inch in diameter and 4-5/8 inches in length, with an overall length of 6-1/8 inches. The 15/16-inch cutting diameter is compatible with 1/4-inch pilot shanks. Right-hand cutting direction suits standard drill press and milling machine spindle rotation.

This counterbore is suited for machine shops, maintenance facilities, and production environments where consistent counterbore depth and diameter are required. It is commonly used to recess bolt or screw heads flush with or below a workpiece surface. The interchangeable pilot design allows the tool to accept different pilot shank sizes, making it adaptable across a range of fastener sizes without replacing the entire body. Machinists, tool-and-die workers, and maintenance technicians working with steel, cast iron, and similar materials will find this tool appropriate for their setups.

Key Features

• 15/16-inch counterbore diameter for precise seat cutting around fastener heads
• Cobalt steel construction provides elevated heat resistance for hard-material cutting
• 3-flute geometry balances chip clearance and cutting stability
• Straight 3/4-inch shank fits standard drill press and milling machine collets or chucks
• Interchangeable pilot accepts 1/4-inch pilot shanks for versatile fastener compatibility
• Bright, uncoated finish with polished surface for reduced friction in ferrous cutting

Compatibility

Designed as an OEM-style replacement or direct-use counterbore for standard straight-shank toolholders accepting a 3/4-inch shank diameter; compatible with 1/4-inch interchangeable pilot shanks.

Installation Notes

This tool is installed by qualified machinists or maintenance technicians using a drill press, milling machine, or similar machine tool. Ensure the spindle is fully powered down and locked out before securing the shank in the chuck or collet. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish. Inspect the pilot shank for secure seating before beginning any cutting operation.