Value Collection GH8815649 Counterbore 1 in 3 Flute Cobalt

Product Description

The VALUE COLLECTION GH8815649 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers durability and heat resistance in demanding cutting environments. It features a 1-inch counterbore diameter and a 3/4-inch straight shank, with an overall length of 6-3/8 inches. The interchangeable pilot design accepts a 5/16-inch pilot shank, allowing the cutting tool to be paired with different pilot sizes without replacing the entire body. Right-hand cutting geometry is standard. This counterbore is suited for machinists and tool-and-die professionals working with steel and similar materials.

This counterbore is intended for use in machine shops, maintenance and repair operations, and production environments where accurate counterbored holes are required for socket head cap screws and similar fasteners. The cobalt construction makes it appropriate for harder workpiece materials where high-speed steel tooling may wear prematurely. It fits standard milling machines, drill presses, and CNC machining centers equipped with a compatible 3/4-inch straight shank holder. The 4-5/8-inch shank length provides adequate reach for most standard setups.

Key Features

• 1-inch counterbore diameter for precise seat creation
• Cobalt steel construction for extended tool life in hard materials
• 3 flutes for efficient chip evacuation and smooth cutting action
• Interchangeable pilot accepts 5/16-inch pilot shank diameter
• 3/4-inch straight shank with 4-5/8-inch shank length for secure tool holding
• Bright uncoated finish; right-hand cutting direction

Compatibility

Designed for use with standard 3/4-inch straight shank tool holders on drill presses, milling machines, and CNC machining centers; accepts a 5/16-inch interchangeable pilot shank.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators. Ensure the machine spindle and tool holder are fully powered down and locked out before mounting or changing the tool. Secure the straight shank firmly in a properly sized collet or drill chuck to prevent runout. Always verify pilot shank fit before beginning the cut, and use appropriate cutting fluid for the workpiece material to reduce heat buildup.