Value Collection GH8815482 Counterbore 3/4in 3 Flute Cobalt

Product Description

The VALUE COLLECTION GH8815482 is a 3-flute interchangeable pilot counterbore designed for precision hole enlargement and seat finishing in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this counterbore measures 3/4 inches in cutting diameter and features a 1/2-inch straight shank for secure tool holding in standard drill presses and milling setups. The overall length is 5-3/8 inches, with a shank length of 3-7/8 inches. Right-hand cutting geometry and a 3-flute configuration provide smooth material removal and accurate seat formation across a range of workpiece materials.

This counterbore is suited for use in machine shops, maintenance facilities, and production environments where consistent countersunk or counterbored hole profiles are required. It is compatible with 1/4-inch interchangeable pilots, allowing the pilot to be swapped to match different fastener or hole specifications without replacing the counterbore body. Typical applications include bolt-seat preparation, fastener recess work, and finish boring in steel, stainless, and other ferrous metals where cobalt tooling provides the necessary heat and wear resistance.

Key Features

• 3/4-inch counterbore diameter for standard fastener seat applications
• Cobalt steel construction for improved heat resistance and tool life in ferrous materials
• 3-flute design promotes smooth cutting action and accurate seat geometry
• 1/2-inch straight shank compatible with standard drill press and mill chucks
• Interchangeable pilot system accepts 1/4-inch pilots for flexible fastener fitment
• Bright, uncoated finish with polished flutes for clean chip evacuation

Compatibility

Designed for use with 1/4-inch interchangeable counterbore pilots. Compatible with standard drill presses, milling machines, and drill chucks that accept a 1/2-inch straight shank.

Installation Notes

Installation is performed by machinists or toolroom technicians using a drill press or milling machine with an appropriate chuck. Ensure the workpiece is securely fixtured and the machine is set to a speed appropriate for cobalt tooling in the target material before engaging the cut. Always insert the correct pilot size before use and inspect the pilot and body for wear between operations. Follow standard shop safety practices including eye protection and proper chip clearance procedures.