Value Collection GH8815144 Counterbore 7/32 in 3 Flute Cobalt

Product Description

The VALUE COLLECTION GH8815144 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 solid performance in hard and abrasive materials. It features a 7/32 inch counterbore diameter and a 15/64 inch straight shank, with an overall length of 3 inches and a shank length of 2-3/8 inches. The right-hand cutting direction and standard straight shank make it compatible with conventional drill press and milling setups. Machinists and tool-and-die professionals will find it well suited for socket-head fastener seat preparation.

This counterbore is intended for use in machine shops, maintenance facilities, and production environments where interchangeable pilot systems are standard. It accepts a 3/32 inch pilot shank, allowing the pilot to be swapped to match the clearance hole size without replacing the body. Typical applications include counterboring for socket cap screws, hex bolts, and similar fasteners in steel, stainless, cast iron, and other ferrous materials. The cobalt construction provides added heat resistance compared to standard high-speed steel, making it a practical choice when running at higher feeds or when workpiece hardness is a concern.

Key Features

• 7/32 inch counterbore diameter for precise fastener seat preparation
• Cobalt steel construction for improved heat and wear resistance over standard HSS
• 3-flute geometry for balanced cutting and chip clearance
• Interchangeable pilot design accepts 3/32 inch pilot shank
• Bright, uncoated finish suitable for use with cutting fluids
• Right-hand cutting direction; compatible with standard drill press and mill setups

Compatibility

Designed as an OEM-style replacement or direct drop-in for interchangeable pilot counterbore systems using a 15/64 inch straight shank and a 3/32 inch pilot shank diameter.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with counterboring operations. Secure the straight shank firmly in the tool holder or drill chuck before operation, and verify that the pilot shank is properly seated and locked before engaging the workpiece. Always power down the machine before changing pilots or inspecting the cutting edge. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.