Value Collection GH8790180 Counterbore 9/32 in 3 Flute Hss

Product Description

The VALUE COLLECTION GH8790180 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metalworking and machining applications. The tool features a 9/32-inch counterbore diameter and a 17/64-inch straight shank, with an overall length of 3-13/16 inches and a shank length of 3-1/16 inches. Constructed from high speed steel with a bright, uncoated finish, it delivers reliable cutting performance in right-hand rotation. The interchangeable pilot design accepts a 3/32-inch pilot shank, allowing flexibility across different pilot sizes for varied hole preparations.

This counterbore is suited for machine shops, maintenance facilities, and production environments where accurate counterbore seat preparation is required. It is typically used to create recessed seats for socket head cap screws, bolts, and fasteners in steel, aluminum, and similar materials. The straight shank design is compatible with standard drill press chucks and milling machine tool holders, making it a practical general-purpose counterboring tool for machinists and tool-and-die professionals.

Key Features

• 9/32-inch counterbore diameter for precise fastener seat preparation
• 3 flutes for smooth cutting action and improved chip evacuation
• Interchangeable pilot accepts 3/32-inch pilot shank diameter
• High speed steel construction for durability across ferrous and non-ferrous materials
• Bright, uncoated finish with polished surface for reduced friction
• Right-hand cutting direction compatible with standard machine spindle rotation

Compatibility

Designed as a general-purpose interchangeable pilot counterbore compatible with standard straight-shank drill press chucks and milling machine holders accepting a 17/64-inch shank diameter.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with rotary cutting tools. Secure the straight shank firmly in a properly sized chuck or tool holder before use, and verify that the interchangeable pilot is fully seated and locked prior to operation. Always power down and de-energize the machine before changing pilots or removing the tool. Use appropriate cutting fluid or lubricant as required by the workpiece material to extend tool life and maintain cut quality.