Value Collection GH8830606 Counterbore 15/16in 4 Flute Hss

Product Description

The VALUE COLLECTION GH8830606 is a 4-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and aircraft-style applications. Built from high-speed steel with a bright, uncoated polished finish, this tool features a 15/16-inch counterbore diameter and a 1/2-inch straight shank for secure chuck engagement. The right-hand cutting direction and 5-3/8-inch overall length make it well-suited for production environments where consistent seating depths and clean bore finishes are required. Machinists and toolroom technicians install this type of counterbore on lathes, drill presses, and milling machines.

This interchangeable pilot counterbore is intended for use in aircraft-style machining operations where precise fastener seat geometry is critical. The interchangeable pilot system allows the same body to accept different pilot diameters, increasing tooling versatility across varying hole sizes. The 3/16-inch pilot shank diameter compatibility makes it appropriate for light to medium counterboring tasks in aluminum, mild steel, and similar machinable alloys commonly encountered in aerospace and general metalworking environments.

Key Features

• 15/16-inch counterbore diameter for accurate fastener seat sizing
• 4-flute geometry promotes smooth cutting action and clean bore finish
• High-speed steel construction provides wear resistance across a range of machinable metals
• Bright, uncoated polished finish suitable for general-purpose and aircraft-style applications
• Interchangeable pilot design allows pilot diameter changes without replacing the counterbore body
• 1/2-inch straight shank compatible with standard drill chucks and collet holders

Compatibility

Designed for use with interchangeable pilot systems accepting a 3/16-inch pilot shank diameter. Fits standard 1/2-inch straight-shank tool holders on drill presses, lathes, and milling machines used in aircraft-style and general metalworking applications.

Installation Notes

Installation and operation should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tools. Secure the 1/2-inch straight shank firmly in a properly sized chuck or collet before operation, and verify that the pilot is fully seated and locked before engaging the workpiece. Always power down and lock out the machine before changing pilots or inspecting the tool. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.