Value Collection 08907404 Counterbore Pilot 5/8 in Head

Product Description

The VALUE COLLECTION 08907404 is a counterbore pilot used to guide counterbore cutting tools during precision boring operations. The pilot aligns the cutting head concentrically with an existing hole, ensuring accurate seat depth and shoulder geometry on fastener recesses. It features a 5/8 inch head diameter and a 3/8 inch shank diameter, constructed from carbon steel with a bright, uncoated finish. This tool is suited for machinists, maintenance technicians, and fabricators performing counterbore work on steel, aluminum, and other common workpiece materials in production or job-shop environments.

Counterbore pilots of this type are used in machine shops, MRO settings, and light manufacturing wherever socket-head cap screws or similar fasteners require a flat-bottomed recess. The 3/8 inch shank seats into the body of a compatible counterbore cutter, and the 5/8 inch head engages the pilot hole to center the cut. This pilot is appropriate for bench-top drill press work as well as manual or CNC milling operations where counterbore tooling requires an interchangeable or replacement pilot.

Key Features

• 5/8 inch head diameter for accurate bore centering
• 3/8 inch shank diameter for secure tool-body engagement
• Carbon steel construction for durability in general machining applications
• Bright, uncoated finish for straightforward inspection and dimensional verification
• Lightweight at 0.18 pounds for easy handling and tool-change efficiency

Compatibility

Designed as an OEM-style replacement or spare pilot for counterbore cutting tools accepting a 3/8 inch shank pilot with a 5/8 inch head diameter.

Installation Notes

Installation is performed by machinists or tooling technicians. Ensure the counterbore body is fully de-energized and the spindle is locked or the machine is powered down before swapping pilots. The pilot should be seated firmly and retained per the counterbore manufacturer's locking mechanism before resuming cutting operations. Inspect the pilot shank and head for wear or damage before each use to maintain concentricity and bore quality.