Value Collection 08906521 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08906521 is a counterbore pilot used to guide counterbore cutting tools during machining operations. The pilot aligns with the existing hole to keep the counterbore centered and consistent, reducing runout and improving seat quality. It is made from carbon steel with a bright, uncoated finish. The shank diameter measures 5/16 inches and the head diameter measures 13/16 inches. This tool is a standard component in machine shops, maintenance facilities, and fabrication environments where accurate counterboring is required.

This counterbore pilot is suited for use in manual drill press operations, CNC setups, and bench machining tasks where a precise counterbore seat is needed for socket head cap screws or similar fasteners. It fits into compatible counterbore bodies that accept a 5/16-inch shank pilot. Machinists and maintenance technicians working with carbon steel, aluminum, and similar workpiece materials will find this pilot appropriate for general-purpose counterboring applications.

Key Features

• 5/16-inch shank diameter for use in compatible counterbore tool bodies
• 13/16-inch head diameter guides the counterbore cutter to the correct seat diameter
• Carbon steel construction provides adequate hardness for general-purpose machining
• Bright, uncoated finish allows for easy visual inspection of wear
• Compact and lightweight at 0.18 pounds for easy handling and storage

Compatibility

Designed as a replacement or spare pilot for counterbore tool bodies that accept a 5/16-inch shank pilot with a 13/16-inch head diameter.

Installation Notes

This pilot is installed by a machinist or maintenance technician into a compatible counterbore body before use. Ensure the machine spindle is fully powered down and at rest before inserting or removing the pilot. The pilot should seat securely in the counterbore body with no play before beginning the cut. Inspect the pilot for wear or damage before each use to maintain accurate counterbore alignment.