Value Collection 08904443 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08904443 is a counterbore pilot used to guide counterbore cutters during machining operations. It features an 11/16 inch head diameter and a 3/16 inch shank diameter, making it suited for precise alignment when enlarging or finishing bolt-seat recesses. Constructed from carbon steel with a bright uncoated finish, this pilot maintains dimensional accuracy under standard shop cutting conditions. Machinists, maintenance technicians, and tool-and-die professionals install this type of pilot to keep counterbore tools centered on a pre-drilled hole, reducing runout and producing a clean, flat-bottomed seat for fastener heads.

This counterbore pilot is used in machine shop, maintenance, and fabrication environments where accurate fastener recesses are required in metal workpieces. Typical applications include preparing bolt seats in structural steel, machinery frames, and fabricated assemblies. It fits into a compatible counterbore tool body that accepts a 3/16 inch shank pilot. The part ships as a single unit and is appropriate for any shop or field technician working with counterbore sets on carbon steel or similar materials.

Key Features

• 11/16 inch head diameter provides a stable bearing surface inside the counterbore cutter
• 3/16 inch shank diameter for use with counterbore tools designed for that pilot size
• Carbon steel construction offers adequate hardness for general-purpose counterboring operations
• Bright uncoated finish allows straightforward visual inspection of the pilot condition
• Compact and lightweight at 0.12 pounds, easy to store with a counterbore set

Compatibility

Designed as a replacement or spare pilot for counterbore tool bodies that accept a 3/16 inch shank pilot with an 11/16 inch head diameter. Confirm shank and head dimensions against your existing counterbore set before ordering.

Installation Notes

A machinist or maintenance technician installs this pilot into the corresponding counterbore cutter body by pressing or threading it in per the tool manufacturer's procedure. Secure the workpiece firmly before operation and ensure the pilot seats fully before beginning the cut. Inspect the pilot for wear or damage before each use, as a worn pilot will cause runout and an out-of-tolerance recess. Follow standard shop safety practices, including appropriate eye protection and machine guarding.