Cleveland C46316 Counterbore Pilot Hss Bright Finish

Product Description

The CLEVELAND C46316 is a counterbore pilot designed to guide counterboring tools during precision machining operations. With a 0.75-inch head diameter and a 0.1875-inch shank diameter, this pilot ensures accurate alignment and concentricity when enlarging previously drilled holes to accept socket head cap screws or similar fasteners. Constructed from high-speed steel (HSS) with a bright, uncoated finish, it delivers the hardness and wear resistance required for production and maintenance machining environments. Machinists and tool-and-die professionals working with manual mills, CNC machining centers, or drill presses rely on pilots like this to maintain bore quality and reduce chatter during the counterboring pass.

This counterbore pilot is suited for use in metalworking shops, maintenance repair operations, and manufacturing environments where consistent counterbore depth and alignment are required. It is compatible with interchangeable-pilot counterbore sets that accept a 0.1875-inch shank. Typical applications include preparing bolt-hole patterns in steel, aluminum, and other machinable metals where a clean, flat-bottomed recess is needed for fastener seating.

Key Features

• 0.75-inch head diameter for precise counterbore guidance
• 0.1875-inch shank diameter for compatibility with standard interchangeable-pilot counterbore bodies
• High-speed steel construction provides hardness and durability in metalworking applications
• Bright, uncoated finish — no coating buildup to affect pilot fit or bore tolerance
• Sold as a single pilot for targeted replacement or tooling builds

Compatibility

Designed for use with interchangeable-pilot counterbore tool bodies that accept a 0.1875-inch shank pilot. Confirm shank diameter and head diameter requirements against your counterbore body specifications before ordering.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the machine spindle is fully powered down and the tool holder is secure before inserting or removing the pilot. The pilot should slip-fit into the counterbore body without forcing — inspect the shank and body bore for chips or burrs before assembly. Follow your facility's standard tooling change procedures and applicable machine guarding requirements.