Value Collection 08906448 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08906448 is a counterbore pilot used to guide counterboring operations and maintain accurate hole alignment during machining. The pilot seats into a pre-drilled hole and centers the counterbore cutter, ensuring a flat-bottomed recess is cut concentrically with the existing bore. It features an 11/16 inch head diameter and a 5/16 inch shank diameter. Constructed from carbon steel with a bright, uncoated finish, this pilot is suited for general-purpose shop work on ferrous and non-ferrous materials. Machinists, tool and die technicians, and maintenance mechanics are the typical users.

This counterbore pilot is appropriate for use in machine shops, maintenance facilities, and fabrication environments where counterboring operations are performed on drill presses, milling machines, or manual equipment. It is used to create recesses for socket head cap screws, button head fasteners, and similar hardware requiring a flat-seated bearing surface. The 5/16 inch shank diameter fits standard counterbore holders designed for that shank size.

Key Features

• 11/16 inch head diameter for accurate recess sizing
• 5/16 inch shank diameter for standard tool holder compatibility
• Carbon steel construction provides adequate hardness for general-purpose machining
• Bright, uncoated finish allows visual inspection of tool condition
• Compact and lightweight at 0.15 pounds for easy handling and storage

Compatibility

Designed as an OEM-style replacement or standard pilot for counterbore tool sets accepting a 5/16 inch shank diameter pilot.

Installation Notes

Installation is performed by machinists using standard counterbore holders compatible with a 5/16 inch shank. Secure the pilot firmly in the holder before beginning any cutting operation and verify the pilot fits the pilot hole without excessive play. Always power down and lock out the machine spindle before changing or seating pilots. Follow applicable shop safety procedures and applicable OSHA machining standards when operating counterboring equipment.