Value Collection 08906646 Counterbore Pilot 1 in Head

Product Description

The VALUE COLLECTION 08906646 is a counterbore pilot used to guide counterboring tools during precision machining and metalworking operations. The pilot aligns the counterbore cutter concentrically with an existing hole, ensuring accurate seat depth and consistent finish across repeated operations. Constructed from carbon steel with a bright uncoated finish, this pilot features a 1 inch head diameter and a 5/16 inch shank diameter. It is a standard hand-off component for machinists, tool and die workers, and maintenance technicians performing counterbore work on ferrous and non-ferrous workpieces.

This counterbore pilot is suited for use in machine shops, production floor environments, and maintenance repair operations where countersunk fastener seats must be cut to precise depth. The 5/16 inch shank fits compatible counterbore tool holders designed for that shank size. The 1 inch head provides adequate bearing surface for controlled guidance during cutting. Carbon steel construction makes it appropriate for general-purpose drilling and boring applications on mild steel, aluminum, and similar materials.

Key Features

• 1 inch head diameter provides a stable piloting surface for counterbore alignment
• 5/16 inch shank diameter fits standard counterbore holders designed for that shank size
• Carbon steel construction offers durability for general-purpose machining use
• Bright uncoated finish allows easy visual inspection and dimensional verification
• Compact and lightweight at 0.31 pounds for easy handling and storage

Compatibility

Designed as a standard replacement or spare counterbore pilot for tool holders and counterbore sets accepting a 5/16 inch shank with a 1 inch head diameter pilot.

Installation Notes

Counterbore pilots are installed and serviced by machinists and maintenance technicians using standard lathe, drill press, or milling equipment. Ensure the machine spindle is fully stopped and locked out before changing or inspecting the pilot. Verify shank fit and seating in the tool holder before beginning any cutting operation. Do not force the pilot into an undersized holder, as this can damage the shank or affect concentricity.