Value Collection 08909889 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08909889 is a counterbore pilot used to guide counterboring operations in metalworking and machining applications. The pilot fits into a pre-drilled hole to keep the counterbore cutter centered and on-axis during cutting. It features a 1-11/16 inch head diameter and a 1/2 inch shank diameter, machined from carbon steel with a bright uncoated finish. This tool is suited for machinists, toolroom technicians, and trade professionals performing precision hole finishing work on ferrous and non-ferrous materials.

Counterbore pilots are used in production machining, maintenance, and repair operations where a flat-bottomed recess is required around a drilled hole, typically to seat socket head cap screws or similar fasteners flush or below a workpiece surface. The 1/2 inch shank diameter makes it compatible with standard counterbore holders and chucks used across a wide range of bench and CNC drill press setups in industrial and commercial shop environments.

Key Features

• 1-11/16 inch head diameter for accurate counterbore seating
• 1/2 inch shank diameter for use with standard counterbore holders
• Carbon steel construction for durability in typical machining applications
• Bright uncoated finish — no coating to affect dimensional tolerances
• Single-piece unit sold individually

Compatibility

Designed as a standard replacement or supplemental pilot for counterbore sets and holders accepting a 1/2 inch shank pilot in typical machining and metalworking applications.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with counterboring operations. Ensure the drill press or machining center is fully powered down and secured before changing or seating the pilot. Verify the shank fits the counterbore holder without play before beginning the cut to maintain concentricity and avoid tool runout.