Value Collection GH8861288 Solid Pilot Counterbore Hss

Product Description

The VALUE COLLECTION GH8861288 is a solid pilot counterbore designed for precision counterboring operations in metalworking and machining applications. Built from high speed steel, this tool delivers consistent cutting performance in steel, cast iron, and similar ferrous materials. It features a 11/16 inch counterbore diameter and a 15/32 inch pilot diameter, providing accurate bore alignment with each pass. The Morse Taper No. 2 shank mounts directly to compatible drill press spindles and milling machine quills. Three cutting flutes remove material efficiently while reducing chatter. This tool is sized for 7/16 inch fastener compatibility, making it a practical choice for machinists countersinking bolt seats and creating flat-bottomed recesses.

This counterbore is suited for job shops, maintenance machining, and production environments where consistent counterbore depth and diameter are required. It handles standard counterboring tasks on fixtures, plates, and structural components. The fixed solid pilot design maintains concentricity without the need for interchangeable pilot inserts, simplifying setup on manual drill presses and knee mills. It is intended for use by machinists and toolmakers working with 7/16 inch fastener head clearance requirements.

Key Features

• High speed steel construction provides durability across ferrous metal cutting applications
• 11/16 inch counterbore diameter sized for 7/16 inch fastener head clearance
• 15/32 inch solid pilot diameter maintains bore concentricity during cutting
• Three-flute geometry balances chip evacuation and surface finish
• Morse Taper No. 2 shank for direct mounting in standard drill press and mill spindles
• Forward cutting direction for conventional right-hand rotation machines

Compatibility

Designed as a standard solid-pilot counterbore for use in drill presses and milling machines equipped with a Morse Taper No. 2 spindle socket, suitable for counterboring operations requiring 7/16 inch fastener seat clearance.

Installation Notes

Installation is performed by machinist or toolroom personnel. Secure the Morse Taper shank fully into the machine spindle socket before operation and verify the pilot fits freely into the pre-drilled pilot hole without side play. Power down and lock out the machine before mounting or removing the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore quality.