Keo 902-000-066 Solid Pilot Counterbore 20mm 3 Flute

Product Description

The KEO 902-000-066 is a solid pilot counterbore designed for producing clean, flat-bottomed counterbore seats used with socket-head cap screws. Manufactured from cobalt steel with a bright, uncoated finish, this tool offers good hardness and heat resistance for cutting ferrous and harder materials. It features a 20 mm counterbore diameter, a 14 mm standard pilot diameter, and 3 flutes for efficient chip evacuation. The 12.5 mm shank diameter provides rigid clamping in standard tool holders. Licensed machinists, tool-and-die makers, and maintenance technicians use this type of counterbore in drill press, milling machine, and CNC applications.

This counterbore is intended for use wherever socket-head cap screws require a recessed seating hole, including machine assembly, fixture building, and general metalworking. It is compatible with 12 mm fastener sizes and is suited for both production and maintenance shop environments. The 100 mm overall length allows reach in standard setups without excessive overhang. It is appropriate for use in both manual and CNC spindle applications where a standard pilot is required.

Key Features

• Cobalt steel construction provides elevated hardness and heat resistance compared to standard HSS
• 20 mm counterbore diameter sized for 12 mm socket-head cap screw clearance
• 14 mm standard pilot diameter ensures accurate hole alignment during cutting
• 3-flute geometry promotes chip clearance and smooth cutting action
• Bright, uncoated finish allows easy visual inspection of tool condition
• 12.5 mm shank diameter fits common toolholders and drill chuck sizes

Compatibility

Designed for use with 12 mm socket-head cap screws. Suitable as an OEM-style solid pilot counterbore for general metalworking and machine assembly applications requiring a standard pilot configuration.

Installation Notes

This tool is installed and operated by machinists and maintenance technicians in drill press, milling, or CNC setups. Secure the shank fully in a drill chuck or toolholder before operation and confirm the pilot fits the pre-drilled guide hole without excessive play. Always use appropriate cutting fluid for the workpiece material and operate at speeds recommended for cobalt tooling and the material being cut. Inspect the pilot and cutting edges for wear before each use.