Keo 902-000-065 Solid Pilot Counterbore 20mm 3 Flute

Product Description

The KEO 902-000-065 is a solid pilot counterbore designed to produce clean, flat-bottomed seat recesses for socket-head cap screws. Manufactured from cobalt steel with a bright, uncoated finish, it delivers good hardness and wear resistance in ferrous and harder workpiece materials. The tool runs a 20 mm counterbore diameter with a 13 mm standard pilot diameter and a 12.50 mm shank, and it features 3 flutes for effective chip clearance. Overall length is 100 mm. Machinists and tool-and-die professionals use this tool in manual and CNC machining centers where precise screw-seat geometry is required.

This counterbore is suited for production and maintenance machining applications where socket-head cap screw clearance holes require a properly sized seating recess. It accepts a 12 mm fastener size and uses a standard pilot for positive hole alignment during the counterboring operation. Typical applications include fixture building, machine assembly, and general metal fabrication where consistent recess depth and concentricity matter. The cobalt steel construction makes it a practical choice when working with tougher alloys that would wear down standard high-speed steel tooling more quickly.

Key Features

• 20 mm counterbore diameter sized for socket-head cap screw seating
• 13 mm standard pilot diameter for positive hole alignment
• 3-flute geometry promotes chip evacuation during cutting
• Cobalt steel construction for improved hardness and wear resistance
• Bright, uncoated finish suitable for use with cutting fluids
• 100 mm overall length accommodates typical machine spindle setups

Compatibility

Designed for use with 12 mm socket-head cap screws. Compatible with manual mills, drill presses, and CNC machining centers that accept a 12.50 mm shank diameter toolholder.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with rotating cutting tools. Secure the shank firmly in a compatible toolholder and verify runout before cutting. Always apply an appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Power down the machine and follow lockout procedures before changing or inspecting the tool.