Keo 902-000-022 Solid Pilot Counterbore 0.572in 3 Flute

Product Description

The KEO 902-000-022 is a solid pilot counterbore designed for precision spotfacing and counterboring operations in metal fabrication and machining environments. It features a 0.572-inch counterbore diameter, a 0.375-inch pilot diameter, and three cutting flutes ground from cobalt steel for durability in tough materials. The straight cylindrical shank measures 0.5 inches in diameter, and the tool runs an overall length of 5 inches. Forward cutting direction and a bright, uncoated finish make this a straightforward, ready-to-run tool. It is typically installed by machinists and toolroom technicians working on CNC machines, drill presses, or manual mills.

This counterbore is sized specifically for 3/8-inch socket-head cap screws, making it a standard choice when preparing bolt seat recesses in assemblies where cap screw heads must sit flush or below the work surface. It is suited for use in general metalworking, aerospace component preparation, and industrial maintenance applications where clean, dimensionally accurate counterbores are required. The standard pilot configuration centers the tool in a pre-drilled clearance hole for accurate, concentric cuts.

Key Features

• 0.572-inch counterbore diameter sized for 3/8-inch socket-head cap screws
• 0.375-inch standard pilot diameter for self-centering in pre-drilled holes
• Three-flute cobalt steel construction for strength in ferrous and hard materials
• Straight cylindrical 0.5-inch shank for compatibility with standard drill chucks and holders
• Forward cutting direction with bright, uncoated finish - no additional coating required for standard applications
• 5-inch overall length provides reach for deeper workpieces

Compatibility

Designed for use with 3/8-inch socket-head cap screws. Fits standard straight-shank tool holders accepting a 0.5-inch shank diameter.

Installation Notes

Install and remove this tool with the machine fully powered down and the spindle at a complete stop. Secure the 0.5-inch shank firmly in a drill chuck or end mill holder rated for the intended spindle speed before operation. Ensure the pilot is properly seated in the pre-drilled clearance hole before engaging the cut to prevent chatter or runout. Use appropriate cutting fluid for the workpiece material to extend tool life.