Keo 919-000-987 Countersink Set 5 Pc Solid Carbide Tialn

Product Description

The KEO 919-000-987 is a 5-piece solid carbide countersink set designed for chamfering, countersinking, and deburring operations in metal fabrication and machining applications. Each countersink in the set features a single flute geometry and a 100-degree included angle, with head diameters ranging from 0.25 inches to 0.75 inches. The tools carry a TiAlN coating for improved heat resistance and extended tool life at higher cutting speeds. Overall lengths range from 2.0 inches to 2.75 inches. The set is stored in a plastic case for organized tool access in shop environments. Machinists and tool-and-die professionals are the primary installers of this tooling.

This countersink set is suited for general-purpose metalworking where a range of countersink sizes is needed at a single workstation. The five included countersinks cover shank diameters from 0.25 inches (1/4 inch) to 0.375 inches (3/8 inch), making them compatible with standard drill press chucks and CNC spindle toolholders in that range. Typical applications include preparing holes for flat-head fasteners, breaking sharp edges on machined parts, and deburring drilled holes in steel, aluminum, and similar materials. The plastic storage case keeps the set organized and protects the carbide cutting edges between uses.

Key Features

• 5-piece set with head diameters from 0.25 inches to 0.75 inches in a single case
• Solid carbide construction for rigidity and wear resistance
• TiAlN coating improves heat resistance and extends tool life
• Single-flute design for clean chip evacuation during countersinking
• 100-degree included angle on all pieces for consistent fastener seating
• Plastic storage case included for bench or toolbox organization

Compatibility

Designed for use in drill presses, mills, and CNC machines accepting shank diameters from 0.25 inches to 0.375 inches. Suitable for chamfering, countersinking, and deburring operations on metal workpieces.

Installation Notes

Countersinks should be installed and operated by qualified machinists or toolroom personnel. Secure the shank firmly in the appropriate collet or chuck before operation, and verify that the machine spindle is fully stopped before changing tools. Follow applicable shop safety standards and machine manufacturer guidelines for maximum RPM relative to tool diameter and material being cut.