Keo 90010 Cobalt Combo Drill Countersink Set 5 Pc

Product Description

The KEO 90010 is a 5-piece cobalt combination drill and countersink set covering trade sizes 1 through 5. Each tool combines a center-drilling tip with a countersink in a single body, reducing tool changes on the bench or machine. The set is manufactured from cobalt high-speed steel, which provides added heat and wear resistance compared to standard HSS, making it suitable for use on harder materials including stainless steel, alloy steel, and cast iron. The included angle on each tool is 60 degrees, consistent with standard center-drill geometry used in lathe and milling operations.

This set is suited for machinists, tool and die workers, and maintenance professionals who regularly center-drill workpieces before turning or need to prep countersunk holes for flat-head fasteners. Trade sizes 1 through 5 cover the most common centering and countersinking tasks encountered in light to medium manufacturing and fabrication environments. The cobalt construction makes these tools a practical choice for shops working with a variety of ferrous metals.

Key Features

• 5-piece set covering trade sizes 1 through 5
• Cobalt high-speed steel construction for improved heat and wear resistance
• 60-degree included angle for standard center-drill geometry
• Plain edge design compatible with standard drill chucks and collets
• Combination drill and countersink body reduces tool changes

Compatibility

Designed as a standard combination drill and countersink set suitable for use in lathes, milling machines, and drill presses equipped with compatible collets or chucks accepting trade sizes 1 through 5.

Installation Notes

These tools are installed by machinists or maintenance technicians into appropriate machine spindles or drill chucks. Ensure the machine is fully powered down and the spindle is locked before changing tools. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life and maintain cut quality. Always verify chuck or collet size compatibility before securing the tool.