Keo 90000 Cobalt Combo Drill Countersink Set 5 Pc

Product Description

The KEO 90000 is a 5-piece cobalt combination drill and countersink set covering trade sizes 1 through 5. Each tool combines the drilling and countersinking operations into a single pass, reducing tool changes and setup time on the shop floor or jobsite. The set features a 60-degree included angle with a plain cutting edge, a geometry suited for producing clean countersunk holes in steel, cast iron, and other ferrous materials. The cobalt construction provides added heat resistance compared to standard high-speed steel, making these tools a practical choice for production drilling in harder workpiece materials.

This set is intended for use by machinists, fabricators, and trade professionals who need to drill and countersink pilot holes for flathead screws and similar fasteners in a single operation. The five-piece range covers trade sizes 1 through 5, giving the user a graduated selection for different fastener sizes. Typical applications include sheet metal fabrication, light structural work, and general machine shop countersinking tasks where cobalt tooling is preferred over standard HSS.

Key Features

• 5-piece set covering trade sizes 1 through 5
• Cobalt construction for improved heat and wear resistance over standard HSS
• 60-degree included angle for standard flathead fastener countersinking
• Plain cutting edge geometry for clean, consistent results in ferrous materials
• Combination drill and countersink design completes both operations in one step

Compatibility

Designed as a general-purpose combination drill and countersink set compatible with standard drill presses, CNC machining centers, and hand-held power drills accepting straight-shank tooling in trade sizes 1 through 5.

Installation Notes

Installation and use should be performed by a qualified machinist or trained trade professional. Secure the workpiece firmly before drilling and ensure the tool is properly seated and tightened in the chuck or collet before operation. Always wear appropriate eye protection and follow applicable shop safety procedures when operating rotary cutting tools. Do not exceed the recommended speed range for the tool diameter and workpiece material.