Keo 906-000-144 Combo Drill Countersink Size 6 Cobalt

Product Description

The KEO 906-000-144 is a combination drill and countersink designed to drill a pilot hole and countersink in a single operation. Made from cobalt tool steel with a bright uncoated finish, this tool handles tough materials including stainless steel, hardened alloys, and high-strength metals. The 7/32 inch drill point with a 118-degree point angle starts cleanly and cuts accurately. The 60-degree included angle on the countersink portion seats flat-head fasteners flush. At 3 inches overall length with a 1/2 inch body diameter, it fits standard drill chucks and milling machine setups. Trade size 6 makes it a direct fit for the corresponding fastener series.

This combo drill countersink is suited for metalworking applications in machine shops, fabrication environments, and maintenance trades. It is commonly used when preparing holes for flat-head machine screws or rivets in steel, stainless, aluminum, and similar workpiece materials. The right-hand cutting direction is compatible with standard drill press, lathe, or CNC spindle rotation. The plain cutting edge style and non-tapered body make it straightforward to use without specialized tooling adapters. It is not designed for aircraft-style applications.

Key Features

• Cobalt tool steel construction for durability in tough and abrasive materials
• 118-degree drill point angle for clean starts on metal workpieces
• 60-degree included countersink angle seats flat-head fasteners flush
• Drill and countersink in a single pass, reducing tool changes
• Bright uncoated finish for use across a range of metalworking applications
• Right-hand cut compatible with standard machine rotation

Compatibility

Designed as a trade size 6 combination drill countersink for use with standard drill chucks and milling or drill press setups requiring a 1/2 inch body diameter tool.

Installation Notes

This tool is installed and operated by machinists, tool and die workers, and metalworking tradespeople. Secure the 1/2 inch body firmly in a compatible drill chuck or collet before operation. Power down the machine completely before changing or adjusting the tool. Use appropriate cutting fluid or lubricant for the workpiece material to extend tool life and improve finish quality.