Keo 906-000-149 Combo Drill Countersink Size 6 Hss Tin

Product Description

The KEO 906-000-149 is a combo drill countersink designed to drill and countersink in a single pass, reducing tool changes and setup time on the shop floor or job site. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction across a wide range of materials. The 1/2-inch body diameter houses a 7/32-inch drill point with a 118-degree point angle and a 90-degree included angle for the countersink. At 3 inches overall length, it fits standard drill chucks and is suited for right-hand rotation. Machinists and metal fabricators are the primary users of this tool type.

This combo drill countersink is used in metalworking applications where flathead fasteners require a properly prepared seat. The size 6 trade designation corresponds to common flathead screw sizing in light fabrication, machine assembly, and maintenance work. The plain cutting edge style and double end type make it a straightforward drop-in for production drilling setups. It is not an aircraft-style or long-length tool, making it appropriate for standard-depth countersinking tasks in general shop environments.

Key Features

• Drills and countersinks in a single operation, eliminating a separate tool step
• High-speed steel construction handles ferrous and non-ferrous materials
• Titanium nitride (TiN) coating extends tool life and reduces built-up edge
• 118-degree drill point angle with 90-degree included countersink angle
• Right-hand cut, plain cutting edge, double end type
• Non-tapered body with 1/2-inch diameter fits standard drill chucks

Compatibility

Designed as an OEM-style replacement or standard combo drill countersink for use with size 6 flathead fasteners in general metalworking and fabrication applications.

Installation Notes

Install in a drill press, lathe tailstock, or hand drill with a compatible 1/2-inch or adjustable chuck. Secure the workpiece before operation and use appropriate cutting fluid on hard materials to preserve coating life. Inspect the cutting edges before each use and replace the tool if chipping or excessive wear is observed. Follow applicable shop safety standards for rotating cutting tools.