Keo 907-000-166 Combo Drill Countersink Size 6 Hss

Product Description

The KEO 907-000-166 is a combination drill and countersink designed for simultaneous center drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, it delivers consistent performance in ferrous and non-ferrous materials. The tool features a 1/2 inch body diameter, a 7/32 inch drill point diameter, and a 90-degree included angle, making it well suited for preparing holes that accept flat-head fasteners. With a 5 inch overall length, this is a long-length tool appropriate for applications requiring extended reach. The right-hand cut and plain cutting edge provide straightforward material removal without special tooling requirements.

This combo drill countersink is used in machine shops, fabrication facilities, and maintenance environments where countersunk holes are required for size 6 fasteners. The double end type extends tool life by providing two usable ends before replacement. It is suited for use in drill presses, lathes, and CNC machining centers. Machinists, tool and die workers, and maintenance mechanics will find this tool appropriate for production and repair work where consistent countersink geometry is needed.

Key Features

• High-speed steel construction for durability in ferrous and non-ferrous materials
• Double end design provides two usable cutting ends for extended tool life
• 90-degree included angle for standard flat-head fastener countersinking
• 118-degree drill point angle for accurate center starting
• Long-length tool at 5 inches overall for extended reach applications
• Right-hand cut with plain cutting edge style for straightforward operation

Compatibility

Designed as an OEM-style replacement or standard tooling solution for size 6 combo drill countersink applications in drill presses, lathes, and compatible CNC machining setups requiring a 1/2 inch body diameter countersink tool.

Installation Notes

This tool is installed by machinists and maintenance mechanics in standard drill press chucks, lathe tailstocks, or CNC tool holders that accept a 1/2 inch body diameter shank. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the tool firmly in the chuck or collet to prevent runout, and verify that feed rate and spindle speed are appropriate for the workpiece material before beginning the cut.