Keo 907-000-179 Combo Drill Countersink Size 8 Hss

Product Description

The KEO 907-000-179 is a combination drill and countersink tool machined from high-speed steel with a bright, uncoated finish. Sized at trade size 8 with a 3/4 inch body diameter, it drills and countersinks in a single operation, reducing setup time on the machine or drill press. The 5/16 inch drill point is ground to a 118-degree point angle, and the 60-degree included angle on the countersink portion is standard for most fastener seat preparation. Overall length is 6 inches, qualifying this as a long-length tool. The double-end design extends service life by providing two usable cutting ends before the tool is retired.

This combo drill countersink is suited for metalworking, fabrication, and machining operations where countersunk fastener holes are required. The right-hand cutting direction makes it compatible with conventional drill presses, CNC machining centers, and handheld power drills running standard rotation. The plain cutting edge style handles general-purpose countersinking in ferrous and non-ferrous stock. Machinists, tool and die makers, and metal fabricators working in production or job-shop environments will find this tool fits standard toolholding setups without modification.

Key Features

• Combination drill and countersink in one tool - drills pilot hole and seats countersink in a single pass
• Double-end design provides two cutting ends for extended tool life
• 118-degree drill point angle suits standard metalworking applications
• 60-degree included countersink angle matches common flat-head fastener requirements
• Long-length at 6 inches overall for reach in deeper setups
• Bright, uncoated high-speed steel finish for general-purpose use

Compatibility

Designed as a general-purpose combination drill countersink for use in standard drill chucks and collet-style toolholders accepting a 3/4 inch shank in metalworking and fabrication applications.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician familiar with rotating cutting tools. Secure the tool firmly in the chuck or collet and verify runout before beginning a cut. Always operate at the recommended surface footage for high-speed steel tooling against the workpiece material, and apply cutting fluid where appropriate to manage heat. Power down and de-energize the machine before changing or inspecting the tool.