Keo 907-000-139 Combo Drill Countersink 3/8 in Hss

Product Description

The KEO 907-000-139 is a combination drill and countersink designed to perform both drilling and countersinking operations in a single pass. Built from high-speed steel with a bright, uncoated finish, it features a 3/8 inch body diameter, a 9/64 inch drill point diameter, and a 118-degree drill point angle. The 90-degree included angle on the countersink portion produces clean, standard conical seats in one step. At 6 inches overall length, it is classified as a long-length tool. Machinists, tool-and-die technicians, and metalworking shops use this tool in drill presses, lathes, and CNC equipment for center-drilling and spot-facing operations.

This combo drill countersink suits general metalworking applications where a center hole and countersink must be produced simultaneously. The double-end style extends tool life by offering two usable cutting ends. The right-hand cutting direction is standard for conventional drilling setups. It is intended for use in materials compatible with high-speed steel cutting geometry, including mild steel, aluminum, and similar workpiece materials in both production and maintenance environments.

Key Features

• Combines drilling and countersinking in one tool, reducing setup time and tool changes
• High-speed steel construction provides durability across a range of metalworking materials
• Double-end design offers two cutting ends, extending usable tool life
• 118-degree drill point angle for standard center-drilling geometry
• 90-degree included angle produces standard countersink seats
• 6 inch overall length classified as a long-length tool for deeper reach applications

Compatibility

Designed as an OEM-style combo drill countersink suitable for use in standard drill press, lathe, or CNC spindles accepting a 3/8 inch body diameter tool.

Installation Notes

Installation and use of this tool is typically performed by machinists or qualified metalworking technicians. Secure the tool firmly in the appropriate collet or chuck before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Ensure the machine is fully powered down and the spindle has stopped completely before changing or inspecting the tool. Do not exceed the recommended feed rate for the material being cut to avoid tool breakage or workpiece damage.