Keo 906-000-071 Combo Drill Countersink 1/8 in Hss

Product Description

The KEO 906-000-071 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single pass. Built from high-speed steel with a bright, uncoated finish, this tool features a 1/8-inch body diameter, a 3/64-inch drill point diameter, and an 82-degree included angle suited for standard countersunk fastener preparation. The 118-degree drill point angle provides clean entry into workpieces, while the right-hand cut and plain cutting edge style suit general-purpose metalworking and fabrication tasks. Machinists, tool-and-die professionals, and maintenance technicians install this type of tooling in drill presses, CNC lathes, and hand-held drilling equipment.

This combo drill countersink is used in applications requiring a precisely formed countersunk seat ahead of flat-head or oval-head fastener installation. Its compact overall length of 1-1/4 inches and small-diameter profile make it well suited for light-duty countersinking in steel, aluminum, brass, and similar materials. The double end type allows the tool to be reversed and reused, extending service life in production and repair environments.

Key Features

• High-speed steel construction for durability in metal cutting applications
• Bright, uncoated finish suitable for standard-duty countersinking
• 118-degree drill point angle for clean, accurate entry
• 82-degree included angle matches standard countersunk fastener geometry
• Double-end design extends usable tool life
• Right-hand cut with plain cutting edge for straightforward operation

Compatibility

Designed as a standard combo drill countersink for use in drill presses, lathes, and rotary drilling equipment that accept straight-shank tooling of 1/8-inch body diameter.

Installation Notes

This tool is installed and operated by machinists or maintenance technicians familiar with rotary cutting equipment. Ensure the workpiece is securely clamped and the spindle is running at a speed appropriate for the material and tool diameter before engaging the cut. Inspect the cutting edges for wear before each use and replace the tool or flip to the second end when dulling is detected. Do not exceed the recommended RPM range for high-speed steel tooling in the material being worked.