Keo 906-000-118 Combo Drill Countersink Size 4 Hss

Product Description

The KEO 906-000-118 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Made from high-speed steel with a bright, uncoated finish, this tool features a 5/16-inch body diameter, a 1/8-inch drill point diameter, and a 90-degree included angle for standard countersink profiles. The right-hand cut and plain cutting edge style make it compatible with conventional drill press and hand-drill setups. At 2-1/8 inches overall length, it is well suited for compact work envelopes. Machinists, fabricators, and maintenance technicians use this tool to prepare fastener seats without tool changes.

This combo drill countersink is rated for trade size 4 applications and is intended for countersinking work where a clean, angled seat is required ahead of flat-head or oval-head fastener installation. The double end type provides two usable cutting ends, extending tool life. Its non-tapered, non-aircraft-style geometry fits standard production and maintenance tasks in metal fabrication shops, plumbing rough-in work, and general mechanical assembly. The 118-degree drill point angle is the standard geometry for drilling into steel and similar materials.

Key Features

• High-speed steel construction for durability in metal cutting applications
• Bright, uncoated finish suitable for general-purpose countersinking
• 90-degree included angle produces standard flat-head fastener seats
• 118-degree drill point angle for efficient penetration into steel
• Double-end design extends usable tool life
• Right-hand cut compatible with standard drill presses and hand drills

Compatibility

Designed as a standard combo drill countersink for use in conventional drill press chucks and hand-drill setups accepting a 5/16-inch shank body diameter.

Installation Notes

This tool is installed and operated by machinists, fabricators, or maintenance technicians using a drill press or handheld drill. Secure the workpiece firmly before operation to prevent walking at the drill point. Verify spindle speed is appropriate for the material being countersunk before engaging the tool. Inspect both cutting ends for wear or damage before each use and replace the tool if chipping or blunting is observed.