Keo 906-000-218 Combo Drill Countersink Size 12 Cobalt

Product Description

The KEO 906-000-218 is a combination drill and countersink designed for drilling and countersinking in a single operation. Built from cobalt steel with a bright, uncoated finish, this tool handles tough materials including stainless steel, alloy steel, and heat-resistant alloys where high-speed steel falls short. The body diameter measures 3/16 inches with a 1/16 inch drill point diameter and a 118-degree point angle. The bell-style cutting edge and 60-degree included angle produce a clean countersink seat in one pass, reducing setup time on production runs and repair work. Licensed machinists, tool-and-die workers, and maintenance mechanics are the primary users.

This combo drill countersink suits metalworking applications where a flat or machine screw must seat flush or below the surface. Common uses include aerospace component prep, fabrication shops, and maintenance applications requiring accurate countersink geometry on hardened or exotic materials. The double-end configuration means the tool can be reversed to access a fresh cutting edge when the working end dulls, extending useful service life. It is appropriate for use in drill presses, CNC machining centers, and hand-held drill motors with a suitable chuck.

Key Features

• Cobalt steel construction for cutting hardened alloys, stainless steel, and heat-resistant materials
• 118-degree drill point angle for fast penetration and accurate center location
• Bell-style cutting edge with 60-degree included angle produces a consistent countersink seat
• Double-end design provides a second cutting edge when the first end dulls
• Right-hand cut for use with standard drill press and machining center spindle rotation
• Bright, uncoated finish suitable for use with cutting fluids across a range of workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-purchase combo drill countersink for trade size 12 applications requiring a 3/16 inch body diameter and 60-degree countersink geometry in metalworking operations.

Installation Notes

Install the tool securely in a drill chuck or collet, ensuring full shank engagement before operation. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Secure the workpiece firmly before drilling to prevent walking at the drill point. Inspect the cutting edges before each use and replace or reverse to the second end when wear is evident to maintain countersink accuracy.