Keo 919-000-044 Countersink Set 5 Pc Tialn Cobalt

Product Description

The KEO 919-000-044 is a 5-piece single-flute countersink set machined from cobalt steel and coated with TiAlN for extended tool life in demanding cutting applications. Head diameters range from 0.25 inches to 1 inch, covering the most common countersinking and chamfering tasks in a single kit. The 60-degree included angle is the standard for most fastener seat preparation. Overall lengths range from 1.5 inches to 2.75 inches depending on the cutter size. Shank diameters run from 0.25 inches to 0.5 inches, compatible with standard drill chucks and collet holders. The set stores in a fitted wood block for organized access at the bench or in the field.

This set is suited for metalworking, fabrication, and maintenance trades where chamfering, countersinking, and deburring operations are routine. The single-flute design reduces chatter and produces a cleaner seat than multi-flute tools in softer metals and plastics. Machinists, tool-and-die workers, pipefitters, and maintenance technicians working with steel, aluminum, and similar materials will find this set appropriate for day-to-day use. The TiAlN coating extends cutting life in abrasive materials compared to uncoated high-speed steel alternatives.

Key Features

• 5-piece set covering head diameters from 0.25 inches to 1 inch
• 60-degree included angle for standard fastener countersinking
• Single-flute geometry reduces chatter and improves surface finish
• Cobalt steel construction for heat resistance and edge retention
• TiAlN coating extends tool life in abrasive and hard materials
• Fitted wood block storage keeps tools organized and protected

Compatibility

Designed for use in standard drill chucks and collet holders accepting shank diameters of 0.25 inches to 0.5 inches. Suitable for chamfering, countersinking, and deburring operations on metal, plastic, and composite workpieces.

Installation Notes

Install each countersink securely in a drill press, milling machine, or hand drill before operation. Power down and de-energize all equipment before changing tools. Use the smallest appropriate cutter for the fastener size being seated to minimize runout and chatter. Ensure the shank is fully engaged in the chuck or collet and tightened to the equipment manufacturer's specified clamping method.