Keo 919-000-577 Countersink 1/4 in 82 Deg Cobalt Steel

Product Description

The KEO 919-000-577 is a single-flute cobalt steel countersink designed for chamfering, countersinking, and deburring operations in metal fabrication and machining. It features a 1/4 inch head diameter with an 82-degree included angle, making it well-suited for standard flathead fastener seat preparation. The cobalt steel construction provides elevated heat and wear resistance compared to standard high-speed steel, which is important when working harder alloys or in higher-feed applications. With a 1/4 inch shank diameter and an overall length of 1.5 inches, this tool fits standard drill chucks and collet holders commonly found in machine shop and field environments.

This countersink is used in light machining, sheet metal work, and general metalworking applications where precise fastener seat angles and clean deburring are required. The single-flute design reduces chatter and produces a smooth finish in a single pass. It is appropriate for use in drill presses, CNC machining centers, and hand-held power tools where a 1/4 inch shank is accepted. Typical users include machinists, tool and die technicians, and maintenance tradespeople working with steel, aluminum, and similar materials.

Key Features

• 82-degree included angle for standard flathead fastener countersinking
• Single-flute geometry minimizes chatter and improves surface finish
• Cobalt steel construction resists heat and wear in demanding materials
• 1/4 inch shank diameter fits standard drill chucks and collet holders
• Compact 1.5 inch overall length suits close-clearance applications
• Suitable for chamfering, countersinking, and deburring in one tool

Compatibility

Designed as an OEM-style single-flute countersink for use in any drill press, machining center, or power tool accepting a 1/4 inch round shank.

Installation Notes

Installation and use of this countersink should be performed by a qualified machinist or trained tradesperson. Secure the shank firmly in the chuck or collet before operation and verify runout is within acceptable limits for the application. Power down and lock out the machine before changing tooling. Do not exceed the recommended speed range for the workpiece material and tool diameter.