Keo 919-000-295 Countersink 1 in 100 Deg 3 Flute Cobalt

Product Description

The KEO 919-000-295 is a single-end countersink designed for deburring, chamfering, and countersinking operations in metal fabrication and machining applications. Built from cobalt steel, this tool handles harder workpiece materials where standard high-speed steel cutters fall short. It features a 1-inch head diameter, a 100-degree included angle, and a 3-flute cutting geometry that produces a smooth finish while clearing chips efficiently. The straight cylindrical shank measures 3/8 inch in diameter and is compatible with standard drill chucks and milling machine collets. Overall length is 1.5 inches. This tool is typically specified by machinists, tool-and-die makers, and metalworking shops.

The 919-000-295 is suited for countersinking fastener seats, chamfering hole edges, and deburring drilled holes in ferrous and non-ferrous metals. The 100-degree included angle matches common aerospace and automotive fastener seat specifications. Cobalt steel construction allows use on stainless steel, hardened alloys, and cast iron where heat buildup at the cutting edge is a concern. It is commonly used in CNC machining centers, manual mills, and drill press setups where a right-hand cutting direction is standard.

Key Features

• 1-inch head diameter with a 100-degree included angle for standard fastener countersinking
• 3-flute design promotes smooth surface finish and efficient chip evacuation
• Cobalt steel construction provides increased heat and wear resistance over standard HSS
• 3/8-inch straight cylindrical shank fits standard chucks and collets
• Right-hand cut for use with conventional clockwise-rotating spindles
• Single-end design with shank attachment method for rigid tool holding

Compatibility

Designed as a direct-fit countersink for use in drill chucks, end mill holders, or collet chucks accepting a 3/8-inch straight cylindrical shank, suitable for manual and CNC machining setups.

Installation Notes

Installation is performed by machinists and toolroom technicians. Secure the shank fully in the chuck or collet and verify runout before cutting. Power down and de-energize the machine spindle completely before inserting or removing the tool. Follow the machine manufacturer's recommended speeds and feeds for cobalt tooling on the workpiece material being cut.